SEMGROUP CORP, 10-Q filed on 8/5/2016
Quarterly Report
Document and Entity Information
6 Months Ended
Jun. 30, 2016
Jul. 31, 2016
Common Class A [Member]
Jul. 31, 2016
Class B
Document Type
10-Q 
 
 
Amendment Flag
false 
 
 
Document Period End Date
Jun. 30, 2016 
 
 
Document Fiscal Period Focus
Q2 
 
 
Document Fiscal Year Focus
2016 
 
 
Entity Registrant Name
SemGroup Corp 
 
 
Entity Central Index Key
0001489136 
 
 
Current Fiscal Year End Date
--12-31 
 
 
Entity Filer Category
Large Accelerated Filer 
 
 
Entity Common Stock, Shares Outstanding
 
52,813,816 
0 
Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Current assets:
 
 
Cash and cash equivalents
$ 255,780 
$ 58,096 
Restricted cash
31 
32 
Accounts receivable (net of allowance of $2,404 and $3,019, respectively)
388,668 
326,713 
Receivable from affiliates
10,219 
5,914 
Inventories
85,460 
70,239 
Other current assets
25,445 
19,387 
Total current assets
765,603 
480,381 
Property, plant and equipment (net of accumulated depreciation of $360,513 and $319,769, respectively)
1,648,962 
1,566,821 
Equity method investments
446,938 
551,078 
Goodwill
34,698 
48,032 
Other intangible assets (net of accumulated amortization of $34,464 and $29,515, respectively)
156,617 
162,223 
Other noncurrent assets
44,156 
45,374 
Total assets
3,096,974 
2,853,909 
Current liabilities:
 
 
Accounts payable (including $310,685 and $243,548, respectively, attributable to Rose Rock)
338,720 
273,666 
Payable to affiliates (including $8,952 and $5,033, respectively, attributable to Rose Rock)
9,030 
5,033 
Accrued liabilities (including $23,030 and $22,240, respectively, attributable to Rose Rock)
84,703 
85,047 
Other current liabilities (including $3,609 and $4,246, respectively, attributable to Rose Rock)
11,510 
13,281 
Total current liabilities
443,963 
377,027 
Long-term debt, net (including $774,488 and $732,356, respectively, attributable to Rose Rock)
1,070,363 
1,057,816 
Deferred income taxes
183,776 
200,953 
Other noncurrent liabilities
23,544 
21,757 
Commitments and contingencies (Note 10)
   
   
SemGroup owners’ equity:
 
 
Common stock, $0.01 par value (authorized - 100,000 shares; issued - 53,790 and 44,863 shares, respectively)
526 
439 
Additional paid-in capital
1,411,567 
1,217,255 
Treasury stock, at cost (977 and 931 shares, respectively)
(6,497)
(5,593)
Accumulated deficit
(45,271)
(38,012)
Accumulated other comprehensive loss
(56,080)
(58,562)
Total SemGroup Corporation owners’ equity
1,304,245 
1,115,527 
Noncontrolling interests in consolidated subsidiaries
71,083 
80,829 
Total owners’ equity
1,375,328 
1,196,356 
Total liabilities and owners’ equity
$ 3,096,974 
$ 2,853,909 
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Allowance for doubtful accounts
$ 2,404 
$ 3,019 
Accumulated depreciation
360,513 
319,769 
Accumulated amortization
34,464 
29,515 
Accounts Payable
338,720 
273,666 
Due to Related Parties
9,030 
5,033 
Accrued Liabilities
84,703 
85,047 
Other Liabilities, Current
11,510 
13,281 
Common stock, $0.01 par value
$ 0.01 
$ 0.01 
Common stock shares authorized
100,000 
100,000 
Common stock shares issued
53,790 
44,863 
Treasury stock shares
977 
931 
Variable Interest Entity, Primary Beneficiary [Member]
 
 
Accounts Payable
310,685 
243,548 
Due to Related Parties
8,952 
5,033 
Accrued Liabilities
23,030 
22,240 
Other Liabilities, Current
$ 3,609 
$ 4,246 
Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Revenues:
 
 
 
 
Product
$ 210,126 
$ 288,736 
$ 447,022 
$ 508,867 
Service
62,200 
66,604 
126,273 
128,481 
Other
15,051 
21,886 
28,933 
38,188 
Total revenues
287,377 
377,226 
602,228 
675,536 
Expenses:
 
 
 
 
Costs of products sold, exclusive of depreciation and amortization shown below
176,842 
244,158 
373,789 
436,230 
Operating
54,707 
60,800 
104,899 
113,890 
General and administrative
20,775 
22,917 
41,835 
55,227 
Depreciation and amortization
25,048 
24,674 
49,095 
48,408 
Loss on disposal or impairment, net
(1,685)
(1,372)
(14,992)
(2,430)
Total expenses
279,057 
353,921 
584,610 
656,185 
Earnings from equity method investments
17,078 
23,903 
40,149 
44,462 
Gain (loss) on issuance of common units by equity method investee
0 
5,897 
(41)
5,897 
Operating income
25,398 
53,105 
57,726 
69,710 
Other expenses (income), net:
 
 
 
 
Interest expense
18,875 
16,822 
37,810 
31,413 
Foreign currency transaction loss (gain)
1,543 
(295)
3,012 
(814)
Loss (gain) on sale or impairment of equity method investment
(9,120)
(6,623)
30,644 
(14,517)
Other income, net
(491)
(95)
(678)
(186)
Total other expenses, net
10,807 
9,809 
70,788 
15,896 
Income (loss) from continuing operations before income taxes
14,591 
43,296 
(13,062)
53,814 
Income tax expense (benefit)
4,658 
14,861 
(16,749)
19,603 
Income from continuing operations
9,933 
28,435 
3,687 
34,211 
Loss from discontinued operations, net of income taxes
(2)
(2)
(4)
(2)
Net income
9,931 
28,433 
3,683 
34,209 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Net income (loss) attributable to SemGroup
8,009 
23,297 
(7,259)
24,763 
Other comprehensive income (loss), net of income taxes
6,591 
5,520 
2,482 
(3,540)
Comprehensive income
16,522 
33,953 
6,165 
30,669 
Less: comprehensive income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Comprehensive income (loss) attributable to SemGroup
$ 14,600 
$ 28,817 
$ (4,777)
$ 21,223 
Net income (loss) attributable to SemGroup per common share (Note 12):
 
 
 
 
Basic
$ 0.18 
$ 0.53 
$ (0.16)
$ 0.57 
Diluted
$ 0.18 
$ 0.53 
$ (0.16)
$ 0.56 
Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:
 
 
Net income
$ 3,683 
$ 34,209 
Adjustments to reconcile net income to net cash provided by operating activities:
 
 
Net unrealized loss (gain) related to derivative instruments
(71)
1,230 
Depreciation and amortization
49,095 
48,408 
Loss on disposal or impairment, net
14,992 
2,430 
Earnings from equity method investments
(40,149)
(44,462)
Loss (gain) on issuance of common units by equity method investee
41 
(5,897)
Loss (gain) on sale or impairment of equity method investment
30,644 
(14,517)
Distributions from equity investments
42,790 
48,031 
Amortization of debt issuance costs
2,790 
2,314 
Deferred tax expense (benefit)
(18,486)
12,791 
Non-cash equity compensation
5,509 
6,204 
Provision for uncollectible accounts receivable, net of recoveries
(589)
(309)
Currency loss (gain)
3,012 
(814)
Inventory valuation adjustment
0 
1,235 
Changes in operating assets and liabilities (Note 13)
(19,346)
(17,896)
Net cash provided by operating activities
73,915 
72,957 
Cash flows from investing activities:
 
 
Capital expenditures
(126,712)
(236,956)
Proceeds from sale of long-lived assets
114 
230 
Contributions to equity method investments
(3,448)
(23,461)
Proceeds from sale of common units of equity method investee
60,483 
56,318 
Distributions in excess of equity in earnings of affiliates
13,778 
13,077 
Net cash used in investing activities
(55,785)
(190,792)
Cash flows from financing activities:
 
 
Debt issuance costs
0 
(6,289)
Borrowings on credit facilities and issuance of senior secured notes, net of discount
283,500 
802,208 
Principal payments on credit facilities and other obligations
(272,881)
(525,024)
Proceeds from Issuance of Common Stock
228,546 
0 
Rose Rock Midstream, L.P. equity issuance
0 
89,119 
Distributions to noncontrolling interests
(21,485)
(19,261)
Repurchase of common stock for payment of statutory taxes due on equity-based compensation
(904)
(4,254)
Dividends paid
(39,720)
(31,478)
Proceeds from issuance of common stock under employee stock purchase plan
555 
609 
Net cash provided by financing activities
177,611 
305,630 
Effect of exchange rate changes on cash and cash equivalents
1,943 
390 
Change in cash and cash equivalents
197,684 
188,185 
Cash and cash equivalents at beginning of period
58,096 
40,598 
Cash and cash equivalents at end of period
$ 255,780 
$ 228,783 
Overview
OVERVIEW
OVERVIEW
SemGroup Corporation is a Delaware corporation headquartered in Tulsa, Oklahoma. The terms "we," "our," "us," "SemGroup," "the Company" and similar language used in these notes to the unaudited condensed consolidated financial statements refer to SemGroup Corporation and its subsidiaries.
Basis of presentation
The accompanying condensed consolidated balance sheet at December 31, 2015, which is derived from audited financial statements, and the unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States and the rules and regulations of the Securities and Exchange Commission ("SEC"). These financial statements include all normal and recurring adjustments that, in the opinion of management, are necessary to present fairly the financial position of the Company and the results of its operations and its cash flows.
Our condensed consolidated financial statements include the accounts of our controlled subsidiaries. All significant transactions between our consolidated subsidiaries have been eliminated.
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts and disclosures in the financial statements. Although management believes these estimates are reasonable, actual results could differ materially from these estimates. The results of operations for the three months and six months ended June 30, 2016, are not necessarily indicative of the results to be expected for the full year ending December 31, 2016.
Pursuant to the rules and regulations of the SEC, the accompanying condensed consolidated financial statements do not include all of the information and notes normally included with financial statements prepared in accordance with accounting principles generally accepted in the United States. Certain reclassifications have been made to conform previously reported balances to the current presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2015, which are included in our Annual Report on Form 10-K for the year ended December 31, 2015, filed with the SEC.
Our significant accounting policies are consistent with those described in our Annual Report on Form 10-K for the year ended December 31, 2015.
Recent accounting pronouncements
In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduces new guidance for estimating credit losses on certain types of financial instruments based on expected losses and the timing of the recognition of such losses. For public entities, this ASU is effective for annual periods beginning after December 15, 2019, and interim periods within those years and early adoption is permitted in the year prior to the effective date. We will adopt this guidance in the first quarter of 2020. The impact is not expected to be material.
In March 2016, the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting'', which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material.
In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which amends the existing lease guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by operating and finance leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the income statement and statement of cash flows. For public entities, this ASU will be effective for annual periods beginning after December 15, 2018, and interim periods within those years. The new guidance shall be applied using a modified retrospective approach and early adoption is permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements. We will adopt this guidance in the first quarter of 2019.
In November 2015, the FASB issued ASU 2015-17, "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes", which requires all deferred tax assets and liabilities to be classified as noncurrent in the statement of financial position. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years. The new guidance may be applied prospectively or retrospectively and early adoption is permitted. We have not determined which method we will apply when we adopt the standard. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material.
In July 2015, the FASB issued ASU 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory", which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value rather than the lower of cost or market. The standard will be effective for public business entities for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The new guidance shall be applied prospectively and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material.
In April 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs”, which is designed to simplify presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU 2015-15, “Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting,” which amended the SEC paragraphs of ASC Subtopic 835-30 to include the language from the SEC Staff Announcement indicating that the SEC would not object to presenting deferred debt issuance costs related to line-of-credit agreements as assets and subsequently amortizing the deferred debt issuance costs ratably over the term of the agreement. The standards are effective for U.S. public companies for annual reporting periods beginning after December 15, 2015. The new guidance has been applied on a retrospective basis for all periods presented. We adopted this guidance in the first quarter of 2016. The impact was not material. For presentation purposes, $16.8 million of debt issuance costs which had previously been reported as other noncurrent assets were reclassified as a reduction of long-term debt on the December 31, 2015 balance sheet. Capitalized loan fees related to our revolving credit facilities continue to be presented as other noncurrent assets.
In February 2015, the FASB issued ASU 2015-02, “Consolidation (Topic 810): Amendments to the Consolidation Analysis,” which adds requirements that limited partnerships must meet to qualify as voting interest entities and modifies the evaluation of whether limited partnerships are variable interest entities or voting interest entities. It also eliminates the presumption that a general partner should consolidate a limited partnership. This guidance is effective for public companies for fiscal years beginning after December 15, 2015. We adopted this guidance in the first quarter of 2016. The impact was not material.
In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers," which supersedes nearly all existing revenue recognition guidance under accounting principles generally accepted in the United States ("U.S. GAAP"). The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard permits using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08 which amended the principal-versus-agent implementation guidance set forth in ASU 2014-09. Among other things, ASU 2016-08 clarifies that an entity should evaluate whether it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU 2016-10 which amended certain aspects of the guidance related to identifying performance obligations and licensing implementation within ASU 2014-09. In June 2016, the FASB issued ASU 2016-12 which narrows the scope around certain aspects of the criterion used in determining when to recognize revenue. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard. We will adopt this guidance in the first quarter of 2018.
Rose Rock Midstream, L.P.
ROSE ROCK MIDSTREAM, L.P.
ROSE ROCK MIDSTREAM, L.P.
We control the operations of our consolidated subsidiary, Rose Rock Midstream, L.P. (NYSE: RRMS) ("Rose Rock"), through our ownership of the general partner interest. As of June 30, 2016, we own the 2% general partner interest and a 55.1% limited partner interest. Subsequent to the adoption of ASU 2015-02, Rose Rock is considered to be a variable interest entity due to the limited partners' lack of substantive kick-out rights or substantive participating rights. We will continue to consolidate Rose Rock as we are the primary beneficiary due to our general partner interest, majority limited partner interest and incentive distribution rights.
Rose Rock's assets are pledged as collateral under its senior secured revolving credit facility agreement. The credit agreement restricts Rose Rock’s ability to make certain types of payments relating to its units, including the declaration or payment of cash distributions; provided that Rose Rock may make quarterly distributions of available cash so long as no default under the agreement then exists or would result therefrom. The agreement is guaranteed by all of Rose Rock’s material domestic subsidiaries and secured by a lien on substantially all of the property and assets of Rose Rock and the guarantors, subject to customary exceptions. Rose Rock's creditors have no recourse to the credit of SemGroup.
Cash distributions
We receive distributions from Rose Rock on our common units, our 2% general partner interest and incentive distribution rights. Rose Rock intends to pay a minimum quarterly distribution of $0.3625 per unit, to the extent it has sufficient available cash, as defined in Rose Rock’s partnership agreement.  
The following table shows the cash distributions paid or declared during 2016 and 2015 (in thousands, except for per unit amounts):
 
Distribution
Per Unit
 
Distributions Paid/To Be Paid
Quarter Ended
SemGroup
Noncontrolling
Interest
Common Units
Total
Distributions
General
Partner
Incentive
Distributions
Common
Units
Subordinated
Units
December 31, 2014
$
0.6200

 
$
485

$
3,487

$
6,551

$
5,202

$
8,544

$
24,269

March 31, 2015
$
0.6350

 
$
568

$
4,450

$
13,148

$
—

$
10,213

$
28,379

June 30, 2015
$
0.6500

 
$
590

$
4,979

$
13,458

$
—

$
10,456

$
29,483

September 30, 2015
$
0.6600

 
$
604

$
5,333

$
13,665

$
—

$
10,619

$
30,221

December 31, 2015
$
0.6600

 
$
604

$
5,333

$
13,665

$
—

$
10,622

$
30,224

March 31, 2016
$
0.6600

 
$
605

$
5,338

$
13,665

$
—

$
10,643

$
30,251

June 30, 2016
$
0.6600

*
$
605

$
5,339

$
13,665

$
—

$
10,648

$
30,257


*Expected distributions related to the quarter ended June 30, 2016, which will be paid on August 12, 2016 to unitholders of record as of August 2, 2016.

Summarized financial information
Certain summarized balance sheet information of Rose Rock is shown below (in thousands):
 
(Unaudited)
 
 
 
June 30,
2016
 
December 31,
2015
Cash
$
7,909

 
$
9,059

Other current assets
413,625

 
310,555

Property, plant and equipment, net
443,327

 
441,596

Equity method investments
427,961

 
438,291

Goodwill
26,628

 
26,628

Other noncurrent assets, net
17,978

 
19,461

Total assets
$
1,337,428

 
$
1,245,590

 
 
 
 
Current liabilities
$
356,248

 
$
283,029

Long-term debt
774,488

 
732,356

Partners’ capital attributable to SemGroup
135,609

 
149,376

Partners’ capital attributable to noncontrolling interests
71,083

 
80,829

Total liabilities and partners' capital
$
1,337,428

 
$
1,245,590


Certain summarized income statement information of Rose Rock for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenue
$
169,144

 
$
223,303

 
$
373,095

 
$
357,996

Cost of products sold
$
128,763

 
$
173,133

 
$
280,154

 
$
269,370

Operating, general and administrative expenses
$
26,868

 
$
29,985

 
$
53,469

 
$
56,556

Depreciation and amortization expense
$
8,235

 
$
10,608

 
$
16,128

 
$
20,751

Earnings from equity method investments
$
17,078

 
$
17,683

 
$
37,917

 
$
38,547

Net income
$
9,922

 
$
17,068

 
$
36,390

 
$
31,668


Pending acquisition of outstanding common units
On May 30, 2016, SemGroup entered into an Agreement and Plan of Merger (the "Merger Agreement") with Rose Rock whereby SemGroup would acquire all of the outstanding common limited partner units of Rose Rock not already beneficially owned by SemGroup in exchange for shares of SemGroup Class A common stock. Each common limited partner unit of Rose Rock would be acquired in exchange for 0.8136 shares of SemGroup Class A common stock. Subsequent to the transaction, Rose Rock would be wholly owned by SemGroup or would be merged into SemGroup.
If completed, the merger will be accounted for in accordance with FASB Accounting Standards Codification 810, Consolidation - Overall - Changes in a Parent’s Ownership Interest in a Subsidiary. As SemGroup controls Rose Rock and will continue to control Rose Rock after the merger, the changes in SemGroup’s ownership interest in Rose Rock will be accounted for as an equity transaction and no gain or loss will be recognized in SemGroup’s consolidated statements of operations and comprehensive income (loss) as a result of the merger.
Completion of the merger is conditioned upon, among other things: (i) majority approval of Rose Rock common unitholders; (ii) all material required governmental consents and approvals having been received; (iii) the absence of legal injunctions or impediments prohibiting the transactions contemplated by the Merger Agreement; (iv) the effectiveness of a registration statement on Form S-4 with respect to the issuance of SemGroup Class A common stock to be issued in exchange for Rose Rock common limited partner units; (v) approval of the listing on the New York Stock Exchange, subject to official notice of issuance, of the SemGroup Class A common stock to be issued; and (vi) majority approval by SemGroup stockholders of the SemGroup Class A common stock issuance.
A subsidiary of SemGroup which beneficially owns a majority of Rose Rock's common units has agreed to deliver a written consent approving the Merger Agreement and the transactions contemplated by such agreement.
The Merger Agreement provides for certain termination rights for Rose Rock. The Merger Agreement provides that upon termination of the Merger Agreement (i) in connection with the failure of the stockholders of SemGroup to approve the SemGroup stock issuance, SemGroup will pay Rose Rock's out-of-pocket expenses in an amount up to $3.8 million and (ii) in connection with a change by SemGroup of its recommendation in favor of approval of the SemGroup stock issuance under certain circumstances, SemGroup will pay to Rose Rock a termination fee in the amount of $15.5 million. Under no circumstance will SemGroup be required to both reimburse Rose Rock's expenses and pay Rose Rock the termination fee.
Rose Rock’s currently outstanding senior notes will remain outstanding after the merger is consummated, and no “change of control” will occur thereunder. It is currently contemplated that SemGroup and its subsidiaries that currently are guarantors of SemGroup’s outstanding senior notes will provide guaranties of Rose Rock’s senior notes once the merger is consummated. In addition, it is currently contemplated that Rose Rock and its subsidiaries that currently are guarantors of Rose Rock’s outstanding senior notes will provide guaranties of SemGroup’s senior notes and secured revolving credit facility once the merger is consummated. In connection with the consummation of the merger, Rose Rock’s existing senior secured revolving credit facility is contemplated to be terminated and SemGroup’s senior secured revolving credit facility is contemplated to be amended and upsized to cover the needs of the combined company. SemGroup is currently considering consummating certain internal “clean-up” mergers after the merger occurs, which would ultimately result in Rose Rock merging into SemGroup, with SemGroup being the surviving entity of that merger. If SemGroup determines to consummate these internal mergers after the merger occurs, SemGroup, upon consummation of these internal mergers, would directly assume and become the successor issuer of Rose Rock’s outstanding senior notes.
Equity Method Investments
EQUITY METHOD INVESTMENTS
EQUITY METHOD INVESTMENTS

Our equity method investments consisted of the following (in thousands):
 
June 30, 2016
 
December 31, 2015
White Cliffs Pipeline, L.L.C.
$
290,668

 
$
297,109

NGL Energy Partners LP
18,977

 
112,787

Glass Mountain Pipeline, LLC
137,293

 
141,182

Total equity method investments
$
446,938

 
$
551,078


    
Our earnings from equity method investments consisted of the following (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
White Cliffs Pipeline, L.L.C.
$
16,428

 
$
15,545

 
$
36,208

 
$
34,635

NGL Energy Partners LP(1)
—

 
6,220

 
2,232

 
5,915

Glass Mountain Pipeline, LLC
650

 
2,138

 
1,709

 
3,912

Total earnings from equity method investments
$
17,078

 
$
23,903

 
$
40,149

 
$
44,462


(1) Excluding loss on issuance of common units of $41.0 thousand for the six months ended June 30, 2016 and a gain on the issuance of common units of $5.9 million for the three and six months ended June 30, 2015. Additionally, gains and losses on the disposal or impairment of equity investments are not reported within "earnings from equity method investments" in the condensed consolidated statements of operations and comprehensive income (loss).
Cash distributions received from equity method investments consisted of the following (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
White Cliffs Pipeline, L.L.C.
$
21,664

 
$
20,551

 
$
45,762

 
$
44,705

NGL Energy Partners LP
—

 
4,468

 
4,873

 
9,483

Glass Mountain Pipeline, LLC
3,118

 
5,009

 
5,933

 
6,920

Total cash distributions received from equity method investments
$
24,782

 
$
30,028

 
$
56,568

 
$
61,108


White Cliffs Pipeline, L.L.C.
Certain unaudited summarized income statement information of White Cliffs Pipeline, L.L.C. ("White Cliffs") for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenue
$
55,586

 
$
48,509

 
$
113,642

 
$
103,123

Cost of products sold
$
2,803

 
$
169

 
$
3,053

 
$
1,102

Operating, general and administrative expenses
$
10,125

 
$
8,876

 
$
19,727

 
$
16,296

Depreciation and amortization expense
$
10,084

 
$
8,587

 
$
19,047

 
$
17,125

Net income
$
32,575

 
$
30,870

 
$
71,822

 
$
68,593


The equity in earnings of White Cliffs for the three months and six months ended June 30, 2016 and 2015 is less than 51% of the net income of White Cliffs for the same periods. This is due to certain general and administrative expenses we incur in managing the operations of White Cliffs that the other owners are not obligated to share. Such expenses are recorded by White Cliffs and are allocated to our ownership interest. White Cliffs recorded $0.4 million and $0.4 million of such general and administrative expense for the three months ended June 30, 2016 and 2015, respectively. White Cliffs recorded $0.9 million and $0.7 million of such general and administrative expense for the six months ended June 30, 2016 and 2015, respectively.
The members of White Cliffs are required to contribute capital to White Cliffs to fund various projects. For the six months ended June 30, 2016, we contributed $2.2 million for an expansion project that added approximately 65,000 barrels per day of capacity.
NGL Energy Partners LP
At June 30, 2016, we no longer own common units representing limited partner interests in NGL Energy Partners LP (NYSE: NGL) ("NGL Energy"). On April 27, 2016, we sold all of our NGL Energy limited partner units for $13.00 per unit and recorded a $9.1 million gain on disposal. We continue to hold an 11.78% interest in the general partner of NGL Energy which is being accounted for under the equity method in accordance ASC 323-30-S99-1, as our ownership is in excess of the 3 to 5 percent interest which is generally considered to be more than minor.
The general partner of NGL Energy is not a publicly traded company. The information below pertains to our limited partner and general partner investments in NGL Energy.
See Note 4 for discussion of the other-than-temporary impairment of our common unit investment in NGL Energy.
Under the equity method, our policy is to record our equity in earnings of NGL Energy on a one-quarter lag, as we do not expect to have information on the earnings of NGL Energy in time to consistently record the earnings in the quarter in which they are generated.
During the three months ended December 31, 2015, NGL issued common units which diluted our limited partnership interest. As we record activity on a one-quarter lag, we recognized a non-cash loss of $41.0 thousand associated with these issuances for the six months ended June 30, 2016. In the first quarter of 2015, NGL announced several transactions in which they issued common units publicly and privately which diluted our limited partnership interest. As we record activity on a one-quarter lag, we recognized a non-cash gain of $5.9 million associated with these issuances in the second quarter of 2015.
During the six months ended June 30, 2015, we sold 1,999,533 of our NGL Energy common units for $56.3 million, net of related costs of $0.5 million. We recorded net gains related to these sales of $6.6 million and $14.5 million in "other expense (income)" in our condensed consolidated statements of operations and comprehensive income (loss) for the three months and six months ended June 30, 2015.
Certain unaudited summarized income statement information of NGL Energy for the three months and six months ended March 31, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended March 31,
 
Six Months Ended March 31,
 
2016
 
2015
 
2016
 
2015
Revenue
$
2,325,440

 
$
3,220,771

 
$
5,010,446

 
$
7,772,917

Cost of sales
$
2,077,160

 
$
2,933,021

 
$
4,510,660

 
$
7,244,689

Operating, general and administrative expenses
$
399,373

 
$
151,793

 
$
509,145

 
$
323,857

Depreciation and amortization expense
$
53,152

 
$
54,140

 
$
112,332

 
$
104,475

Net income (loss)
$
(206,985
)
 
$
90,942

 
$
(155,990
)
 
$
85,673

 
Glass Mountain Pipeline, LLC
We own a 50% interest in Glass Mountain Pipeline, LLC ("Glass Mountain"), which we account for under the equity method. The excess of the recorded amount of our investment over the book value of our share of the underlying net assets represents equity method goodwill and capitalized interest at June 30, 2016. Capitalized interest is amortized as a reduction of earnings from equity method investments.
Certain unaudited summarized income statement information of Glass Mountain for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenue
$
6,898

 
$
9,788

 
$
15,470

 
$
20,909

Cost of sales
$
(120
)
 
$
(40
)
 
$
445

 
$
1,974

Operating, general and administrative expenses
$
1,618

 
$
1,513

 
$
3,463

 
$
2,920

Depreciation and amortization expense
$
3,989

 
$
3,932

 
$
7,925

 
$
7,976

Net income
$
1,407

 
$
4,381

 
$
3,632

 
$
8,036


The equity in earnings of Glass Mountain for the three months and six months ended June 30, 2016 and 2015 reported in our condensed consolidated statement of operations and comprehensive income (loss) is less than 50% of the net income of Glass Mountain for the same period due to amortization of capitalized interest for the period.
For the six months ended June 30, 2016, we contributed $0.3 million to Glass Mountain related to capital projects.
Impairments
Asset Impairment Charges [Text Block]
IMPAIRMENTS
SemGas goodwill impairment

In March 2016, our SemGas segment revised the volume forecast for its northern Oklahoma system based on revised volume forecasts provided by certain producers who have chosen to adjust plans for production following release of the Oklahoma Corporation Commission’s Regional Earthquake Response Plan that curtails the amount of volume that can be injected into disposal wells.  
Based on the reduction to our forecast, we tested our SemGas segment's long-lived assets, finite-lived intangible assets and goodwill for impairment at March 31, 2016. No impairment was indicated for SemGas' long-lived assets and finite-lived intangible assets based on an undiscounted cash flow analysis. However, we did record an impairment of SemGas' goodwill for the entire balance of $13.1 million.
To test the goodwill for impairment, we used an income approach, supplemented by a market approach to calculate the fair value of the reporting unit. Under the income approach, we utilized a discounted cash flow model to determine the fair value of our SemGas operations. Significant judgments and assumptions included the discount rate, anticipated revenue and volume growth rates, estimated operating expenses and capital expenditures, which were based on our operating and capital budgets as well as our strategic plans. A significant underlying assumption is that commodity prices will eventually improve, water injection issues will be resolved and production volumes will begin to increase. If production does not increase in the future or the production takes longer than anticipated to return, this would negatively affect our key assumptions and potentially lead to finite-lived intangible and long-lived asset impairments in the future. We considered the market approach by comparing the revenue and earnings multiples implied by our income approach to those of comparable companies for reasonableness.
Other-than-temporary impairment of equity method investment in NGL Energy
During the fourth quarter of 2015, the market price of NGL Energy common units fell below our carrying value per unit and remained below our carrying value as of March 31, 2016. At December 31, 2015, in accordance with ASC 320-10-S99 “Investments - Debt and Equity Securities” we assessed whether such decline in value was other-than-temporary. During this initial assessment, the decrease in value was determined not to be other-than-temporary. The evidence management considered in such assessment included the nature and volatility of such decline, as well as the latest public financial guidance, condition, and results of NGL Energy. Subsequently, we continued to monitor events and developments and, based on NGL Energy's April 21, 2016 announcement of a reduction in its quarterly distribution and lowering of financial performance guidance for the most recent quarter, we concluded that the decline in the value of our investment is other-than-temporary as of March 31, 2016. As such, we recorded an impairment of $39.8 million to our investment in the limited partner units of NGL Energy for the six months ended June 30, 2016. The value of our limited partner investment in NGL Energy was written-down to the market price of $11.04 on December 31, 2015, the date through which we have recorded our equity in earnings as discussed in Note 3. See Note 3 for discussion of the sale of our NGL Energy limited partner units on April 27, 2016.
Our investment in the general partner of NGL Energy is not considered to be impaired. There is no readily available market price for our general partner investment as these units are not publicly traded. Based on the relatively low book value of our general partner investment, the value of incentive distribution rights and comparable general partner transactions, we do not believe our investment in the general partner of NGL Energy is impaired.
Segments
SEGMENTS
SEGMENTS
Our businesses are organized based on the nature and location of the services they provide. Certain summarized information related to our reportable segments is shown in the tables below. None of the operating segments have been aggregated. Although Corporate and Other does not represent an operating segment, it is included in the tables below to reconcile segment information to that of the consolidated Company. Eliminations of transactions between segments are also included within Corporate and Other in the tables below.
The accounting policies of each segment are the same as the accounting policies of the consolidated Company. Transactions between segments are generally recorded based on prices negotiated between the segments. Certain general and administrative expenses incurred at the corporate level were allocated to the segments based on our allocation policies in effect at the time.
Our equity investment in NGL Energy was previously included within the SemStream segment. However, in the second quarter of 2016, we disposed of our limited partner interest in NGL Energy. Subsequent to this disposal, amounts related to our remaining general partner investment in NGL Energy are not material and are not expected to be material for the foreseeable future. As our investment in NGL Energy is the only asset of SemStream, we have ceased to report SemStream as a segment. Prior period amounts have been recast to include the former SemStream balances as part of Corporate and Other. See Note 3 for additional information.
During the year ended December 31, 2015, management made the decision to disaggregate certain activities and functions within the domestic crude oil business to provide additional granularity, both internally and externally, to our operating results. As such, the prior period results of the former Crude segment have been recast to reflect the resulting reportable segments: Crude Transportation, Crude Facilities and Crude Supply and Logistics. Certain amounts formerly included in the Crude segment have been included in Corporate and Other in the current presentation. No other segments were impacted. Additionally, current year activity includes intersegment revenues generated by our Crude Transportation and Crude Facilities segments for services provided to our Crude Supply and Logistics segment. With the exception of intersegment trucking revenues of our Crude Transportation segment, these intersegment charges did not exist in the prior year.
Our results by segment are presented in the tables below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenues:
 
 
 
 
 
 
 
   Crude Transportation
 
 
 
 
 
 
 
External
$
15,643

 
$
22,425

 
$
32,839

 
$
42,752

Intersegment
5,128

 
3,562

 
12,341

 
7,283

   Crude Facilities
 
 
 
 
 
 
 
External
10,300

 
11,402

 
20,433

 
22,807

Intersegment
2,526

 
—

 
5,272

 
—

   Crude Supply and Logistics
 
 
 
 
 
 
 
External
143,201

 
189,476

 
319,823

 
292,437

   SemGas
 
 
 
 
 
 
 
External
48,200

 
60,270

 
91,720

 
120,546

Intersegment
2,521

 
6,451

 
5,267

 
12,432

   SemCAMS
 
 
 
 
 
 
 
External
33,815

 
35,915

 
64,681

 
65,639

   SemLogistics
 
 
 
 
 
 
 
External
5,932

 
6,279

 
12,312

 
11,431

   SemMexico
 
 
 
 
 
 
 
External
30,286

 
51,459

 
60,420

 
112,949

   Corporate and Other
 
 
 
 
 
 
 
External
—

 
—

 
—

 
6,975

Intersegment
(10,175
)
 
(10,013
)

(22,880
)

(19,715
)
Total Revenues
$
287,377


$
377,226


$
602,228


$
675,536

 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Earnings from equity method investments:
 
 
 
 
 
 
 
   Crude Transportation
$
17,078

 
$
17,683

 
$
37,917

 
$
38,547

   Corporate and Other(1)
—

 
12,117

 
2,191

 
11,812

Total earnings from equity method investments
$
17,078

 
$
29,800


$
40,108


$
50,359

(1) Includes historical earnings from equity method investments including gain (loss) on issuance of common units by equity method investee related to our investment in NGL Energy. Gains and losses on the disposal or impairment of equity investments are not reported within "earnings from equity method investments" in the condensed consolidated statements of operations and comprehensive income (loss). See Note 3 for additional information.
 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Depreciation and amortization:
 
 
 
 
 
 
 
   Crude Transportation
$
6,171

 
$
9,038

 
$
12,030

 
$
17,656

   Crude Facilities
1,921

 
1,406

 
3,805

 
2,775

   Crude Supply and Logistics
40

 
40

 
80

 
79

   SemGas
9,194

 
7,359

 
18,116

 
14,497

   SemCAMS
4,294

 
3,187

 
8,245

 
6,253

   SemLogistics
1,983

 
2,154

 
3,943

 
4,194

   SemMexico
949

 
1,037

 
1,890

 
2,090

   Corporate and Other
496

 
453

 
986

 
864

Total depreciation and amortization
$
25,048


$
24,674


$
49,095


$
48,408

 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Income tax expense (benefit):
 
 
 
 
 
 
 
SemCAMS
$
451

 
$
616

 
$
1,416

 
$
1,167

SemLogistics
(273
)
 
167

 
(214
)
 
(202
)
SemMexico
194

 
764

 
801

 
1,754

Corporate and Other
4,286

 
13,314

 
(18,752
)
 
16,884

Total income tax expense (benefit)
$
4,658


$
14,861


$
(16,749
)

$
19,603

 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Segment profit (1):
 
 
 
 
 
 
 
   Crude Transportation
$
18,161

 
$
19,983

 
$
43,579

 
$
44,507

   Crude Facilities
9,371

 
7,963

 
18,958

 
16,365

   Crude Supply and Logistics
10,069

 
10,978

 
19,162

 
16,159

   SemGas
12,304

 
17,671

 
11,312

 
32,551

   SemCAMS
9,000

 
7,981

 
18,904

 
15,866

   SemLogistics
2,002

 
1,992

 
4,661

 
2,853

   SemMexico
2,024

 
5,056

 
4,342

 
10,179

   Corporate and Other(2)
(8,008
)
 
4,740

 
(14,168
)
 
(19,132
)
Total segment profit
$
54,923


$
76,364


$
106,750


$
119,348

(1) Segment profit represents revenues excluding unrealized gains (losses) related to derivative instruments plus earnings from equity method investments less cost of sales excluding depreciation and amortization and less operating and general and administrative expenses.
(2) Corporate and Other includes amounts previously included in the SemStream segment which ceased to be a reportable segment in the second quarter of 2016. See Note 3 for additional information.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Reconciliation of segment profit to net income:
 
 
 
 
 
 
 
   Total segment profit
$
54,923


$
76,364


$
106,750


$
119,348

     Less:
 
 
 
 
 
 
 
Net unrealized loss (gain) related to derivative instruments
4,477

 
(1,415
)
 
(71
)
 
1,230

Depreciation and amortization
25,048


24,674


49,095


48,408

Interest expense
18,875

 
16,822

 
37,810

 
31,413

Foreign currency transaction loss (gain)
1,543

 
(295
)
 
3,012

 
(814
)
Loss (gain) on sale or impairment of equity method investment
(9,120
)
 
(6,623
)
 
30,644

 
(14,517
)
Other income, net
(491
)
 
(95
)
 
(678
)
 
(186
)
Income tax expense
4,658

 
14,861

 
(16,749
)
 
19,603

Loss from discontinued operations, net of taxes
2

 
2

 
4

 
2

   Net income
$
9,931


$
28,433


$
3,683


$
34,209

 
 
 
 
 
 
 
 
 
 
 
 
 
June 30,
2016
 
December 31,
2015
Total assets (excluding intersegment receivables):
 
 
 
 
 
 
 
   Crude Transportation
 
 
 
 
$
931,362

 
$
877,017

   Crude Facilities
 
 
 
 
154,359

 
155,186

   Crude Supply and Logistics
 
 
 
 
430,297

 
328,419

   SemGas
 
 
 
 
691,823

 
719,789

   SemCAMS
 
 
 
 
376,586

 
331,749

   SemLogistics
 
 
 
 
143,648

 
155,794

   SemMexico
 
 
 
 
86,073

 
89,608

   Corporate and Other(1)
 
 
 
 
282,826

 
196,347

Total
 
 
 
 
$
3,096,974


$
2,853,909

(1) Corporate and Other includes amounts previously included in the SemStream segment which ceased to be a reportable segment in the second quarter of 2016. See Note 3 for additional information.
 
 
 
 
 
 
 
 
 
 
 
 
 
June 30,
2016
 
December 31,
2015
Equity investments:
 
 
 
 
 
 
 
   Crude Transportation
 
 
 
 
$
427,961

 
$
438,291

   Corporate and Other(1)
 
 
 
 
18,977

 
112,787

Total equity investments
 
 
 
 
$
446,938


$
551,078

(1) Corporate and Other includes amounts previously included in the SemStream segment which ceased to be a reportable segment in the second quarter of 2016. See Note 3 for additional information.
Inventories
Inventories
INVENTORIES
Inventories consist of the following (in thousands):
 
June 30,
2016
 
December 31,
2015
Crude oil
$
76,343

 
$
59,121

Asphalt and other
9,117

 
11,118

Total inventories
$
85,460

 
$
70,239



At June 30, 2015, our Crude Supply and Logistics segment recorded non-cash charges of $1.2 million to write-down crude oil inventory to the lower of cost or market. A lower of cost or market adjustment was not necessary at June 30, 2016.
Financial Instruments
FINANCIAL INSTRUMENTS
FINANCIAL INSTRUMENTS
Fair value of financial instruments
We record certain financial assets and liabilities at fair value at each balance sheet date. The tables below summarize the balances of commodity derivative assets and liabilities at June 30, 2016 and December 31, 2015 (in thousands):

 
June 30, 2016
 
December 31, 2015
Derivatives subject to netting arrangements:
Level 1
 
Netting*
 
Total
 
Level 1
 
Netting*
 
Total
Commodity derivatives:
 
 
 
 

 
 
 
 
 

Assets
$
1,160

 
$
(1,160
)
 
$
—

 
$
131

 
$
(131
)
 
$
—

Liabilities
$
1,428

 
$
(1,160
)
 
$
268

 
$
470

 
$
(131
)
 
$
339

*Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.
"Level 1" measurements are based on inputs consisting of unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. These include commodity futures contracts that are traded on an exchange.
"Level 2" measurements are based on inputs consisting of market observable and corroborated prices for similar derivative contracts. Assets and liabilities classified as Level 2 include over the counter ("OTC") traded physical fixed priced purchases and sales forward contracts.
"Level 3" measurements are based on inputs from a pricing service and/or internal valuation models incorporating observable and unobservable market data. These include commodity derivatives, such as forwards and swaps for which there is not a highly liquid market and therefore are not included in Level 2 above.
Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the measurement requires judgment and may affect the valuation of assets and liabilities and their placement within the fair value levels. At June 30, 2016, all of our physical fixed price forward purchases and sales contracts were being accounted for as normal purchases and normal sales.
There were no financial assets or liabilities recorded at fair value which were classified as Level 2 or Level 3 during the three months and six months ended June 30, 2016 and 2015. As such, no rollforward of Level 3 activity has been presented.
Commodity derivative contracts
Our consolidated results of operations and cash flows are impacted by changes in market prices for petroleum products. This exposure to commodity price risk is managed, in part, by entering into various commodity derivatives.
We seek to manage the price risk associated with our marketing operations by limiting our net open positions through (i) the concurrent purchase and sale of like quantities of petroleum products to create back-to-back transactions that are intended to lock in positive margins based on the timing, location or quality of the petroleum products purchased and delivered or (ii) derivative contracts. Our storage and transportation assets can also be used to mitigate time and location basis risks, respectively. All marketing activities are subject to our Comprehensive Risk Management Policy, which establishes limits in order to manage risk and mitigate financial exposure.
Our commodity derivatives can be comprised of swaps, futures contracts and forward contracts of crude oil, natural gas and natural gas liquids. These are defined as follows:
Swaps – OTC transactions where a floating price, basis or index is exchanged for a fixed (or a different floating) price, basis or index at a preset schedule in the future, according to an agreed-upon formula.
Futures contracts – Exchange traded contracts to buy or sell a commodity. These contracts are standardized by the exchange in terms of quality, quantity, delivery period and location for each commodity.
Forward contracts – OTC contracts to buy or sell a commodity at an agreed upon future date. The buyer and seller agree on specific terms (price, quantity, delivery period and location) and conditions at the inception of the contract.
The following table sets forth the notional quantities for commodity derivative instruments entered into (in thousands of barrels):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Sales
5,890

 
7,721

 
16,310

 
13,452

Purchases
5,743

 
7,508

 
16,253

 
13,413


We have not designated any of our commodity derivative instruments as accounting hedges. We have recorded the fair value of our commodity derivative instruments on our condensed consolidated balance sheets in other current assets and other current liabilities in the following amounts (in thousands):
 
June 30, 2016
 
December 31, 2015
 
Assets
 
Liabilities
 
Assets
 
Liabilities
Commodity contracts
$
—

 
$
268

 
$
—

 
$
339


We have posted margin deposits as collateral with brokers who have the right of set off associated with these funds. At June 30, 2016 and December 31, 2015, our margin deposit balances were in a net asset position of $5.1 million and $2.9 million, respectively. These margin account balances have not been offset against our net commodity derivative instrument (contract) positions. Had these margin deposits been netted against our net commodity derivative instrument (contract) positions as of June 30, 2016 and December 31, 2015, we would have had net asset positions of $4.8 million and $2.6 million, respectively.
Realized and unrealized gains (losses) from our commodity derivatives were recorded to product revenue in the following amounts (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Commodity contracts
$
(7,127
)
 
$
(2,202
)
 
$
(3,773
)
 
$
(2,268
)

Concentrations of risk
During the three months ended June 30, 2016, one customer of our Crude Supply and Logistics segment accounted for more than 10% of our consolidated revenues at approximately 30%. No suppliers accounted for more than 10% of our costs of products sold.
During the six months ended June 30, 2016, one customer of our Crude Supply and Logistics segment accounted for more than 10% of our consolidated revenues at approximately 33%. We purchased approximately $39.5 million of product from one third-party supplier of our Crude Supply and Logistics segment, which represented approximately 11% of our costs of products sold.
At June 30, 2016, two third-party customers, primarily of our Crude Supply and Logistics segment, accounted for approximately 42% of our consolidated accounts receivable.
Income Taxes
INCOME TAXES
INCOME TAXES
The effective tax rate was 32% and 34% for the three months ended June 30, 2016 and 2015 respectively and 128% and 36% for the six months ended June 30, 2016 and 2015, respectively. Significant items that impacted the effective tax rate for each period, as compared to the U.S. federal statutory rate of 35%, include earnings in foreign jurisdictions taxed at lower rates and a non-controlling interest in Rose Rock for which taxes are not provided. Further, the foreign earnings are taxed in foreign jurisdictions as well as in the U.S., since they are disregarded entities for U.S. federal income tax purposes. These combined factors, and the magnitude of the permanent items impacting the tax rate relative to income from continuing operations before income taxes result in rates that are not comparable between the periods.
We have a valuation allowance on a small portion of our state net operating loss carryovers with shorter carryover periods and our foreign tax credit carryover. We have not released the valuation allowance on the foreign tax credits due to the foreign tax credit limitation and the relative subjectivity of forecasts of the relational magnitude of U.S. and foreign taxable income in future periods, as well as the shorter carryover period available for the credits. Deferred tax assets are reduced by a valuation allowance when a determination is made that it is more likely than not that some, or all, of the deferred tax assets will not be realized based on the weight of all available evidence. Evidence which is objectively verifiable carries a higher weight in the analysis. The ultimate realization of deferred tax assets is dependent upon the existence of sufficient taxable income of the appropriate character within the carryback and carryforward period available under the tax law. Sources of taxable income include future reversals of existing taxable temporary differences, future earnings and available tax planning strategies.
We have analyzed filing positions in all of the federal, state and foreign jurisdictions where we are required to file income tax returns and determined that no accruals related to uncertainty in tax positions are required. All income tax years of the Company ending after the emergence from bankruptcy remain open for examination in U.S. jurisdictions under general operation of the statute of limitations, including special provisions with regard to net operating loss carryovers. In foreign jurisdictions, all tax periods prior to the emergence from bankruptcy are closed. The statute of limitations has not been waived with respect to any foreign jurisdictions post emergence and tax periods are open for examination in accordance with the general statutes of each foreign jurisdiction. Currently, there are no examinations in progress for our federal and state jurisdictions. Canada Revenue Agency has initiated an income tax audit of SemCAMS ULC for the tax years 2013 and 2014. No other foreign jurisdictions are currently under audit.
Long-Term Debt
Long-Term Debt
LONG-TERM DEBT
Our long-term debt consisted of the following (in thousands):
 
June 30,
2016
 
December 31,
2015
SemGroup 7.50% senior unsecured notes due 2021
$
300,000

 
$
300,000

Unamortized debt issuance costs on SemGroup notes
(4,125
)
 
(4,540
)
SemGroup 7.50% senior unsecured notes due 2021, net
295,875

 
295,460




 


Rose Rock 5.625% senior unsecured notes due 2022
400,000

 
400,000

Unamortized debt issuance costs on Rose Rock 2022 notes
(6,442
)
 
(6,975
)
Rose Rock 5.625% senior unsecured notes due 2022, net
393,558

 
393,025

 
 
 
 
Rose Rock 5.625% senior unsecured notes due 2023
350,000

 
350,000

Unamortized discount on Rose Rock 2023 notes
(5,178
)
 
(5,455
)
Unamortized debt issuance costs on Rose Rock 2023 notes
(4,931
)
 
(5,266
)
Rose Rock 5.625% senior unsecured notes due 2023, net
339,891

 
339,279

 
 
 
 
SemGroup corporate revolving credit facility
—

 
30,000

Rose Rock revolving credit facility
41,000

 
—

SemMexico revolving credit facility
—

 
—

Capital leases
64

 
83

Total long-term debt, net
1,070,388

 
1,057,847

Less: current portion of long-term debt
25

 
31

Noncurrent portion of long-term debt, net
$
1,070,363

 
$
1,057,816


SemGroup senior unsecured notes due 2021
For the three months ended June 30, 2016 and 2015, we incurred $5.8 million and $5.8 million, respectively, of interest expense related to $300 million of 7.50% senior unsecured notes due 2021 (the "SemGroup Notes") including the amortization of debt issuance costs. For the six months ended June 30, 2016 and 2015, we incurred $11.7 million and $11.7 million, respectively, of interest expense related to the SemGroup Notes including the amortization of debt issuance costs.
SemGroup corporate revolving credit facility
At June 30, 2016, we had no outstanding cash borrowings on our $500 million revolving credit facility.
At June 30, 2016, we had outstanding letters of credit under the facility of $6.0 million, for which the rate in effect was 2.0%.
We incurred interest expense related to the SemGroup revolving credit facility of $1.2 million and $1.0 million for the three months ended June 30, 2016 and 2015, respectively, including letters of credit and amortization of debt issuance costs. We incurred interest expense related to the SemGroup revolving credit facility of $2.6 million and $2.0 million for the six months ended June 30, 2016 and 2015, respectively, including letters of credit and amortization of debt issuance costs.
Rose Rock senior unsecured notes due 2022
At June 30, 2016, Rose Rock had outstanding $400 million of 5.625% senior unsecured notes due 2022 (the "Rose Rock 2022 Notes"). For the three months ended June 30, 2016 and 2015, we incurred $5.9 million and $5.9 million, respectively, of interest expense related to the Rose Rock 2022 Notes including amortization of debt issuance costs. For the six months ended June 30, 2016 and 2015, we incurred $11.7 million and $11.7 million, respectively, of interest expense related to the Rose Rock 2022 Notes including amortization of debt issuance costs.
Rose Rock senior unsecured notes due 2023
At June 30, 2016, Rose Rock had $350 million of 5.625% senior unsecured notes due 2023 (the “Rose Rock 2023 Notes”), which were issued on May 14, 2015. For the three months ended June 30, 2016 and 2015, we incurred $5.2 million and $2.7 million, respectively, of interest expense related to the Rose Rock 2023 Notes including amortization of debt issuance costs. For the six months ended June 30, 2016 and 2015, we incurred $10.4 million and $2.7 million, respectively, of interest expense related to the Rose Rock 2023 Notes including amortization of debt issuance costs.
Rose Rock revolving credit facility
At June 30, 2016, Rose Rock had $41.0 million of outstanding cash borrowings under the $585 million Rose Rock revolving credit facility, which incurred interest at the alternate base rate ("ABR"). At June 30, 2016, the interest rate in effect on ABR borrowings was 5.25%.
At June 30, 2016, Rose Rock had $37.7 million in outstanding letters of credit, and the rate in effect was 2.75%.
Rose Rock had $18.9 million of secured bilateral letters of credit outstanding at June 30, 2016. The interest rate in effect was 1.75%. Secured bilateral letters of credit are external to the facility and do not reduce availability for borrowing on the revolving credit facility.
We incurred $1.6 million and $2.0 million of interest expense related to this facility during the three months ended June 30, 2016 and 2015, respectively, including letters of credit and amortization of debt issuance costs. We incurred $3.1 million and $4.2 million of interest expense related to this facility during the six months ended June 30, 2016 and 2015, respectively, including letters of credit and amortization of debt issuance costs.
SemMexico revolving credit facility
At June 30, 2016, SemMexico had a $100 million Mexican pesos (U.S. $5.4 million at the June 30, 2016 exchange rate) revolving credit facility, which matures in May 2018. There were no outstanding borrowings on the facility at June 30, 2016. Borrowings are unsecured and bear interest at the bank prime rate in Mexico plus 1.50%.
At June 30, 2016, SemMexico had an outstanding letter of credit of $292.8 million Mexican pesos (U.S. $15.8 million at the June 30, 2016 exchange rate). The letter of credit was issued for a fee of 0.25%.
Capitalized interest
During the six months ended June 30, 2016 and 2015, we capitalized interest of $1.6 million and $0.9 million, respectively.
Fair value
We estimate the fair value of the SemGroup Notes, the Rose Rock 2022 Notes and the Rose Rock 2023 Notes to be $290 million, $352 million and $305 million, respectively, at June 30, 2016, based on unadjusted, transacted market prices near the measurement date, which are categorized as Level 2 measurements. We estimate that the fair value of our revolving long-term debt was not materially different than the reported values at June 30, 2016, and is categorized as a Level 2 measurement. It is our belief that neither the market interest rates nor our credit profile have changed significantly enough to have had a material impact on the fair value of our revolving debt outstanding at June 30, 2016.
Commitments and Contingencies
COMMITMENTS AND CONTINGENCIES
COMMITMENTS AND CONTINGENCIES
Bankruptcy matters
On July 22, 2008 (the "Petition Date"), SemGroup, L.P. and certain subsidiaries filed petitions for reorganization under Chapter 11 of the U.S. Bankruptcy Code. Also on July 22, 2008, SemGroup, L.P.'s Canadian subsidiaries filed for creditor protection in Canada. Later during 2008, certain other U.S. subsidiaries filed petitions for reorganization. While in bankruptcy, SemGroup, L.P. filed a plan of reorganization with the court, which was confirmed on October 28, 2009 (the "Plan of Reorganization"). The Plan of Reorganization determined, among other things, how pre-Petition Date obligations would be settled, the equity structure of the reorganized company upon emergence and the financing arrangements upon emergence. SemGroup Corporation emerged from bankruptcy protection on November 30, 2009 (the "Emergence Date").
Claims reconciliation process
A large number of parties made claims against us for obligations alleged to have been incurred prior to our predecessor's bankruptcy filing. We have resolved or settled all of these outstanding claims and have made all required distributions. The Plan of Reorganization has therefore been fully administered. On November 7, 2014, SemGroup Corporation and the other reorganized debtors moved for a final decree from the bankruptcy court closing the debtors’ bankruptcy cases. The United States Bankruptcy Court for the District of Delaware granted the request and entered its Order Granting Motion of Remaining Debtors for Entry of Final Decree on December 18, 2014. Accordingly, the bankruptcy cases for SemCrude, L.P., Eaglwing, L.P., SemCanada II, L.P., SemCanada L.P., SemGas, L.P., SemGroup, L.P., SemMaterials, L.P., and SemStream, L.P. have been closed. As part of its decree, the Court retained jurisdiction over certain on-going adversary proceedings, but the debtors have estimated and paid the claims associated with these remaining adversaries, leaving the non-debtor parties to the adversaries to resolve their remaining claims amongst themselves. On January 2, 2015, Bettina M. Whyte, the duly appointed Trustee of the SemGroup Litigation Trust (the “Litigation Trustee”), filed a notice of appeal of the Bankruptcy Court’s December 18, 2014 order closing the aforementioned bankruptcy cases. However, the Bankruptcy Court’s order of final decree was effective upon entry, and the appeal does not stay the effect of the order. The Litigation Trustee’s appeal to the United States District Court for the District of Delaware is currently pending and will be opposed by SemGroup Corporation and the other remaining reorganized debtors.
Dimmit County, TX claims
An employee of Rose Rock Midstream Field Services, LLC was involved in a tractor trailer accident on January 15, 2015 in Dimmit County, Texas.  A second accident followed resulting in six fatalities and multiple injuries.  Multiple lawsuits involving claims of wrongful death and personal injury were filed in Zavala County and Dimmit County, Texas.  These lawsuits have been consolidated in the District Court, 293rd Judicial District, Zavala County, Texas, as cause number 15-01-13356-ZCV, Maribel Rodriguez and the Estate of David Rodriguez, et al., vs. Rose Rock Midstream Field Services, LLC, SemGroup Corporation, Rose Rock Midstream, L.P. and SemManagement LLC, et al.  Confidential settlement agreements have been entered into with all plaintiffs.  There are pending claims with one defendant/cross-plaintiff for which a Motion for Summary Judgment has been filed, however, the hearing date has not been set.  We believe that any liability that may arise from this action will be within the limits covered by our insurance.  We will continue to defend our position, however we cannot predict the outcome.
Environmental
We may, from time to time, experience leaks of petroleum products from our facilities and, as a result of which, we may incur remediation obligations or property damage claims. In addition, we are subject to numerous environmental regulations. Failure to comply with these regulations could result in the assessment of fines or penalties by regulatory authorities.
The Kansas Department of Health and Environment ("the KDHE") initiated discussions during our bankruptcy proceeding regarding six of our sites in Kansas (five owned by Crude Transportation and one owned by SemGas) that KDHE believed, based on their historical use, may have had soil or groundwater contamination in excess of state standards. KDHE sought our agreement to undertake assessments of these sites to determine whether they are contaminated. We reached an agreement with KDHE on this matter and entered into a Consent Agreement and Final Order with KDHE to conduct environmental assessments on the sites and to pay KDHE’s costs associated with their oversight of this matter. We have conducted Phase II investigations at all sites. Four sites are in various stages of follow up investigation, remediation, monitoring, or closure under KDHE oversight.  The environmental work at these sites is being completed under consent orders between Rose Rock Midstream Crude, LP and the KDHE. Two of the remaining sites have limited impacts to shallow soil and groundwater and the groundwater is currently being monitored on a semi-annual basis until such time that closure can be granted by the KDHE.  No active remediation is anticipated for these two sites.  The final two sites have required additional investigation and soil and groundwater remediation may be necessary to achieve KDHE closure. We do not anticipate any penalties or fines for these historical sites.
We received a Notice of Probable Violation and Civil Penalty dated March 29, 2016 from the U.S. Department of Transportation (the “Notice”) for alleged violations of pipeline operation and maintenance regulations related to a 2014 crude oil release that occurred on our Blackwell to See pipeline segment located in Oklahoma.  This pipeline segment was idled in March 2016 when we initiated service on our new pipeline segment that transports Kansas crude volumes to our Cushing, Oklahoma terminal.  The Notice proposes a penalty of $600,200. We responded to the Notice in April 2016 with information that we believe warrants reduction of the amount of the proposed penalty.
Other matters
We are party to various other claims, legal actions, and complaints arising in the ordinary course of business. In the opinion of our management, the ultimate resolution of these claims, legal actions and complaints, after consideration of amounts accrued, insurance coverage and other arrangements, will not have a material adverse effect on our consolidated financial position, results of operations or cash flows. However, the outcome of such matters is inherently uncertain, and estimates of our consolidated liabilities may change materially as circumstances develop.
Asset retirement obligations
We will be required to incur significant removal and restoration costs when we retire our natural gas gathering and processing facilities in Canada. At June 30, 2016, we have an asset retirement obligation liability of $18.0 million, which is included within other noncurrent liabilities on our condensed consolidated balance sheets. This amount was calculated using the $126.0 million cost we estimate we would incur to retire these facilities, discounted based on our risk-adjusted cost of borrowing and the estimated timing of remediation.
The calculation of the liability for an asset retirement obligation requires the use of significant estimates, including those related to the length of time before the assets will be retired, cost inflation over the assumed life of the assets, actual remediation activities to be required, and the rate at which such obligations should be discounted. Future changes in these estimates could result in material changes in the value of the recorded liability. In addition, future changes in laws or regulations could require us to record additional asset retirement obligations.
Our other segments may also be subject to removal and restoration costs upon retirement of their facilities. However, we are unable to predict when, or if, our pipelines, storage tanks and other facilities would become completely obsolete and require decommissioning. Accordingly, we have not recorded a liability or corresponding asset, as both the amount and timing of such potential future costs are indeterminable.
Purchase and sale commitments
We routinely enter into agreements to purchase and sell petroleum products at specified future dates. We account for derivatives at fair value with the exception of commitments which have been designated as normal purchases and sales for which we do not record assets or liabilities related to these agreements until the product is purchased or sold. At June 30, 2016, such commitments included the following (in thousands):
 
Volume
(Barrels)
 
Value
Fixed price purchases
3,528

 
$
167,030

Fixed price sales
4,563

 
$
218,212

Floating price purchases
12,701

 
$
601,820

Floating price sales
17,773

 
$
786,992


Certain of the commitments shown in the table above relate to agreements to purchase product from a counterparty and to sell a similar amount of product (in a different location) to the same counterparty. Many of the commitments shown in the table above are cancellable by either party, as long as notice is given within the time frame specified in the agreement (generally 30 to 120 days).
Our SemGas segment has a take-or-pay contractual obligation related to the fractionation of natural gas liquids through June 2023. The approximate amount of future obligation is as follows (in thousands):
For year ending:
 
December 31, 2016
$
5,951

December 31, 2017
11,938

December 31, 2018
10,060

December 31, 2019
9,121

December 31, 2020
8,451

Thereafter
15,940

Total expected future payments
$
61,461


SemGas also enters into contracts under which we are responsible for marketing the majority of the gas and natural gas liquids produced by the counterparties to the agreements. The majority of SemGas’ revenues were generated from such contracts.
Rose Rock has a take-or-pay obligation with our equity method investee, White Cliffs, for approximately 5,000 barrels per day of space on White Cliffs' pipeline. The agreement became effective in October 2015 and has a term of 5 years. Annual payments to White Cliffs under the agreement are expected to be $9.4 million.
Equity
EQUITY
EQUITY
Unaudited condensed consolidated statement of changes in owners’ equity
The following table shows the changes in our consolidated owners’ equity accounts from December 31, 2015 to June 30, 2016 (in thousands):
 
Common
Stock
Additional
Paid-in
Capital
Treasury
Stock
Accumulated
Deficit
Accumulated
Other
Comprehensive
Loss
Noncontrolling
Interests
Total
Owners’
Equity
Balance at December 31, 2015
$
439

$
1,217,255

$
(5,593
)
$
(38,012
)
$
(58,562
)
$
80,829

$
1,196,356

Net income (loss)
—

—

—

(7,259
)
—

10,942

3,683

Other comprehensive income, net of income taxes
—

—

—

—

2,482

—

2,482

Issuance of common shares
86

228,460

—

—

—

—

228,546

Distributions to noncontrolling interests
—

—

—

—

—

(21,485
)
(21,485
)
Dividends paid
—

(39,720
)
—

—

—

—

(39,720
)
Unvested dividend equivalent rights
—

206

—

—

—

66

272

Non-cash equity compensation
—

4,592

—

—

—

731

5,323

Issuance of common stock under compensation plans
1

774

—

—

—

—

775

Repurchase of common stock
—

—

(904
)
—

—

—

(904
)
Balance at June 30, 2016
$
526

$
1,411,567

$
(6,497
)
$
(45,271
)
$
(56,080
)
$
71,083

$
1,375,328


Accumulated other comprehensive loss
The following table presents the changes in the components of accumulated other comprehensive loss from December 31, 2015 to June 30, 2016 (in thousands):
 
Currency
Translation
 
Employee
Benefit
Plans
 
Total
Balance at December 31, 2015
$
(57,201
)
 
$
(1,361
)
 
$
(58,562
)
Currency translation adjustment, net of income tax expense of $1,589
2,608

 
—

 
2,608

Changes related to benefit plans, net of income tax benefit of $42
—

 
(126
)
 
(126
)
Balance at June 30, 2016
$
(54,593
)
 
$
(1,487
)
 
$
(56,080
)

There were no significant items reclassified out of accumulated other comprehensive loss to net income for the three months and six months ended June 30, 2016.
Equity issuances
On June 22, 2016, we issued and sold 8,625,000 shares of our Class A common stock, valued at $27.00 per share, to the public for proceeds of $228.5 million, net of underwriting fees and other offering costs of $4.3 million. Proceeds were used to repay borrowings on our revolving credit facility and will be used for future capital expenditures and general corporate purposes.
During the six months ended June 30, 2016, we issued 30,718 shares under the Employee Stock Purchase Plan and 157,077 shares related to our equity based compensation awards.
Equity-based compensation
At June 30, 2016, there were 797,812 unvested shares that have been granted under our director and employee compensation programs. The par value of these shares is not reflected in common stock on the condensed consolidated balance sheet, as these shares have not yet vested. For certain of the awards, the number of shares that will vest is contingent upon our achievement of certain specified targets. If we meet the specified maximum targets, approximately 408,000 additional shares could vest.
The holders of certain restricted stock awards are entitled to equivalent dividends (“UDs”) to be received upon vesting of the related restricted stock awards and will be settled in cash. At June 30, 2016, the value of the UDs to be settled in cash related to unvested restricted stock awards was approximately $390 thousand.
During the six months ended June 30, 2016, we granted 548,143 restricted stock awards with a weighted average grant date fair value of $19.20 per award.
Dividends
The following table sets forth the quarterly dividends per share declared and/or paid to shareholders for the periods indicated:
Quarter Ending
 
Dividend Per Share
 
Date of Record
 
Date Paid
March 31, 2015
 
$
0.34

 
March 9, 2015
 
March 20, 2015
June 30, 2015
 
$
0.38

 
May 18, 2015
 
May 29, 2015
September 30, 2015
 
$
0.42

 
August 17, 2015
 
August 25, 2015
December 31, 2015
 
$
0.45

 
November 16, 2015
 
November 24, 2015
March 31, 2016
 
$
0.45

 
March 7, 2016
 
March 17, 2016
June 30, 2016
 
$
0.45

 
May 16, 2016
 
May 26, 2016
September 30, 2016
 
$
0.45

 
August 15, 2016
 
August 25, 2016
Earnings Per Share
EARNINGS PER SHARE
EARNINGS PER SHARE
Earnings per share is calculated based on income from continuing and discontinued operations less any income attributable to noncontrolling interests. Income attributable to noncontrolling interests represents third-party limited partner unitholders' interests in the earnings of our consolidated subsidiary, Rose Rock.  Rose Rock allocates net income to its limited partners based on the distributions pertaining to the current period's available cash as defined by Rose Rock's partnership agreement. After adjusting for the appropriate period's distributions, the remaining undistributed earnings or excess distributions over earnings, if any, are allocated to Rose Rock's general partner, limited partners and participating securities in accordance with the contractual terms of Rose Rock's partnership agreement and as further prescribed under the two-class method. Incentive distribution rights do not participate in undistributed earnings.
Basic earnings per share is calculated based on the weighted average shares outstanding during the period. Diluted earnings per share includes the dilutive effect of unvested equity compensation awards.
The following summarizes the calculation of basic earnings per share for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per share amounts):
 
Three Months Ended June 30, 2016
 
Three Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
9,933

 
$
(2
)
 
$
9,931

 
$
28,435

 
$
(2
)
 
$
28,433

less: Income attributable to noncontrolling interests
1,922

 
—

 
1,922

 
5,136

 
—

 
5,136

Income (loss) attributable to SemGroup
$
8,011

 
$
(2
)
 
$
8,009

 
$
23,299

 
$
(2
)
 
$
23,297

Weighted average common stock outstanding
45,236

 
45,236

 
45,236

 
43,798

 
43,798

 
43,798

Basic earnings (loss) per share
$
0.18

 
$
—

 
$
0.18

 
$
0.53

 
$
—

 
$
0.53

 
Six Months Ended June 30, 2016
 
Six Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
3,687

 
$
(4
)
 
$
3,683

 
$
34,211

 
$
(2
)
 
$
34,209

less: Income attributable to noncontrolling interests
10,942

 
—

 
10,942

 
9,446

 
—

 
9,446

Income (loss) attributable to SemGroup
$
(7,255
)
 
$
(4
)
 
$
(7,259
)
 
$
24,765

 
$
(2
)
 
$
24,763

Weighted average common stock outstanding
44,553

 
44,553

 
44,553

 
43,758

 
43,758

 
43,758

Basic earnings (loss) per share
$
(0.16
)
 
$
—

 
$
(0.16
)
 
$
0.57

 
$
—

 
$
0.57


The following summarizes the calculation of diluted earnings per share for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per share amounts):

 
Three Months Ended June 30, 2016
 
Three Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
9,933

 
$
(2
)
 
$
9,931

 
$
28,435

 
$
(2
)
 
$
28,433

less: Income attributable to noncontrolling interests
1,922

 
—

 
1,922

 
5,136

 
—

 
5,136

Income (loss) attributable to SemGroup
$
8,011

 
$
(2
)
 
$
8,009

 
$
23,299

 
$
(2
)
 
$
23,297

Weighted average common stock outstanding
45,236

 
45,236

 
45,236

 
43,798

 
43,798

 
43,798

Effect of dilutive securities
411

 
411

 
411

 
215

 
215

 
215

Diluted weighted average common stock outstanding
45,647

 
45,647

 
45,647

 
44,013

 
44,013

 
44,013

Diluted earnings (loss) per share
$
0.18

 
$
—

 
$
0.18

 
$
0.53

 
$
—

 
$
0.53




 
Six Months Ended June 30, 2016
 
Six Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
3,687

 
$
(4
)
 
$
3,683

 
$
34,211

 
$
(2
)
 
$
34,209

less: Income attributable to noncontrolling interests
10,942

 
—

 
10,942

 
9,446

 
—

 
9,446

Income (loss) attributable to SemGroup
$
(7,255
)
 
$
(4
)
 
$
(7,259
)
 
$
24,765

 
$
(2
)
 
$
24,763

Weighted average common stock outstanding
44,553

 
44,553

 
44,553

 
43,758

 
43,758

 
43,758

Effect of dilutive securities
—

 
—

 
—

 
217

 
217

 
217

Diluted weighted average common stock outstanding
44,553

 
44,553

 
44,553

 
43,975

 
43,975

 
43,975

Diluted earnings (loss) per share
$
(0.16
)
 
$
—

 
$
(0.16
)
 
$
0.56

 
$
—

 
$
0.56


For the six months ended June 30, 2016, we experienced a net loss attributable to SemGroup, as such the unvested equity compensation awards would have been antidilutive and, therefore, were not included in the computation of diluted earnings per share.
Supplemental Cash Flow Information
SUPPLEMENTAL CASH FLOW INFORMATION
SUPPLEMENTAL CASH FLOW INFORMATION
The following table summarizes the changes in the components of operating assets and liabilities shown on our condensed consolidated statements of cash flows (in thousands):

 
Six Months Ended June 30,
 
2016
 
2015
Decrease (increase) in restricted cash
$
1

 
$
6,766

Decrease (increase) in accounts receivable
(60,062
)
 
(2,248
)
Decrease (increase) in receivable from affiliates
(4,305
)
 
(1,353
)
Decrease (increase) in inventories
(15,918
)
 
(36,065
)
Decrease (increase) in derivatives and margin deposits
(2,163
)
 
(287
)
Decrease (increase) in other current assets
956

 
(3,134
)
Decrease (increase) in other assets
(1,266
)
 
(2,096
)
Increase (decrease) in accounts payable and accrued liabilities
60,867

 
18,730

Increase (decrease) in payable to affiliates
3,997

 
5,580

Increase (decrease) in payables to pre-petition creditors
—

 
(3,836
)
Increase (decrease) in other noncurrent liabilities
(1,453
)
 
47

 
$
(19,346
)
 
$
(17,896
)
  
Other supplemental disclosures
We paid cash interest of $34.9 million and $28.2 million for the six months ended June 30, 2016 and 2015, respectively.
We paid cash for income taxes (net of refunds received) of $2.3 million and $5.7 million for the six months ended June 30, 2016 and 2015, respectively.
We incurred liabilities for construction work in process that had not been paid of $9.1 million and $16.8 million as of June 30, 2016 and 2015, respectively. Such amounts are not included in capital expenditures on the consolidated statements of cash flows.
We financed prepayments of insurance premiums of $4.0 million and $4.6 million for the six months ended June 30, 2016 and 2015, respectively.
Related Party Transactions
RELATED PARTY TRANSACTIONS
RELATED PARTY TRANSACTIONS
NGL Energy
As described in Note 3, we own a general partner interest in NGL Energy which is accounted for as an equity method investment.
During the three months and six months ended June 30, 2016 and 2015, we generated the following transactions with NGL Energy and its subsidiaries (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenues
$
8,303

 
$
74,447

 
$
16,832

 
$
119,916

Purchases
$
6,366

 
$
75,027

 
$
13,196

 
$
110,261

Reimbursements from NGL Energy for services
$
—

 
$
14

 
$
—

 
$
56


Transactions with NGL Energy and its subsidiaries primarily relate to marketing, leased storage and transportation services of crude oil, including buy/sell transactions. In accordance with ASC 845-10-15, these transactions were reported as revenue on a net basis in our condensed consolidated statements of operations and comprehensive income (loss) because the purchases of inventory and subsequent sales of the inventory were with the same counterparty.
White Cliffs
During the three months ended June 30, 2016 and 2015, we generated storage revenue from White Cliffs of approximately $1.1 million and $1.1 million, respectively. During the six months ended June 30, 2016 and 2015, we generated storage revenue from White Cliffs of approximately $2.2 million and $2.1 million, respectively. We incurred $2.7 million and $1.1 million of cost for the three months ended June 30, 2016 and 2015, respectively, related to transportation fees for shipments on White Cliffs. We incurred $5.2 million and $1.8 million of cost for the six months ended June 30, 2016 and 2015, respectively, related to transportation fees for shipments on White Cliffs. We received $0.1 million and $0.1 million in management fees from White Cliffs for the three months ended June 30, 2016 and 2015, respectively. We received $0.2 million and $0.2 million in management fees from White Cliffs for the six months ended June 30, 2016 and 2015, respectively. During the three and six months ended June 30, 2016, we purchased $3.5 million of crude oil from White Cliffs. There were no product purchases from White Cliffs in the prior year.
Glass Mountain
We incurred $1.4 million and $0.7 million of cost for the three months ended June 30, 2016 and 2015, respectively, related to transportation fees for shipments on the Glass Mountain Pipeline. We incurred $3.3 million and $1.2 million of cost for the six months ended June 30, 2016 and 2015, respectively, related to transportation fees for shipments on the Glass Mountain Pipeline. We received $0.2 million and $0.2 million in fees from Glass Mountain for the three months ended June 30, 2016 and 2015, respectively, related to support and administrative services associated with pipeline operations. We received $0.4 million and $0.4 million in fees from Glass Mountain for the six months ended June 30, 2016 and 2015, respectively, related to support and administrative services associated with pipeline operations. We made purchases of crude oil of $0.4 million and $1.5 million from Glass Mountain during the six months ended June 30, 2016 and 2015, respectively. There were no purchases of crude oil from Glass Mountain during the three months ended June 30, 2016 and 2015.
Legal services
The law firm of Conner & Winters, LLP, of which Mark D. Berman is a partner, performs legal services for us. Mr. Berman is the spouse of Candice L. Cheeseman, Vice President and General Counsel. Mr. Berman does not perform any legal services for us. SemGroup paid $0.3 million and $0.4 million in legal fees and related expenses to this law firm during the three months ended June 30, 2016 and 2015, respectively (of which $0.1 thousand and $0.1 thousand was paid by White Cliffs during the three months ended June 30, 2016 and 2015, respectively). SemGroup paid $0.4 million and $0.7 million in legal fees and related expenses to this law firm during the six months ended June 30, 2016 and 2015, respectively (of which $1.6 thousand and $3.4 thousand was paid by White Cliffs during the six months ended June 30, 2016 and 2015, respectively).
Condensed Consolidating Guarantor Financial Statements (Notes)
Condensed Consolidating Guarantor Financial Statements [Text Block]
CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS

Our SemGroup Notes are guaranteed by certain of our subsidiaries as follows: SemGas, L.P., SemMaterials, L.P., SemGroup Europe Holding, L.L.C., SemOperating G.P., L.L.C., SemMexico, L.L.C., SemDevelopment, L.L.C., Rose Rock Midstream Holdings, LLC and Mid-America Midstream Gas Services, L.L.C. (collectively, the "Guarantors").
Each of the Guarantors is 100% owned by SemGroup Corporation (the "Parent"). Such guarantees of the SemGroup Notes are full and unconditional and constitute the joint and several obligations of the Guarantors. There are no significant restrictions upon the ability of the Parent or any of the Guarantors to obtain funds from its respective subsidiaries by dividend or loan. None of the assets of the Guarantors represent restricted net assets pursuant to Rule 4-08(e)(3) of Regulation S-X under the Securities Act.
In June 2015, SemCanada, L.P. and SemCanada II, L.P. were released as Guarantors and no longer guarantee our SemGroup Notes. Prior period comparative information has been recast to reflect SemCanada, L.P. and SemCanada II, L.P. as non-guarantors.
Unaudited condensed consolidating financial statements for the Parent, the Guarantors and non-guarantors as of June 30, 2016 and December 31, 2015 and for the three months and six months ended June 30, 2016 and 2015 are presented on an equity method basis in the tables below (in thousands).
Intercompany receivable and payable balances, including notes receivable and payable, are capital transactions primarily to facilitate the capital needs of our subsidiaries. As such, subsidiary intercompany balances have been reported as a reduction to equity on the condensed consolidating Guarantor balance sheets. The Parent's net intercompany balance, including note receivable, and investments in subsidiaries have been reported in equity method investments on the condensed consolidating Guarantor balance sheets. Intercompany transactions, such as daily cash management activities, have been reported as financing activities within the condensed consolidating Guarantor statements of cash flows. The Parent's investing activities with subsidiaries, such as the drop down of Wattenberg Holding, LLC and Glass Mountain to Rose Rock in the first quarter of 2015, have been reflected as cash flows from investing activities. Quarterly cash distributions from Rose Rock representing a return on capital have been included in the Parent's cash flows from operations. These balances are eliminated through consolidating adjustments below.

Condensed Consolidating Guarantor Balance Sheets
 
 
June 30, 2016
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
ASSETS
 
 
 
 
 
 
 
 
 
 
Current assets:
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
187,987

 
$
—

 
$
68,614

 
$
(821
)
 
$
255,780

Restricted cash
 
—

 
—

 
31

 
—

 
31

Accounts receivable, net
 
641

 
12,596

 
375,431

 
—

 
388,668

Receivable from affiliates
 
4,897

 
802

 
9,467

 
(4,947
)
 
10,219

Inventories
 
—

 
(120
)
 
85,580

 
—

 
85,460

Other current assets
 
9,228

 
742

 
15,475

 
—

 
25,445

Total current assets
 
202,753

 
14,020


554,598


(5,768
)

765,603

Property, plant and equipment, net
 
4,915

 
532,702

 
1,111,345

 
—

 
1,648,962

Equity method investments
 
1,502,156

 
510,115

 
427,961

 
(1,993,294
)
 
446,938

Goodwill
 
—

 
—

 
34,698

 
—

 
34,698

Other intangible assets, net
 
18

 
140,083

 
16,516

 
—

 
156,617

Other noncurrent assets
 
38,780

 
778

 
4,598

 
—

 
44,156

Total assets
 
$
1,748,622

 
$
1,197,698


$
2,149,716


$
(1,999,062
)

$
3,096,974

LIABILITIES AND OWNERS’ EQUITY
 
 
 
 
 
 
 
 
 
 
Current liabilities:
 
 
 
 
 
 
 
 
 
 
Accounts payable
 
$
533

 
$
11,346

 
$
326,841

 
$
—

 
$
338,720

Payable to affiliates
 
53

 
21

 
13,903

 
(4,947
)
 
9,030

Accrued liabilities
 
9,392

 
11,511

 
63,796

 
4

 
84,703

Other current liabilities
 
364

 
—

 
11,146

 
—

 
11,510

Total current liabilities
 
10,342

 
22,878

 
415,686

 
(4,943
)
 
443,963

Long-term debt, net
 
295,875

 
6,640

 
790,988

 
(23,140
)
 
1,070,363

Deferred income taxes
 
135,985

 
—

 
47,791

 
—

 
183,776

Other noncurrent liabilities
 
2,175

 
—

 
21,369

 
—

 
23,544

Commitments and contingencies
 


 


 


 


 


Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
 
1,304,245

 
1,168,180

 
802,799

 
(1,970,979
)
 
1,304,245

Noncontrolling interests in consolidated subsidiaries
 
—

 
—

 
71,083

 
—

 
71,083

Total owners’ equity
 
1,304,245

 
1,168,180


873,882


(1,970,979
)

1,375,328

Total liabilities and owners’ equity
 
$
1,748,622


$
1,197,698

 
$
2,149,716

 
$
(1,999,062
)
 
$
3,096,974


 
 
December 31, 2015
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
ASSETS
 
 
 
 
 
 
 
 
 
 
Current assets:
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
4,559

 
$
—

 
$
55,101

 
$
(1,564
)
 
$
58,096

Restricted cash
 
—

 
—

 
32

 
—

 
32

Accounts receivable, net
 
640

 
20,015

 
306,058

 
—

 
326,713

Receivable from affiliates
 
1,616

 
1,119

 
6,141

 
(2,962
)
 
5,914

Inventories
 
—

 
(48
)
 
70,287

 
—

 
70,239

Other current assets
 
8,477

 
359

 
10,551

 
—

 
19,387

Total current assets
 
15,292

 
21,445


448,170


(4,526
)

480,381

Property, plant and equipment, net
 
4,335

 
536,628

 
1,025,858

 
—

 
1,566,821

Equity method investments
 
1,546,853

 
426,801

 
438,291

 
(1,860,867
)
 
551,078

Goodwill
 
—

 
13,052

 
34,980

 
—

 
48,032

Other intangible assets, net
 
20

 
144,183

 
18,020

 
—

 
162,223

Other noncurrent assets
 
39,358

 
881

 
5,135

 
—

 
45,374

Total assets
 
$
1,605,858

 
$
1,142,990


$
1,970,454


$
(1,865,393
)

$
2,853,909

LIABILITIES AND OWNERS’ EQUITY
 
 
 
 
 
 
 
 
 
 
Current liabilities:
 
 
 
 
 
 
 
 
 
 
Accounts payable
 
$
734

 
$
11,221

 
$
261,711

 
$
—

 
$
273,666

Payable to affiliates
 
78

 
155

 
7,762

 
(2,962
)
 
5,033

Accrued liabilities
 
5,551

 
10,957

 
68,534

 
5

 
85,047

Other current liabilities
 
569

 
—

 
12,712

 
—

 
13,281

Total current liabilities
 
6,932

 
22,333

 
350,719

 
(2,957
)
 
377,027

Long-term debt, net
 
325,460

 
7,340

 
748,856

 
(23,840
)
 
1,057,816

Deferred income taxes
 
155,411

 
—

 
45,542

 
—

 
200,953

Other noncurrent liabilities
 
2,528

 
—

 
19,229

 
—

 
21,757

Commitments and contingencies
 


 


 


 


 


Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
 
1,115,527

 
1,113,317

 
725,279

 
(1,838,596
)
 
1,115,527

Noncontrolling interests in consolidated subsidiaries
 
—

 
—

 
80,829

 
—

 
80,829

Total owners’ equity
 
1,115,527

 
1,113,317


806,108


(1,838,596
)

1,196,356

Total liabilities and owners’ equity
 
$
1,605,858

 
$
1,142,990


$
1,970,454


$
(1,865,393
)

$
2,853,909








Condensed Consolidating Guarantor Statements of Operations
 
Three Months Ended June 30, 2016
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
39,849

 
$
172,798

 
$
(2,521
)
 
$
210,126

Service
—

 
10,872

 
51,328

 
—

 
62,200

Other
—

 
—

 
15,051

 
—

 
15,051

Total revenues
—


50,721


239,177


(2,521
)

287,377

Expenses:
 
 
 
 
 
 
 
 

Costs of products sold, exclusive of depreciation and amortization shown below
—

 
27,171

 
152,192

 
(2,521
)
 
176,842

Operating
—

 
9,192

 
45,515

 
—

 
54,707

General and administrative
4,782

 
2,379

 
13,614

 
—

 
20,775

Depreciation and amortization
393

 
9,146

 
15,509

 
—

 
25,048

Loss (gain) on disposal or impairment of long-lived assets, net
—

 
(1
)
 
1,686

 
—

 
1,685

Total expenses
5,175


47,887


228,516


(2,521
)

279,057

Earnings from equity method investments
6,557

 
9,034

 
17,077

 
(15,590
)
 
17,078

Operating income
1,382


11,868


27,738


(15,590
)

25,398

Other expenses (income), net:
 
 
 
 
 
 
 
 

Interest expense (income)
(936
)
 
8,333

 
11,714

 
(236
)
 
18,875

Foreign currency transaction loss
—

 
—

 
1,543

 
—

 
1,543

Gain on sale of equity method investment
(9,120
)
 
—

 
—

 
—

 
(9,120
)
Other income, net
(249
)
 
—

 
(478
)
 
236

 
(491
)
Total other expense (income), net
(10,305
)

8,333


12,779


—


10,807

Income from continuing operations before income taxes
11,687


3,535


14,959


(15,590
)

14,591

Income tax expense
3,679

 
—

 
979

 
—

 
4,658

Income from continuing operations
8,008


3,535


13,980


(15,590
)

9,933

Loss from discontinued operations, net of income taxes
—

 
(1
)
 
(1
)
 
—

 
(2
)
Net income
8,008


3,534


13,979


(15,590
)

9,931

Less: net income attributable to noncontrolling interests
—

 
—

 
1,922

 
—

 
1,922

Net income attributable to SemGroup
$
8,008


$
3,534


$
12,057


$
(15,590
)

$
8,009

Net income
$
8,008

 
$
3,534


$
13,979


$
(15,590
)

$
9,931

Other comprehensive income (loss), net of income taxes
18,480

 
485

 
(12,374
)
 
—

 
6,591

Comprehensive income
26,488

 
4,019


1,605


(15,590
)

16,522

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
1,922

 
—

 
1,922

Comprehensive income (loss) attributable to SemGroup
$
26,488

 
$
4,019


$
(317
)

$
(15,590
)

$
14,600

 
Three Months Ended June 30, 2015
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
50,293

 
$
244,886

 
$
(6,443
)
 
$
288,736

Service
—

 
15,743

 
50,861

 
—

 
66,604

Other
—

 
—

 
21,886

 
—

 
21,886

Total revenues
—

 
66,036


317,633


(6,443
)

377,226

Expenses:
 
 
 
 
 
 
 
 
 
Costs of products sold, exclusive of depreciation and amortization shown below
—

 
35,632

 
214,969

 
(6,443
)
 
244,158

Operating
—

 
8,822

 
51,978

 
—

 
60,800

General and administrative
4,626

 
2,642

 
15,649

 
—

 
22,917

Depreciation and amortization
329

 
7,255

 
17,090

 
—

 
24,674

Loss on disposal or impairment of long-lived assets, net
—

 
108

 
1,264

 
—

 
1,372

Total expenses
4,955

 
54,459


300,950


(6,443
)

353,921

Earnings from equity method investments
28,583

 
15,048

 
17,683

 
(37,411
)
 
23,903

Gain on issuance of common units by equity method investee
5,897

 
—

 
—

 
—

 
5,897

Operating income
29,525

 
26,625


34,366


(37,411
)

53,105

Other expenses (income), net:
 
 
 
 
 
 
 
 
 
Interest expense
781

 
6,160

 
10,614

 
(733
)
 
16,822

Foreign currency transaction gain
(5
)
 
—

 
(290
)
 
—

 
(295
)
Gain on sale of equity method investment
(6,623
)
 
—

 
—

 
—

 
(6,623
)
Other income, net
(778
)
 
—

 
(50
)
 
733

 
(95
)
Total other expense (income), net
(6,625
)
 
6,160


10,274


—


9,809

Income from continuing operations before income taxes
36,150

 
20,465


24,092


(37,411
)

43,296

Income tax expense
12,853

 
—

 
2,008

 
—

 
14,861

Income from continuing operations
23,297

 
20,465


22,084


(37,411
)

28,435

Loss from discontinued operations, net of income taxes
—

 
(1
)
 
(1
)
 
—

 
(2
)
Net income
23,297

 
20,464


22,083


(37,411
)

28,433

Less: net income attributable to noncontrolling interests
—

 
—

 
5,136

 
—

 
5,136

Net income attributable to SemGroup
$
23,297

 
$
20,464


$
16,947


$
(37,411
)

$
23,297

Net income
$
23,297

 
$
20,464


$
22,083


$
(37,411
)

$
28,433

Other comprehensive income (loss), net of income taxes
(2,346
)
 
—

 
7,866

 
—

 
5,520

Comprehensive income
20,951

 
20,464


29,949


(37,411
)

33,953

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
5,136

 
—

 
5,136

Comprehensive income attributable to SemGroup
$
20,951

 
$
20,464


$
24,813


$
(37,411
)

$
28,817

 
Six Months Ended June 30, 2016
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
73,247

 
$
379,042

 
$
(5,267
)
 
$
447,022

Service
—

 
23,740

 
102,533

 
—

 
126,273

Other
—

 
—

 
28,933

 
—

 
28,933

Total revenues
—

 
96,987


510,508


(5,267
)

602,228

Expenses:
 
 
 
 
 
 
 
 

Costs of products sold, exclusive of depreciation and amortization shown below
—

 
51,780

 
327,276

 
(5,267
)
 
373,789

Operating
—

 
16,885

 
88,014

 
—

 
104,899

General and administrative
10,654

 
4,625

 
26,556

 
—

 
41,835

Depreciation and amortization
773

 
18,020

 
30,302

 
—

 
49,095

Loss on disposal of long-lived assets, net
—

 
13,051

 
1,941

 
—

 
14,992

Total expenses
11,427

 
104,361


474,089


(5,267
)

584,610

Earnings from equity method investments
13,147

 
28,214

 
37,917

 
(39,129
)
 
40,149

Loss on issuance of common units by equity method investee
(41
)
 
—

 
—

 
—

 
(41
)
Operating income
1,679

 
20,840


74,336


(39,129
)

57,726

Other expenses (income), net:
 
 
 
 
 
 
 
 

Interest expense (income)
(1,513
)
 
16,336

 
23,460

 
(473
)
 
37,810

Foreign currency transaction loss
—

 
—

 
3,012

 
—

 
3,012

Loss on sale or impairment of equity method investment
30,644

 
—

 
—

 
—

 
30,644

Other income, net
(487
)
 
—

 
(664
)
 
473

 
(678
)
Total other expenses, net
28,644

 
16,336


25,808


—


70,788

Income (loss) from continuing operations before income taxes
(26,965
)
 
4,504


48,528


(39,129
)

(13,062
)
Income tax expense (benefit)
(19,706
)
 
—

 
2,957

 
—

 
(16,749
)
Income (loss) from continuing operations
(7,259
)
 
4,504


45,571


(39,129
)

3,687

Loss from discontinued operations, net of income taxes
—

 
(3
)
 
(1
)
 
—

 
(4
)
Net income (loss)
(7,259
)
 
4,501


45,570


(39,129
)

3,683

Less: net income attributable to noncontrolling interests
—

 
—

 
10,942

 
—

 
10,942

Net income (loss) attributable to SemGroup
$
(7,259
)
 
$
4,501


$
34,628


$
(39,129
)

$
(7,259
)
Net income (loss)
$
(7,259
)
 
$
4,501


$
45,570


$
(39,129
)

$
3,683

Other comprehensive income (loss), net of income taxes
(1,986
)
 
701

 
3,767

 
—

 
2,482

Comprehensive income (loss)
(9,245
)
 
5,202


49,337


(39,129
)

6,165

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
10,942

 
—

 
10,942

Comprehensive income (loss) attributable to SemGroup
$
(9,245
)
 
$
5,202


$
38,395


$
(39,129
)

$
(4,777
)
 
Six Months Ended June 30, 2015
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
101,346

 
$
419,938

 
$
(12,417
)
 
$
508,867

Service
—

 
30,202

 
98,279

 
—

 
128,481

Other
—

 
—

 
38,188

 
—

 
38,188

Total revenues
—

 
131,548

 
556,405

 
(12,417
)
 
675,536

Expenses:
 
 
 
 
 
 
 
 
 
Costs of products sold, exclusive of depreciation and amortization shown below
—

 
76,300

 
372,347

 
(12,417
)
 
436,230

Operating
—

 
16,936

 
96,954

 
—

 
113,890

General and administrative
22,228

 
4,706

 
28,293

 
—

 
55,227

Depreciation and amortization
623

 
14,288

 
33,497

 
—

 
48,408

Loss on disposal of long-lived assets, net
—

 
107

 
2,323

 
—

 
2,430

Total expenses
22,851

 
112,337

 
533,414

 
(12,417
)
 
656,185

Earnings from equity method investments
43,388

 
27,576

 
38,547

 
(65,049
)
 
44,462

Gain on issuance of common units by equity method investee
5,897

 
—

 
—

 
—

 
5,897

Operating income
26,434

 
46,787

 
61,538

 
(65,049
)
 
69,710

Other expenses (income), net:
 
 
 
 
 
 
 
 
 
Interest expense
2,203

 
11,651

 
19,058

 
(1,499
)
 
31,413

Foreign currency transaction gain
(5
)
 
—

 
(809
)
 
—

 
(814
)
Gain on sale of equity method investment
(14,517
)
 
—

 
—

 
—

 
(14,517
)
Other income, net
(1,570
)
 
—

 
(115
)
 
1,499

 
(186
)
Total other expenses (income), net
(13,889
)
 
11,651

 
18,134

 
—

 
15,896

Income from continuing operations before income taxes
40,323

 
35,136

 
43,404

 
(65,049
)
 
53,814

Income tax expense
15,560

 
—

 
4,043

 
—

 
19,603

Income from continuing operations
24,763

 
35,136

 
39,361

 
(65,049
)
 
34,211

Loss from discontinued operations, net of income taxes
—

 
(1
)
 
(1
)
 
—

 
(2
)
Net income
24,763

 
35,135

 
39,360

 
(65,049
)
 
34,209

Less: net income attributable to noncontrolling interests
—

 
—

 
9,446

 
—

 
9,446

Net income attributable to SemGroup
$
24,763

 
$
35,135

 
$
29,914

 
$
(65,049
)
 
$
24,763

Net income
24,763

 
35,135

 
39,360

 
(65,049
)
 
34,209

Other comprehensive income (loss), net of income taxes
6,300

 
—

 
(9,840
)
 
—

 
(3,540
)
Comprehensive income
31,063

 
35,135

 
29,520

 
(65,049
)
 
30,669

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
9,446

 
—

 
9,446

Comprehensive income attributable to SemGroup
$
31,063

 
$
35,135

 
$
20,074

 
$
(65,049
)
 
$
21,223


Condensed Consolidating Guarantor Statements of Cash Flows
 
 
Six Months Ended June 30, 2016
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Net cash provided by operating activities
 
$
25,427

 
$
17,351

 
$
56,585

 
$
(25,448
)
 
$
73,915

Cash flows from investing activities:
 
 
 
 
 
 
 
 
 

Capital expenditures
 
(1,350
)
 
(11,211
)
 
(114,151
)
 
—

 
(126,712
)
Proceeds from sale of long-lived assets
 
—

 
—

 
114

 
—

 
114

Contributions to equity method investments
 
—

 
—

 
(3,448
)
 
—

 
(3,448
)
Proceeds from sale of common units of equity method investee
 
60,483

 
—

 
—

 
—

 
60,483

Distributions in excess of equity in earnings of affiliates
 
13,767

 
—

 
13,778

 
(13,767
)
 
13,778

Net cash provided by (used in) investing activities
 
72,900


(11,211
)

(103,707
)

(13,767
)
 
(55,785
)
Cash flows from financing activities:
 
 
 
 
 
 
 
 
 

Borrowings on credit facilities
 
118,000

 
—

 
165,500

 
—

 
283,500

Principal payments on credit facilities and other obligations
 
(148,367
)
 
—

 
(124,514
)
 
—

 
(272,881
)
Proceeds from issuance of common units, net of offering costs
 
228,546

 
—

 
—

 
—

 
228,546

Distributions to noncontrolling interests
 
—

 
—

 
(21,485
)
 
—

 
(21,485
)
Repurchase of common stock for payment of statutory taxes due on equity-based compensation
 
(904
)
 
—

 
—

 
—

 
(904
)
Dividends paid
 
(39,720
)
 
—

 
—

 
—

 
(39,720
)
Proceeds from issuance of common stock under employee stock purchase plan
 
555

 
—

 
—

 
—

 
555

Intercompany borrowings (advances), net
 
(73,009
)
 
(6,140
)
 
39,191

 
39,958

 
—

Net cash provided by (used in) financing activities
 
85,101

 
(6,140
)

58,692


39,958

 
177,611

Effect of exchange rate changes on cash and cash equivalents
 
—

 
—

 
1,943

 
—

 
1,943

Change in cash and cash equivalents
 
183,428

 
—


13,513


743

 
197,684

Cash and cash equivalents at beginning of period
 
4,559

 
—

 
55,101

 
(1,564
)
 
58,096

Cash and cash equivalents at end of period
 
$
187,987

 
$
—


$
68,614


$
(821
)
 
$
255,780


 
 
Six Months Ended June 30, 2015
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Net cash provided by operating activities
 
$
19,092

 
$
18,222

 
$
55,462

 
$
(19,819
)
 
$
72,957

Cash flows from investing activities:
 
 
 
 
 
 
 
 
 
 
Capital expenditures
 
(1,105
)
 
(73,195
)
 
(162,656
)
 
—

 
(236,956
)
Proceeds from sale of long-lived assets
 
—

 
20

 
210

 
—

 
230

Proceeds from the sale of Wattenberg Holding, LLC and Glass Mountain Holding, LLC to Rose Rock Midstream L.P.
 
251,181

 
—

 
—

 
(251,181
)
 
—

Contributions to equity method investments
 
—

 
—

 
(23,461
)
 
—

 
(23,461
)
Proceeds from sale of common units of equity method investee
 
56,318

 
—

 
—

 
—

 
56,318

Distributions in excess of equity in earnings of affiliates
 
11,676

 
—

 
13,077

 
(11,676
)
 
13,077

Net cash provided by (used in) investing activities
 
318,070

 
(73,175
)

(172,830
)

(262,857
)
 
(190,792
)
Cash flows from financing activities:
 
 
 
 
 
 
 
 
 

Debt issuance costs
 
(601
)
 
—

 
(5,688
)
 
—

 
(6,289
)
Borrowings on credit facilities and issuance of senior secured notes, net of discount
 
126,000

 
—

 
676,208

 
—

 
802,208

Principal payments on credit facilities and other obligations
 
(161,000
)
 
—

 
(364,024
)
 
—

 
(525,024
)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs
 
—

 
—

 
89,119

 
—

 
89,119

Distributions to noncontrolling interests
 
—

 
—

 
(19,261
)
 
—

 
(19,261
)
Repurchase of common stock for payment of statutory taxes due on equity-based compensation
 
(4,254
)
 
—

 
—

 
—

 
(4,254
)
Dividends paid
 
(31,478
)
 
—

 
—

 
—

 
(31,478
)
Proceeds from issuance of common stock under employee stock purchase plan
 
609

 
—

 
—

 
—

 
609

Intercompany borrowing (advances), net
 
(157,632
)
 
54,953

 
(181,841
)
 
284,520

 
—

Net cash provided by (used in) financing activities
 
(228,356
)
 
54,953


194,513


284,520

 
305,630

Effect of exchange rate changes on cash and cash equivalents
 
—

 
—

 
390

 
—

 
390

Change in cash and cash equivalents
 
108,806

 
—


77,535


1,844

 
188,185

Cash and cash equivalents at beginning of period
 
9,254

 
—

 
35,445

 
(4,101
)
 
40,598

Cash and cash equivalents at end of period
 
$
118,060

 
$
—


$
112,980


$
(2,257
)
 
$
228,783

Overview (Policies)
Basis of presentation 
Basis of presentation
The accompanying condensed consolidated balance sheet at December 31, 2015, which is derived from audited financial statements, and the unaudited condensed consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States and the rules and regulations of the Securities and Exchange Commission ("SEC"). These financial statements include all normal and recurring adjustments that, in the opinion of management, are necessary to present fairly the financial position of the Company and the results of its operations and its cash flows.
Our condensed consolidated financial statements include the accounts of our controlled subsidiaries. All significant transactions between our consolidated subsidiaries have been eliminated.
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts and disclosures in the financial statements. Although management believes these estimates are reasonable, actual results could differ materially from these estimates. The results of operations for the three months and six months ended June 30, 2016, are not necessarily indicative of the results to be expected for the full year ending December 31, 2016.
Pursuant to the rules and regulations of the SEC, the accompanying condensed consolidated financial statements do not include all of the information and notes normally included with financial statements prepared in accordance with accounting principles generally accepted in the United States. Certain reclassifications have been made to conform previously reported balances to the current presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2015, which are included in our Annual Report on Form 10-K for the year ended December 31, 2015, filed with the SEC.
Our significant accounting policies are consistent with those described in our Annual Report on Form 10-K for the year ended December 31, 2015.
Recent accounting pronouncements 
Recent accounting pronouncements
In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduces new guidance for estimating credit losses on certain types of financial instruments based on expected losses and the timing of the recognition of such losses. For public entities, this ASU is effective for annual periods beginning after December 15, 2019, and interim periods within those years and early adoption is permitted in the year prior to the effective date. We will adopt this guidance in the first quarter of 2020. The impact is not expected to be material.
In March 2016, the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting'', which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material.
In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which amends the existing lease guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by operating and finance leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the income statement and statement of cash flows. For public entities, this ASU will be effective for annual periods beginning after December 15, 2018, and interim periods within those years. The new guidance shall be applied using a modified retrospective approach and early adoption is permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements. We will adopt this guidance in the first quarter of 2019.
In November 2015, the FASB issued ASU 2015-17, "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes", which requires all deferred tax assets and liabilities to be classified as noncurrent in the statement of financial position. For public entities, this ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those years. The new guidance may be applied prospectively or retrospectively and early adoption is permitted. We have not determined which method we will apply when we adopt the standard. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material.
In July 2015, the FASB issued ASU 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory", which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value rather than the lower of cost or market. The standard will be effective for public business entities for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The new guidance shall be applied prospectively and early adoption is permitted. We will adopt this guidance in the first quarter of 2017. The impact is not expected to be material.
In April 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs”, which is designed to simplify presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. In August 2015, the FASB issued ASU 2015-15, “Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements - Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting,” which amended the SEC paragraphs of ASC Subtopic 835-30 to include the language from the SEC Staff Announcement indicating that the SEC would not object to presenting deferred debt issuance costs related to line-of-credit agreements as assets and subsequently amortizing the deferred debt issuance costs ratably over the term of the agreement. The standards are effective for U.S. public companies for annual reporting periods beginning after December 15, 2015. The new guidance has been applied on a retrospective basis for all periods presented. We adopted this guidance in the first quarter of 2016. The impact was not material. For presentation purposes, $16.8 million of debt issuance costs which had previously been reported as other noncurrent assets were reclassified as a reduction of long-term debt on the December 31, 2015 balance sheet. Capitalized loan fees related to our revolving credit facilities continue to be presented as other noncurrent assets.
In February 2015, the FASB issued ASU 2015-02, “Consolidation (Topic 810): Amendments to the Consolidation Analysis,” which adds requirements that limited partnerships must meet to qualify as voting interest entities and modifies the evaluation of whether limited partnerships are variable interest entities or voting interest entities. It also eliminates the presumption that a general partner should consolidate a limited partnership. This guidance is effective for public companies for fiscal years beginning after December 15, 2015. We adopted this guidance in the first quarter of 2016. The impact was not material.
In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers," which supersedes nearly all existing revenue recognition guidance under accounting principles generally accepted in the United States ("U.S. GAAP"). The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP. The standard permits using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08 which amended the principal-versus-agent implementation guidance set forth in ASU 2014-09. Among other things, ASU 2016-08 clarifies that an entity should evaluate whether it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU 2016-10 which amended certain aspects of the guidance related to identifying performance obligations and licensing implementation within ASU 2014-09. In June 2016, the FASB issued ASU 2016-12 which narrows the scope around certain aspects of the criterion used in determining when to recognize revenue. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements and have not yet determined the method by which we will adopt the standard. We will adopt this guidance in the first quarter of 2018.
Financial Instruments (Policies)
Fair Value of Financial Instruments, Policy [Policy Text Block]
"Level 1" measurements are based on inputs consisting of unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. These include commodity futures contracts that are traded on an exchange.
"Level 2" measurements are based on inputs consisting of market observable and corroborated prices for similar derivative contracts. Assets and liabilities classified as Level 2 include over the counter ("OTC") traded physical fixed priced purchases and sales forward contracts.
"Level 3" measurements are based on inputs from a pricing service and/or internal valuation models incorporating observable and unobservable market data. These include commodity derivatives, such as forwards and swaps for which there is not a highly liquid market and therefore are not included in Level 2 above.
Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the measurement requires judgment and may affect the valuation of assets and liabilities and their placement within the fair value levels. At June 30, 2016, all of our physical fixed price forward purchases and sales contracts were being accounted for as normal purchases and normal sales.
Rose Rock Midstream, L.P. (Tables)
Distributions Paid and Declared 
The following table shows the cash distributions paid or declared during 2016 and 2015 (in thousands, except for per unit amounts):
 
Distribution
Per Unit
 
Distributions Paid/To Be Paid
Quarter Ended
SemGroup
Noncontrolling
Interest
Common Units
Total
Distributions
General
Partner
Incentive
Distributions
Common
Units
Subordinated
Units
December 31, 2014
$
0.6200

 
$
485

$
3,487

$
6,551

$
5,202

$
8,544

$
24,269

March 31, 2015
$
0.6350

 
$
568

$
4,450

$
13,148

$
—

$
10,213

$
28,379

June 30, 2015
$
0.6500

 
$
590

$
4,979

$
13,458

$
—

$
10,456

$
29,483

September 30, 2015
$
0.6600

 
$
604

$
5,333

$
13,665

$
—

$
10,619

$
30,221

December 31, 2015
$
0.6600

 
$
604

$
5,333

$
13,665

$
—

$
10,622

$
30,224

March 31, 2016
$
0.6600

 
$
605

$
5,338

$
13,665

$
—

$
10,643

$
30,251

June 30, 2016
$
0.6600

*
$
605

$
5,339

$
13,665

$
—

$
10,648

$
30,257


*Expected distributions related to the quarter ended June 30, 2016, which will be paid on August 12, 2016 to unitholders of record as of August 2, 2016.
Summarized Balance Sheet Information 
Certain summarized balance sheet information of Rose Rock is shown below (in thousands):
 
(Unaudited)
 
 
 
June 30,
2016
 
December 31,
2015
Cash
$
7,909

 
$
9,059

Other current assets
413,625

 
310,555

Property, plant and equipment, net
443,327

 
441,596

Equity method investments
427,961

 
438,291

Goodwill
26,628

 
26,628

Other noncurrent assets, net
17,978

 
19,461

Total assets
$
1,337,428

 
$
1,245,590

 
 
 
 
Current liabilities
$
356,248

 
$
283,029

Long-term debt
774,488

 
732,356

Partners’ capital attributable to SemGroup
135,609

 
149,376

Partners’ capital attributable to noncontrolling interests
71,083

 
80,829

Total liabilities and partners' capital
$
1,337,428

 
$
1,245,590

Summarized Income Statement Information 
Certain summarized income statement information of Rose Rock for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenue
$
169,144

 
$
223,303

 
$
373,095

 
$
357,996

Cost of products sold
$
128,763

 
$
173,133

 
$
280,154

 
$
269,370

Operating, general and administrative expenses
$
26,868

 
$
29,985

 
$
53,469

 
$
56,556

Depreciation and amortization expense
$
8,235

 
$
10,608

 
$
16,128

 
$
20,751

Earnings from equity method investments
$
17,078

 
$
17,683

 
$
37,917

 
$
38,547

Net income
$
9,922

 
$
17,068

 
$
36,390

 
$
31,668

Equity Method Investments (Tables)
Schedule of equity method investments [Table Text Block] 
Our equity method investments consisted of the following (in thousands):
 
June 30, 2016
 
December 31, 2015
White Cliffs Pipeline, L.L.C.
$
290,668

 
$
297,109

NGL Energy Partners LP
18,977

 
112,787

Glass Mountain Pipeline, LLC
137,293

 
141,182

Total equity method investments
$
446,938

 
$
551,078

Earnings from equity method investments [Table Text Block] 
Our earnings from equity method investments consisted of the following (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
White Cliffs Pipeline, L.L.C.
$
16,428

 
$
15,545

 
$
36,208

 
$
34,635

NGL Energy Partners LP(1)
—

 
6,220

 
2,232

 
5,915

Glass Mountain Pipeline, LLC
650

 
2,138

 
1,709

 
3,912

Total earnings from equity method investments
$
17,078

 
$
23,903

 
$
40,149

 
$
44,462


(1) Excluding loss on issuance of common units of $41.0 thousand for the six months ended June 30, 2016 and a gain on the issuance of common units of $5.9 million for the three and six months ended June 30, 2015. Additionally, gains and losses on the disposal or impairment of equity investments are not reported within "earnings from equity method investments" in the condensed consolidated statements of operations and comprehensive income (loss).
Cash distributions received from equity method investments [Table Text Block] 
Cash distributions received from equity method investments consisted of the following (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
White Cliffs Pipeline, L.L.C.
$
21,664

 
$
20,551

 
$
45,762

 
$
44,705

NGL Energy Partners LP
—

 
4,468

 
4,873

 
9,483

Glass Mountain Pipeline, LLC
3,118

 
5,009

 
5,933

 
6,920

Total cash distributions received from equity method investments
$
24,782

 
$
30,028

 
$
56,568

 
$
61,108

Schedule of equity method investments [Table Text Block] 
Certain unaudited summarized income statement information of White Cliffs Pipeline, L.L.C. ("White Cliffs") for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenue
$
55,586

 
$
48,509

 
$
113,642

 
$
103,123

Cost of products sold
$
2,803

 
$
169

 
$
3,053

 
$
1,102

Operating, general and administrative expenses
$
10,125

 
$
8,876

 
$
19,727

 
$
16,296

Depreciation and amortization expense
$
10,084

 
$
8,587

 
$
19,047

 
$
17,125

Net income
$
32,575

 
$
30,870

 
$
71,822

 
$
68,593

Schedule of equity method investments [Table Text Block] 
Certain unaudited summarized income statement information of NGL Energy for the three months and six months ended March 31, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended March 31,
 
Six Months Ended March 31,
 
2016
 
2015
 
2016
 
2015
Revenue
$
2,325,440

 
$
3,220,771

 
$
5,010,446

 
$
7,772,917

Cost of sales
$
2,077,160

 
$
2,933,021

 
$
4,510,660

 
$
7,244,689

Operating, general and administrative expenses
$
399,373

 
$
151,793

 
$
509,145

 
$
323,857

Depreciation and amortization expense
$
53,152

 
$
54,140

 
$
112,332

 
$
104,475

Net income (loss)
$
(206,985
)
 
$
90,942

 
$
(155,990
)
 
$
85,673

 
Schedule of equity method investments [Table Text Block] 
Certain unaudited summarized income statement information of Glass Mountain for the three months and six months ended June 30, 2016 and 2015 is shown below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenue
$
6,898

 
$
9,788

 
$
15,470

 
$
20,909

Cost of sales
$
(120
)
 
$
(40
)
 
$
445

 
$
1,974

Operating, general and administrative expenses
$
1,618

 
$
1,513

 
$
3,463

 
$
2,920

Depreciation and amortization expense
$
3,989

 
$
3,932

 
$
7,925

 
$
7,976

Net income
$
1,407

 
$
4,381

 
$
3,632

 
$
8,036

Segments (Tables)
Schedule of Segment Reporting Information
Our results by segment are presented in the tables below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenues:
 
 
 
 
 
 
 
   Crude Transportation
 
 
 
 
 
 
 
External
$
15,643

 
$
22,425

 
$
32,839

 
$
42,752

Intersegment
5,128

 
3,562

 
12,341

 
7,283

   Crude Facilities
 
 
 
 
 
 
 
External
10,300

 
11,402

 
20,433

 
22,807

Intersegment
2,526

 
—

 
5,272

 
—

   Crude Supply and Logistics
 
 
 
 
 
 
 
External
143,201

 
189,476

 
319,823

 
292,437

   SemGas
 
 
 
 
 
 
 
External
48,200

 
60,270

 
91,720

 
120,546

Intersegment
2,521

 
6,451

 
5,267

 
12,432

   SemCAMS
 
 
 
 
 
 
 
External
33,815

 
35,915

 
64,681

 
65,639

   SemLogistics
 
 
 
 
 
 
 
External
5,932

 
6,279

 
12,312

 
11,431

   SemMexico
 
 
 
 
 
 
 
External
30,286

 
51,459

 
60,420

 
112,949

   Corporate and Other
 
 
 
 
 
 
 
External
—

 
—

 
—

 
6,975

Intersegment
(10,175
)
 
(10,013
)

(22,880
)

(19,715
)
Total Revenues
$
287,377


$
377,226


$
602,228


$
675,536

 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Earnings from equity method investments:
 
 
 
 
 
 
 
   Crude Transportation
$
17,078

 
$
17,683

 
$
37,917

 
$
38,547

   Corporate and Other(1)
—

 
12,117

 
2,191

 
11,812

Total earnings from equity method investments
$
17,078

 
$
29,800


$
40,108


$
50,359

(1) Includes historical earnings from equity method investments including gain (loss) on issuance of common units by equity method investee related to our investment in NGL Energy. Gains and losses on the disposal or impairment of equity investments are not reported within "earnings from equity method investments" in the condensed consolidated statements of operations and comprehensive income (loss). See Note 3 for additional information.
 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Depreciation and amortization:
 
 
 
 
 
 
 
   Crude Transportation
$
6,171

 
$
9,038

 
$
12,030

 
$
17,656

   Crude Facilities
1,921

 
1,406

 
3,805

 
2,775

   Crude Supply and Logistics
40

 
40

 
80

 
79

   SemGas
9,194

 
7,359

 
18,116

 
14,497

   SemCAMS
4,294

 
3,187

 
8,245

 
6,253

   SemLogistics
1,983

 
2,154

 
3,943

 
4,194

   SemMexico
949

 
1,037

 
1,890

 
2,090

   Corporate and Other
496

 
453

 
986

 
864

Total depreciation and amortization
$
25,048


$
24,674


$
49,095


$
48,408

 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Income tax expense (benefit):
 
 
 
 
 
 
 
SemCAMS
$
451

 
$
616

 
$
1,416

 
$
1,167

SemLogistics
(273
)
 
167

 
(214
)
 
(202
)
SemMexico
194

 
764

 
801

 
1,754

Corporate and Other
4,286

 
13,314

 
(18,752
)
 
16,884

Total income tax expense (benefit)
$
4,658


$
14,861


$
(16,749
)

$
19,603

 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Segment profit (1):
 
 
 
 
 
 
 
   Crude Transportation
$
18,161

 
$
19,983

 
$
43,579

 
$
44,507

   Crude Facilities
9,371

 
7,963

 
18,958

 
16,365

   Crude Supply and Logistics
10,069

 
10,978

 
19,162

 
16,159

   SemGas
12,304

 
17,671

 
11,312

 
32,551

   SemCAMS
9,000

 
7,981

 
18,904

 
15,866

   SemLogistics
2,002

 
1,992

 
4,661

 
2,853

   SemMexico
2,024

 
5,056

 
4,342

 
10,179

   Corporate and Other(2)
(8,008
)
 
4,740

 
(14,168
)
 
(19,132
)
Total segment profit
$
54,923


$
76,364


$
106,750


$
119,348

(1) Segment profit represents revenues excluding unrealized gains (losses) related to derivative instruments plus earnings from equity method investments less cost of sales excluding depreciation and amortization and less operating and general and administrative expenses.
(2) Corporate and Other includes amounts previously included in the SemStream segment which ceased to be a reportable segment in the second quarter of 2016. See Note 3 for additional information.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Reconciliation of segment profit to net income:
 
 
 
 
 
 
 
   Total segment profit
$
54,923


$
76,364


$
106,750


$
119,348

     Less:
 
 
 
 
 
 
 
Net unrealized loss (gain) related to derivative instruments
4,477

 
(1,415
)
 
(71
)
 
1,230

Depreciation and amortization
25,048


24,674


49,095


48,408

Interest expense
18,875

 
16,822

 
37,810

 
31,413

Foreign currency transaction loss (gain)
1,543

 
(295
)
 
3,012

 
(814
)
Loss (gain) on sale or impairment of equity method investment
(9,120
)
 
(6,623
)
 
30,644

 
(14,517
)
Other income, net
(491
)
 
(95
)
 
(678
)
 
(186
)
Income tax expense
4,658

 
14,861

 
(16,749
)
 
19,603

Loss from discontinued operations, net of taxes
2

 
2

 
4

 
2

   Net income
$
9,931


$
28,433


$
3,683


$
34,209

 
 
 
 
 
 
 
 
 
 
 
 
 
June 30,
2016
 
December 31,
2015
Total assets (excluding intersegment receivables):
 
 
 
 
 
 
 
   Crude Transportation
 
 
 
 
$
931,362

 
$
877,017

   Crude Facilities
 
 
 
 
154,359

 
155,186

   Crude Supply and Logistics
 
 
 
 
430,297

 
328,419

   SemGas
 
 
 
 
691,823

 
719,789

   SemCAMS
 
 
 
 
376,586

 
331,749

   SemLogistics
 
 
 
 
143,648

 
155,794

   SemMexico
 
 
 
 
86,073

 
89,608

   Corporate and Other(1)
 
 
 
 
282,826

 
196,347

Total
 
 
 
 
$
3,096,974


$
2,853,909

(1) Corporate and Other includes amounts previously included in the SemStream segment which ceased to be a reportable segment in the second quarter of 2016. See Note 3 for additional information.
 
 
 
 
 
 
 
 
 
 
 
 
 
June 30,
2016
 
December 31,
2015
Equity investments:
 
 
 
 
 
 
 
   Crude Transportation
 
 
 
 
$
427,961

 
$
438,291

   Corporate and Other(1)
 
 
 
 
18,977

 
112,787

Total equity investments
 
 
 
 
$
446,938


$
551,078

(1) Corporate and Other includes amounts previously included in the SemStream segment which ceased to be a reportable segment in the second quarter of 2016. See Note 3 for additional information.
Inventories (Tables)
Components Of Inventories
Inventories consist of the following (in thousands):
 
June 30,
2016
 
December 31,
2015
Crude oil
$
76,343

 
$
59,121

Asphalt and other
9,117

 
11,118

Total inventories
$
85,460

 
$
70,239

Financial Instruments (Tables)
Fair Value of Financial Assets and Liabilities 
The tables below summarize the balances of commodity derivative assets and liabilities at June 30, 2016 and December 31, 2015 (in thousands):

 
June 30, 2016
 
December 31, 2015
Derivatives subject to netting arrangements:
Level 1
 
Netting*
 
Total
 
Level 1
 
Netting*
 
Total
Commodity derivatives:
 
 
 
 

 
 
 
 
 

Assets
$
1,160

 
$
(1,160
)
 
$
—

 
$
131

 
$
(131
)
 
$
—

Liabilities
$
1,428

 
$
(1,160
)
 
$
268

 
$
470

 
$
(131
)
 
$
339

*Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.
Schedule of Notional Quantities for Commodity Derivative Instruments 
The following table sets forth the notional quantities for commodity derivative instruments entered into (in thousands of barrels):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Sales
5,890

 
7,721

 
16,310

 
13,452

Purchases
5,743

 
7,508

 
16,253

 
13,413

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] 
We have recorded the fair value of our commodity derivative instruments on our condensed consolidated balance sheets in other current assets and other current liabilities in the following amounts (in thousands):
 
June 30, 2016
 
December 31, 2015
 
Assets
 
Liabilities
 
Assets
 
Liabilities
Commodity contracts
$
—

 
$
268

 
$
—

 
$
339

Schedule of Realized and Unrealized Gains (Losses) from Commodity Derivatives 
Realized and unrealized gains (losses) from our commodity derivatives were recorded to product revenue in the following amounts (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Commodity contracts
$
(7,127
)
 
$
(2,202
)
 
$
(3,773
)
 
$
(2,268
)
Long-Term Debt (Tables)
Summary of Long-Term Debt
Our long-term debt consisted of the following (in thousands):
 
June 30,
2016
 
December 31,
2015
SemGroup 7.50% senior unsecured notes due 2021
$
300,000

 
$
300,000

Unamortized debt issuance costs on SemGroup notes
(4,125
)
 
(4,540
)
SemGroup 7.50% senior unsecured notes due 2021, net
295,875

 
295,460




 


Rose Rock 5.625% senior unsecured notes due 2022
400,000

 
400,000

Unamortized debt issuance costs on Rose Rock 2022 notes
(6,442
)
 
(6,975
)
Rose Rock 5.625% senior unsecured notes due 2022, net
393,558

 
393,025

 
 
 
 
Rose Rock 5.625% senior unsecured notes due 2023
350,000

 
350,000

Unamortized discount on Rose Rock 2023 notes
(5,178
)
 
(5,455
)
Unamortized debt issuance costs on Rose Rock 2023 notes
(4,931
)
 
(5,266
)
Rose Rock 5.625% senior unsecured notes due 2023, net
339,891

 
339,279

 
 
 
 
SemGroup corporate revolving credit facility
—

 
30,000

Rose Rock revolving credit facility
41,000

 
—

SemMexico revolving credit facility
—

 
—

Capital leases
64

 
83

Total long-term debt, net
1,070,388

 
1,057,847

Less: current portion of long-term debt
25

 
31

Noncurrent portion of long-term debt, net
$
1,070,363

 
$
1,057,816

Commitments and Contingencies (Tables)
Summary Of Purchase And Sale Commitments 
We account for derivatives at fair value with the exception of commitments which have been designated as normal purchases and sales for which we do not record assets or liabilities related to these agreements until the product is purchased or sold. At June 30, 2016, such commitments included the following (in thousands):
 
Volume
(Barrels)
 
Value
Fixed price purchases
3,528

 
$
167,030

Fixed price sales
4,563

 
$
218,212

Floating price purchases
12,701

 
$
601,820

Floating price sales
17,773

 
$
786,992

Long-term Purchase Commitment [Table Text Block] 
The approximate amount of future obligation is as follows (in thousands):
For year ending:
 
December 31, 2016
$
5,951

December 31, 2017
11,938

December 31, 2018
10,060

December 31, 2019
9,121

December 31, 2020
8,451

Thereafter
15,940

Total expected future payments
$
61,461

Equity (Tables)
Changes In Condensed Consolidated Owners' Equity 
The following table shows the changes in our consolidated owners’ equity accounts from December 31, 2015 to June 30, 2016 (in thousands):
 
Common
Stock
Additional
Paid-in
Capital
Treasury
Stock
Accumulated
Deficit
Accumulated
Other
Comprehensive
Loss
Noncontrolling
Interests
Total
Owners’
Equity
Balance at December 31, 2015
$
439

$
1,217,255

$
(5,593
)
$
(38,012
)
$
(58,562
)
$
80,829

$
1,196,356

Net income (loss)
—

—

—

(7,259
)
—

10,942

3,683

Other comprehensive income, net of income taxes
—

—

—

—

2,482

—

2,482

Issuance of common shares
86

228,460

—

—

—

—

228,546

Distributions to noncontrolling interests
—

—

—

—

—

(21,485
)
(21,485
)
Dividends paid
—

(39,720
)
—

—

—

—

(39,720
)
Unvested dividend equivalent rights
—

206

—

—

—

66

272

Non-cash equity compensation
—

4,592

—

—

—

731

5,323

Issuance of common stock under compensation plans
1

774

—

—

—

—

775

Repurchase of common stock
—

—

(904
)
—

—

—

(904
)
Balance at June 30, 2016
$
526

$
1,411,567

$
(6,497
)
$
(45,271
)
$
(56,080
)
$
71,083

$
1,375,328


Components of Accumulated Other Comprehensive Loss 
The following table presents the changes in the components of accumulated other comprehensive loss from December 31, 2015 to June 30, 2016 (in thousands):
 
Currency
Translation
 
Employee
Benefit
Plans
 
Total
Balance at December 31, 2015
$
(57,201
)
 
$
(1,361
)
 
$
(58,562
)
Currency translation adjustment, net of income tax expense of $1,589
2,608

 
—

 
2,608

Changes related to benefit plans, net of income tax benefit of $42
—

 
(126
)
 
(126
)
Balance at June 30, 2016
$
(54,593
)
 
$
(1,487
)
 
$
(56,080
)
Dividends Declared [Table Text Block] 
The following table sets forth the quarterly dividends per share declared and/or paid to shareholders for the periods indicated:
Quarter Ending
 
Dividend Per Share
 
Date of Record
 
Date Paid
March 31, 2015
 
$
0.34

 
March 9, 2015
 
March 20, 2015
June 30, 2015
 
$
0.38

 
May 18, 2015
 
May 29, 2015
September 30, 2015
 
$
0.42

 
August 17, 2015
 
August 25, 2015
December 31, 2015
 
$
0.45

 
November 16, 2015
 
November 24, 2015
March 31, 2016
 
$
0.45

 
March 7, 2016
 
March 17, 2016
June 30, 2016
 
$
0.45

 
May 16, 2016
 
May 26, 2016
September 30, 2016
 
$
0.45

 
August 15, 2016
 
August 25, 2016
Earnings Per Share (Tables)
Basic and diluted earnings per share
The following summarizes the calculation of basic earnings per share for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per share amounts):
 
Three Months Ended June 30, 2016
 
Three Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
9,933

 
$
(2
)
 
$
9,931

 
$
28,435

 
$
(2
)
 
$
28,433

less: Income attributable to noncontrolling interests
1,922

 
—

 
1,922

 
5,136

 
—

 
5,136

Income (loss) attributable to SemGroup
$
8,011

 
$
(2
)
 
$
8,009

 
$
23,299

 
$
(2
)
 
$
23,297

Weighted average common stock outstanding
45,236

 
45,236

 
45,236

 
43,798

 
43,798

 
43,798

Basic earnings (loss) per share
$
0.18

 
$
—

 
$
0.18

 
$
0.53

 
$
—

 
$
0.53

 
Six Months Ended June 30, 2016
 
Six Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
3,687

 
$
(4
)
 
$
3,683

 
$
34,211

 
$
(2
)
 
$
34,209

less: Income attributable to noncontrolling interests
10,942

 
—

 
10,942

 
9,446

 
—

 
9,446

Income (loss) attributable to SemGroup
$
(7,255
)
 
$
(4
)
 
$
(7,259
)
 
$
24,765

 
$
(2
)
 
$
24,763

Weighted average common stock outstanding
44,553

 
44,553

 
44,553

 
43,758

 
43,758

 
43,758

Basic earnings (loss) per share
$
(0.16
)
 
$
—

 
$
(0.16
)
 
$
0.57

 
$
—

 
$
0.57


The following summarizes the calculation of diluted earnings per share for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per share amounts):

 
Three Months Ended June 30, 2016
 
Three Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
9,933

 
$
(2
)
 
$
9,931

 
$
28,435

 
$
(2
)
 
$
28,433

less: Income attributable to noncontrolling interests
1,922

 
—

 
1,922

 
5,136

 
—

 
5,136

Income (loss) attributable to SemGroup
$
8,011

 
$
(2
)
 
$
8,009

 
$
23,299

 
$
(2
)
 
$
23,297

Weighted average common stock outstanding
45,236

 
45,236

 
45,236

 
43,798

 
43,798

 
43,798

Effect of dilutive securities
411

 
411

 
411

 
215

 
215

 
215

Diluted weighted average common stock outstanding
45,647

 
45,647

 
45,647

 
44,013

 
44,013

 
44,013

Diluted earnings (loss) per share
$
0.18

 
$
—

 
$
0.18

 
$
0.53

 
$
—

 
$
0.53




 
Six Months Ended June 30, 2016
 
Six Months Ended June 30, 2015
 
Continuing
Operations
 
Discontinued
Operations
 
Net
 
Continuing
Operations
 
Discontinued
Operations
 
Net
Income (loss)
$
3,687

 
$
(4
)
 
$
3,683

 
$
34,211

 
$
(2
)
 
$
34,209

less: Income attributable to noncontrolling interests
10,942

 
—

 
10,942

 
9,446

 
—

 
9,446

Income (loss) attributable to SemGroup
$
(7,255
)
 
$
(4
)
 
$
(7,259
)
 
$
24,765

 
$
(2
)
 
$
24,763

Weighted average common stock outstanding
44,553

 
44,553

 
44,553

 
43,758

 
43,758

 
43,758

Effect of dilutive securities
—

 
—

 
—

 
217

 
217

 
217

Diluted weighted average common stock outstanding
44,553

 
44,553

 
44,553

 
43,975

 
43,975

 
43,975

Diluted earnings (loss) per share
$
(0.16
)
 
$
—

 
$
(0.16
)
 
$
0.56

 
$
—

 
$
0.56


Supplemental Cash Flow Information (Tables)
Schedule of Changes in Operating Assets and Liabilities
The following table summarizes the changes in the components of operating assets and liabilities shown on our condensed consolidated statements of cash flows (in thousands):

 
Six Months Ended June 30,
 
2016
 
2015
Decrease (increase) in restricted cash
$
1

 
$
6,766

Decrease (increase) in accounts receivable
(60,062
)
 
(2,248
)
Decrease (increase) in receivable from affiliates
(4,305
)
 
(1,353
)
Decrease (increase) in inventories
(15,918
)
 
(36,065
)
Decrease (increase) in derivatives and margin deposits
(2,163
)
 
(287
)
Decrease (increase) in other current assets
956

 
(3,134
)
Decrease (increase) in other assets
(1,266
)
 
(2,096
)
Increase (decrease) in accounts payable and accrued liabilities
60,867

 
18,730

Increase (decrease) in payable to affiliates
3,997

 
5,580

Increase (decrease) in payables to pre-petition creditors
—

 
(3,836
)
Increase (decrease) in other noncurrent liabilities
(1,453
)
 
47

 
$
(19,346
)
 
$
(17,896
)
Related Party Transactions (Tables)
Related Party Transactions
During the three months and six months ended June 30, 2016 and 2015, we generated the following transactions with NGL Energy and its subsidiaries (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Revenues
$
8,303

 
$
74,447

 
$
16,832

 
$
119,916

Purchases
$
6,366

 
$
75,027

 
$
13,196

 
$
110,261

Reimbursements from NGL Energy for services
$
—

 
$
14

 
$
—

 
$
56

Condensed Consolidating Guarantor Financial Statements (Tables)
Schedule of Condensed Balance Sheet [Table Text Block] 
Condensed Consolidating Guarantor Balance Sheets
 
 
June 30, 2016
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
ASSETS
 
 
 
 
 
 
 
 
 
 
Current assets:
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
187,987

 
$
—

 
$
68,614

 
$
(821
)
 
$
255,780

Restricted cash
 
—

 
—

 
31

 
—

 
31

Accounts receivable, net
 
641

 
12,596

 
375,431

 
—

 
388,668

Receivable from affiliates
 
4,897

 
802

 
9,467

 
(4,947
)
 
10,219

Inventories
 
—

 
(120
)
 
85,580

 
—

 
85,460

Other current assets
 
9,228

 
742

 
15,475

 
—

 
25,445

Total current assets
 
202,753

 
14,020


554,598


(5,768
)

765,603

Property, plant and equipment, net
 
4,915

 
532,702

 
1,111,345

 
—

 
1,648,962

Equity method investments
 
1,502,156

 
510,115

 
427,961

 
(1,993,294
)
 
446,938

Goodwill
 
—

 
—

 
34,698

 
—

 
34,698

Other intangible assets, net
 
18

 
140,083

 
16,516

 
—

 
156,617

Other noncurrent assets
 
38,780

 
778

 
4,598

 
—

 
44,156

Total assets
 
$
1,748,622

 
$
1,197,698


$
2,149,716


$
(1,999,062
)

$
3,096,974

LIABILITIES AND OWNERS’ EQUITY
 
 
 
 
 
 
 
 
 
 
Current liabilities:
 
 
 
 
 
 
 
 
 
 
Accounts payable
 
$
533

 
$
11,346

 
$
326,841

 
$
—

 
$
338,720

Payable to affiliates
 
53

 
21

 
13,903

 
(4,947
)
 
9,030

Accrued liabilities
 
9,392

 
11,511

 
63,796

 
4

 
84,703

Other current liabilities
 
364

 
—

 
11,146

 
—

 
11,510

Total current liabilities
 
10,342

 
22,878

 
415,686

 
(4,943
)
 
443,963

Long-term debt, net
 
295,875

 
6,640

 
790,988

 
(23,140
)
 
1,070,363

Deferred income taxes
 
135,985

 
—

 
47,791

 
—

 
183,776

Other noncurrent liabilities
 
2,175

 
—

 
21,369

 
—

 
23,544

Commitments and contingencies
 


 


 


 


 


Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
 
1,304,245

 
1,168,180

 
802,799

 
(1,970,979
)
 
1,304,245

Noncontrolling interests in consolidated subsidiaries
 
—

 
—

 
71,083

 
—

 
71,083

Total owners’ equity
 
1,304,245

 
1,168,180


873,882


(1,970,979
)

1,375,328

Total liabilities and owners’ equity
 
$
1,748,622


$
1,197,698

 
$
2,149,716

 
$
(1,999,062
)
 
$
3,096,974


 
 
December 31, 2015
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
ASSETS
 
 
 
 
 
 
 
 
 
 
Current assets:
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
4,559

 
$
—

 
$
55,101

 
$
(1,564
)
 
$
58,096

Restricted cash
 
—

 
—

 
32

 
—

 
32

Accounts receivable, net
 
640

 
20,015

 
306,058

 
—

 
326,713

Receivable from affiliates
 
1,616

 
1,119

 
6,141

 
(2,962
)
 
5,914

Inventories
 
—

 
(48
)
 
70,287

 
—

 
70,239

Other current assets
 
8,477

 
359

 
10,551

 
—

 
19,387

Total current assets
 
15,292

 
21,445


448,170


(4,526
)

480,381

Property, plant and equipment, net
 
4,335

 
536,628

 
1,025,858

 
—

 
1,566,821

Equity method investments
 
1,546,853

 
426,801

 
438,291

 
(1,860,867
)
 
551,078

Goodwill
 
—

 
13,052

 
34,980

 
—

 
48,032

Other intangible assets, net
 
20

 
144,183

 
18,020

 
—

 
162,223

Other noncurrent assets
 
39,358

 
881

 
5,135

 
—

 
45,374

Total assets
 
$
1,605,858

 
$
1,142,990


$
1,970,454


$
(1,865,393
)

$
2,853,909

LIABILITIES AND OWNERS’ EQUITY
 
 
 
 
 
 
 
 
 
 
Current liabilities:
 
 
 
 
 
 
 
 
 
 
Accounts payable
 
$
734

 
$
11,221

 
$
261,711

 
$
—

 
$
273,666

Payable to affiliates
 
78

 
155

 
7,762

 
(2,962
)
 
5,033

Accrued liabilities
 
5,551

 
10,957

 
68,534

 
5

 
85,047

Other current liabilities
 
569

 
—

 
12,712

 
—

 
13,281

Total current liabilities
 
6,932

 
22,333

 
350,719

 
(2,957
)
 
377,027

Long-term debt, net
 
325,460

 
7,340

 
748,856

 
(23,840
)
 
1,057,816

Deferred income taxes
 
155,411

 
—

 
45,542

 
—

 
200,953

Other noncurrent liabilities
 
2,528

 
—

 
19,229

 
—

 
21,757

Commitments and contingencies
 


 


 


 


 


Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
 
1,115,527

 
1,113,317

 
725,279

 
(1,838,596
)
 
1,115,527

Noncontrolling interests in consolidated subsidiaries
 
—

 
—

 
80,829

 
—

 
80,829

Total owners’ equity
 
1,115,527

 
1,113,317


806,108


(1,838,596
)

1,196,356

Total liabilities and owners’ equity
 
$
1,605,858

 
$
1,142,990


$
1,970,454


$
(1,865,393
)

$
2,853,909

Schedule of Condensed Income Statement [Table Text Block] 
Condensed Consolidating Guarantor Statements of Operations
 
Three Months Ended June 30, 2016
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
39,849

 
$
172,798

 
$
(2,521
)
 
$
210,126

Service
—

 
10,872

 
51,328

 
—

 
62,200

Other
—

 
—

 
15,051

 
—

 
15,051

Total revenues
—


50,721


239,177


(2,521
)

287,377

Expenses:
 
 
 
 
 
 
 
 

Costs of products sold, exclusive of depreciation and amortization shown below
—

 
27,171

 
152,192

 
(2,521
)
 
176,842

Operating
—

 
9,192

 
45,515

 
—

 
54,707

General and administrative
4,782

 
2,379

 
13,614

 
—

 
20,775

Depreciation and amortization
393

 
9,146

 
15,509

 
—

 
25,048

Loss (gain) on disposal or impairment of long-lived assets, net
—

 
(1
)
 
1,686

 
—

 
1,685

Total expenses
5,175


47,887


228,516


(2,521
)

279,057

Earnings from equity method investments
6,557

 
9,034

 
17,077

 
(15,590
)
 
17,078

Operating income
1,382


11,868


27,738


(15,590
)

25,398

Other expenses (income), net:
 
 
 
 
 
 
 
 

Interest expense (income)
(936
)
 
8,333

 
11,714

 
(236
)
 
18,875

Foreign currency transaction loss
—

 
—

 
1,543

 
—

 
1,543

Gain on sale of equity method investment
(9,120
)
 
—

 
—

 
—

 
(9,120
)
Other income, net
(249
)
 
—

 
(478
)
 
236

 
(491
)
Total other expense (income), net
(10,305
)

8,333


12,779


—


10,807

Income from continuing operations before income taxes
11,687


3,535


14,959


(15,590
)

14,591

Income tax expense
3,679

 
—

 
979

 
—

 
4,658

Income from continuing operations
8,008


3,535


13,980


(15,590
)

9,933

Loss from discontinued operations, net of income taxes
—

 
(1
)
 
(1
)
 
—

 
(2
)
Net income
8,008


3,534


13,979


(15,590
)

9,931

Less: net income attributable to noncontrolling interests
—

 
—

 
1,922

 
—

 
1,922

Net income attributable to SemGroup
$
8,008


$
3,534


$
12,057


$
(15,590
)

$
8,009

Net income
$
8,008

 
$
3,534


$
13,979


$
(15,590
)

$
9,931

Other comprehensive income (loss), net of income taxes
18,480

 
485

 
(12,374
)
 
—

 
6,591

Comprehensive income
26,488

 
4,019


1,605


(15,590
)

16,522

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
1,922

 
—

 
1,922

Comprehensive income (loss) attributable to SemGroup
$
26,488

 
$
4,019


$
(317
)

$
(15,590
)

$
14,600

 
Three Months Ended June 30, 2015
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
50,293

 
$
244,886

 
$
(6,443
)
 
$
288,736

Service
—

 
15,743

 
50,861

 
—

 
66,604

Other
—

 
—

 
21,886

 
—

 
21,886

Total revenues
—

 
66,036


317,633


(6,443
)

377,226

Expenses:
 
 
 
 
 
 
 
 
 
Costs of products sold, exclusive of depreciation and amortization shown below
—

 
35,632

 
214,969

 
(6,443
)
 
244,158

Operating
—

 
8,822

 
51,978

 
—

 
60,800

General and administrative
4,626

 
2,642

 
15,649

 
—

 
22,917

Depreciation and amortization
329

 
7,255

 
17,090

 
—

 
24,674

Loss on disposal or impairment of long-lived assets, net
—

 
108

 
1,264

 
—

 
1,372

Total expenses
4,955

 
54,459


300,950


(6,443
)

353,921

Earnings from equity method investments
28,583

 
15,048

 
17,683

 
(37,411
)
 
23,903

Gain on issuance of common units by equity method investee
5,897

 
—

 
—

 
—

 
5,897

Operating income
29,525

 
26,625


34,366


(37,411
)

53,105

Other expenses (income), net:
 
 
 
 
 
 
 
 
 
Interest expense
781

 
6,160

 
10,614

 
(733
)
 
16,822

Foreign currency transaction gain
(5
)
 
—

 
(290
)
 
—

 
(295
)
Gain on sale of equity method investment
(6,623
)
 
—

 
—

 
—

 
(6,623
)
Other income, net
(778
)
 
—

 
(50
)
 
733

 
(95
)
Total other expense (income), net
(6,625
)
 
6,160


10,274


—


9,809

Income from continuing operations before income taxes
36,150

 
20,465


24,092


(37,411
)

43,296

Income tax expense
12,853

 
—

 
2,008

 
—

 
14,861

Income from continuing operations
23,297

 
20,465


22,084


(37,411
)

28,435

Loss from discontinued operations, net of income taxes
—

 
(1
)
 
(1
)
 
—

 
(2
)
Net income
23,297

 
20,464


22,083


(37,411
)

28,433

Less: net income attributable to noncontrolling interests
—

 
—

 
5,136

 
—

 
5,136

Net income attributable to SemGroup
$
23,297

 
$
20,464


$
16,947


$
(37,411
)

$
23,297

Net income
$
23,297

 
$
20,464


$
22,083


$
(37,411
)

$
28,433

Other comprehensive income (loss), net of income taxes
(2,346
)
 
—

 
7,866

 
—

 
5,520

Comprehensive income
20,951

 
20,464


29,949


(37,411
)

33,953

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
5,136

 
—

 
5,136

Comprehensive income attributable to SemGroup
$
20,951

 
$
20,464


$
24,813


$
(37,411
)

$
28,817

 
Six Months Ended June 30, 2016
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
73,247

 
$
379,042

 
$
(5,267
)
 
$
447,022

Service
—

 
23,740

 
102,533

 
—

 
126,273

Other
—

 
—

 
28,933

 
—

 
28,933

Total revenues
—

 
96,987


510,508


(5,267
)

602,228

Expenses:
 
 
 
 
 
 
 
 

Costs of products sold, exclusive of depreciation and amortization shown below
—

 
51,780

 
327,276

 
(5,267
)
 
373,789

Operating
—

 
16,885

 
88,014

 
—

 
104,899

General and administrative
10,654

 
4,625

 
26,556

 
—

 
41,835

Depreciation and amortization
773

 
18,020

 
30,302

 
—

 
49,095

Loss on disposal of long-lived assets, net
—

 
13,051

 
1,941

 
—

 
14,992

Total expenses
11,427

 
104,361


474,089


(5,267
)

584,610

Earnings from equity method investments
13,147

 
28,214

 
37,917

 
(39,129
)
 
40,149

Loss on issuance of common units by equity method investee
(41
)
 
—

 
—

 
—

 
(41
)
Operating income
1,679

 
20,840


74,336


(39,129
)

57,726

Other expenses (income), net:
 
 
 
 
 
 
 
 

Interest expense (income)
(1,513
)
 
16,336

 
23,460

 
(473
)
 
37,810

Foreign currency transaction loss
—

 
—

 
3,012

 
—

 
3,012

Loss on sale or impairment of equity method investment
30,644

 
—

 
—

 
—

 
30,644

Other income, net
(487
)
 
—

 
(664
)
 
473

 
(678
)
Total other expenses, net
28,644

 
16,336


25,808


—


70,788

Income (loss) from continuing operations before income taxes
(26,965
)
 
4,504


48,528


(39,129
)

(13,062
)
Income tax expense (benefit)
(19,706
)
 
—

 
2,957

 
—

 
(16,749
)
Income (loss) from continuing operations
(7,259
)
 
4,504


45,571


(39,129
)

3,687

Loss from discontinued operations, net of income taxes
—

 
(3
)
 
(1
)
 
—

 
(4
)
Net income (loss)
(7,259
)
 
4,501


45,570


(39,129
)

3,683

Less: net income attributable to noncontrolling interests
—

 
—

 
10,942

 
—

 
10,942

Net income (loss) attributable to SemGroup
$
(7,259
)
 
$
4,501


$
34,628


$
(39,129
)

$
(7,259
)
Net income (loss)
$
(7,259
)
 
$
4,501


$
45,570


$
(39,129
)

$
3,683

Other comprehensive income (loss), net of income taxes
(1,986
)
 
701

 
3,767

 
—

 
2,482

Comprehensive income (loss)
(9,245
)
 
5,202


49,337


(39,129
)

6,165

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
10,942

 
—

 
10,942

Comprehensive income (loss) attributable to SemGroup
$
(9,245
)
 
$
5,202


$
38,395


$
(39,129
)

$
(4,777
)
 
Six Months Ended June 30, 2015
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Revenues:
 
 
 
 
 
 
 
 
 
Product
$
—

 
$
101,346

 
$
419,938

 
$
(12,417
)
 
$
508,867

Service
—

 
30,202

 
98,279

 
—

 
128,481

Other
—

 
—

 
38,188

 
—

 
38,188

Total revenues
—

 
131,548

 
556,405

 
(12,417
)
 
675,536

Expenses:
 
 
 
 
 
 
 
 
 
Costs of products sold, exclusive of depreciation and amortization shown below
—

 
76,300

 
372,347

 
(12,417
)
 
436,230

Operating
—

 
16,936

 
96,954

 
—

 
113,890

General and administrative
22,228

 
4,706

 
28,293

 
—

 
55,227

Depreciation and amortization
623

 
14,288

 
33,497

 
—

 
48,408

Loss on disposal of long-lived assets, net
—

 
107

 
2,323

 
—

 
2,430

Total expenses
22,851

 
112,337

 
533,414

 
(12,417
)
 
656,185

Earnings from equity method investments
43,388

 
27,576

 
38,547

 
(65,049
)
 
44,462

Gain on issuance of common units by equity method investee
5,897

 
—

 
—

 
—

 
5,897

Operating income
26,434

 
46,787

 
61,538

 
(65,049
)
 
69,710

Other expenses (income), net:
 
 
 
 
 
 
 
 
 
Interest expense
2,203

 
11,651

 
19,058

 
(1,499
)
 
31,413

Foreign currency transaction gain
(5
)
 
—

 
(809
)
 
—

 
(814
)
Gain on sale of equity method investment
(14,517
)
 
—

 
—

 
—

 
(14,517
)
Other income, net
(1,570
)
 
—

 
(115
)
 
1,499

 
(186
)
Total other expenses (income), net
(13,889
)
 
11,651

 
18,134

 
—

 
15,896

Income from continuing operations before income taxes
40,323

 
35,136

 
43,404

 
(65,049
)
 
53,814

Income tax expense
15,560

 
—

 
4,043

 
—

 
19,603

Income from continuing operations
24,763

 
35,136

 
39,361

 
(65,049
)
 
34,211

Loss from discontinued operations, net of income taxes
—

 
(1
)
 
(1
)
 
—

 
(2
)
Net income
24,763

 
35,135

 
39,360

 
(65,049
)
 
34,209

Less: net income attributable to noncontrolling interests
—

 
—

 
9,446

 
—

 
9,446

Net income attributable to SemGroup
$
24,763

 
$
35,135

 
$
29,914

 
$
(65,049
)
 
$
24,763

Net income
24,763

 
35,135

 
39,360

 
(65,049
)
 
34,209

Other comprehensive income (loss), net of income taxes
6,300

 
—

 
(9,840
)
 
—

 
(3,540
)
Comprehensive income
31,063

 
35,135

 
29,520

 
(65,049
)
 
30,669

Less: comprehensive income attributable to noncontrolling interests
—

 
—

 
9,446

 
—

 
9,446

Comprehensive income attributable to SemGroup
$
31,063

 
$
35,135

 
$
20,074

 
$
(65,049
)
 
$
21,223

Schedule of Condensed Cash Flow Statement [Table Text Block] 
Condensed Consolidating Guarantor Statements of Cash Flows
 
 
Six Months Ended June 30, 2016
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Net cash provided by operating activities
 
$
25,427

 
$
17,351

 
$
56,585

 
$
(25,448
)
 
$
73,915

Cash flows from investing activities:
 
 
 
 
 
 
 
 
 

Capital expenditures
 
(1,350
)
 
(11,211
)
 
(114,151
)
 
—

 
(126,712
)
Proceeds from sale of long-lived assets
 
—

 
—

 
114

 
—

 
114

Contributions to equity method investments
 
—

 
—

 
(3,448
)
 
—

 
(3,448
)
Proceeds from sale of common units of equity method investee
 
60,483

 
—

 
—

 
—

 
60,483

Distributions in excess of equity in earnings of affiliates
 
13,767

 
—

 
13,778

 
(13,767
)
 
13,778

Net cash provided by (used in) investing activities
 
72,900


(11,211
)

(103,707
)

(13,767
)
 
(55,785
)
Cash flows from financing activities:
 
 
 
 
 
 
 
 
 

Borrowings on credit facilities
 
118,000

 
—

 
165,500

 
—

 
283,500

Principal payments on credit facilities and other obligations
 
(148,367
)
 
—

 
(124,514
)
 
—

 
(272,881
)
Proceeds from issuance of common units, net of offering costs
 
228,546

 
—

 
—

 
—

 
228,546

Distributions to noncontrolling interests
 
—

 
—

 
(21,485
)
 
—

 
(21,485
)
Repurchase of common stock for payment of statutory taxes due on equity-based compensation
 
(904
)
 
—

 
—

 
—

 
(904
)
Dividends paid
 
(39,720
)
 
—

 
—

 
—

 
(39,720
)
Proceeds from issuance of common stock under employee stock purchase plan
 
555

 
—

 
—

 
—

 
555

Intercompany borrowings (advances), net
 
(73,009
)
 
(6,140
)
 
39,191

 
39,958

 
—

Net cash provided by (used in) financing activities
 
85,101

 
(6,140
)

58,692


39,958

 
177,611

Effect of exchange rate changes on cash and cash equivalents
 
—

 
—

 
1,943

 
—

 
1,943

Change in cash and cash equivalents
 
183,428

 
—


13,513


743

 
197,684

Cash and cash equivalents at beginning of period
 
4,559

 
—

 
55,101

 
(1,564
)
 
58,096

Cash and cash equivalents at end of period
 
$
187,987

 
$
—


$
68,614


$
(821
)
 
$
255,780


 
 
Six Months Ended June 30, 2015
 
 
Parent
 
Guarantors
 
Non-guarantors
 
Consolidating Adjustments
 
Consolidated
Net cash provided by operating activities
 
$
19,092

 
$
18,222

 
$
55,462

 
$
(19,819
)
 
$
72,957

Cash flows from investing activities:
 
 
 
 
 
 
 
 
 
 
Capital expenditures
 
(1,105
)
 
(73,195
)
 
(162,656
)
 
—

 
(236,956
)
Proceeds from sale of long-lived assets
 
—

 
20

 
210

 
—

 
230

Proceeds from the sale of Wattenberg Holding, LLC and Glass Mountain Holding, LLC to Rose Rock Midstream L.P.
 
251,181

 
—

 
—

 
(251,181
)
 
—

Contributions to equity method investments
 
—

 
—

 
(23,461
)
 
—

 
(23,461
)
Proceeds from sale of common units of equity method investee
 
56,318

 
—

 
—

 
—

 
56,318

Distributions in excess of equity in earnings of affiliates
 
11,676

 
—

 
13,077

 
(11,676
)
 
13,077

Net cash provided by (used in) investing activities
 
318,070

 
(73,175
)

(172,830
)

(262,857
)
 
(190,792
)
Cash flows from financing activities:
 
 
 
 
 
 
 
 
 

Debt issuance costs
 
(601
)
 
—

 
(5,688
)
 
—

 
(6,289
)
Borrowings on credit facilities and issuance of senior secured notes, net of discount
 
126,000

 
—

 
676,208

 
—

 
802,208

Principal payments on credit facilities and other obligations
 
(161,000
)
 
—

 
(364,024
)
 
—

 
(525,024
)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs
 
—

 
—

 
89,119

 
—

 
89,119

Distributions to noncontrolling interests
 
—

 
—

 
(19,261
)
 
—

 
(19,261
)
Repurchase of common stock for payment of statutory taxes due on equity-based compensation
 
(4,254
)
 
—

 
—

 
—

 
(4,254
)
Dividends paid
 
(31,478
)
 
—

 
—

 
—

 
(31,478
)
Proceeds from issuance of common stock under employee stock purchase plan
 
609

 
—

 
—

 
—

 
609

Intercompany borrowing (advances), net
 
(157,632
)
 
54,953

 
(181,841
)
 
284,520

 
—

Net cash provided by (used in) financing activities
 
(228,356
)
 
54,953


194,513


284,520

 
305,630

Effect of exchange rate changes on cash and cash equivalents
 
—

 
—

 
390

 
—

 
390

Change in cash and cash equivalents
 
108,806

 
—


77,535


1,844

 
188,185

Cash and cash equivalents at beginning of period
 
9,254

 
—

 
35,445

 
(4,101
)
 
40,598

Cash and cash equivalents at end of period
 
$
118,060

 
$
—


$
112,980


$
(2,257
)
 
$
228,783

Overview (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
 
Unamortized Debt Issuance Expense
$ 16.8 
Rose Rock Midstream, L.P. -Distributions (Details) (USD $)
0 Months Ended 6 Months Ended 0 Months Ended
Feb. 13, 2015
Distribution of Q4 2014 earnings [Member]
May 15, 2015
Distribution of Q1 2015 earnings [Member]
Aug. 14, 2015
Distribution of Q2 2015 earnings [Member]
Nov. 13, 2015
Distribution of Q3 2015 Earnings [Member]
Feb. 12, 2016
Distribution of Q4 2015 Earnings [Member]
May 13, 2016
Distribution of Q1 2016 Earnings [Member]
Jun. 30, 2016
Distribution of Q2 2016 Earnings [Member]
Aug. 12, 2016
Subsequent Event [Member]
Distribution of Q2 2016 Earnings [Member]
Feb. 13, 2015
Parent [Member]
General Partner [Member]
Distribution of Q4 2014 earnings [Member]
May 15, 2015
Parent [Member]
General Partner [Member]
Distribution of Q1 2015 earnings [Member]
Aug. 14, 2015
Parent [Member]
General Partner [Member]
Distribution of Q2 2015 earnings [Member]
Nov. 13, 2015
Parent [Member]
General Partner [Member]
Distribution of Q3 2015 Earnings [Member]
Feb. 12, 2016
Parent [Member]
General Partner [Member]
Distribution of Q4 2015 Earnings [Member]
May 13, 2016
Parent [Member]
General Partner [Member]
Distribution of Q1 2016 Earnings [Member]
Aug. 12, 2016
Parent [Member]
General Partner [Member]
Subsequent Event [Member]
Distribution of Q2 2016 Earnings [Member]
Feb. 13, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q4 2014 earnings [Member]
Common Units [Member]
Feb. 13, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q4 2014 earnings [Member]
Subordinated Units [Member]
May 15, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q1 2015 earnings [Member]
Common Units [Member]
May 15, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q1 2015 earnings [Member]
Subordinated Units [Member]
Aug. 14, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q2 2015 earnings [Member]
Common Units [Member]
Aug. 14, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q2 2015 earnings [Member]
Subordinated Units [Member]
Nov. 13, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q3 2015 Earnings [Member]
Common Units [Member]
Nov. 13, 2015
Parent [Member]
Limited Partner [Member]
Distribution of Q3 2015 Earnings [Member]
Subordinated Units [Member]
Feb. 12, 2016
Parent [Member]
Limited Partner [Member]
Distribution of Q4 2015 Earnings [Member]
Common Units [Member]
Feb. 12, 2016
Parent [Member]
Limited Partner [Member]
Distribution of Q4 2015 Earnings [Member]
Subordinated Units [Member]
May 13, 2016
Parent [Member]
Limited Partner [Member]
Distribution of Q1 2016 Earnings [Member]
Common Units [Member]
May 13, 2016
Parent [Member]
Limited Partner [Member]
Distribution of Q1 2016 Earnings [Member]
Subordinated Units [Member]
Aug. 12, 2016
Parent [Member]
Limited Partner [Member]
Subsequent Event [Member]
Distribution of Q2 2016 Earnings [Member]
Common Units [Member]
Aug. 12, 2016
Parent [Member]
Limited Partner [Member]
Subsequent Event [Member]
Distribution of Q2 2016 Earnings [Member]
Subordinated Units [Member]
Feb. 13, 2015
Noncontrolling Interest [Member]
Limited Partner [Member]
Distribution of Q4 2014 earnings [Member]
Common Units [Member]
May 15, 2015
Noncontrolling Interest [Member]
Limited Partner [Member]
Distribution of Q1 2015 earnings [Member]
Common Units [Member]
Aug. 14, 2015
Noncontrolling Interest [Member]
Limited Partner [Member]
Distribution of Q2 2015 earnings [Member]
Common Units [Member]
Nov. 13, 2015
Noncontrolling Interest [Member]
Limited Partner [Member]
Distribution of Q3 2015 Earnings [Member]
Common Units [Member]
Feb. 12, 2016
Noncontrolling Interest [Member]
Limited Partner [Member]
Distribution of Q4 2015 Earnings [Member]
Common Units [Member]
May 13, 2016
Noncontrolling Interest [Member]
Limited Partner [Member]
Distribution of Q1 2016 Earnings [Member]
Common Units [Member]
Aug. 12, 2016
Noncontrolling Interest [Member]
Limited Partner [Member]
Subsequent Event [Member]
Distribution of Q2 2016 Earnings [Member]
Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Distribution per unit
$ 0.6200 
$ 0.6350 
$ 0.6500 
$ 0.6600 
$ 0.6600 
$ 0.6600 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Distribution Made to Limited Partner, Distribution Date
 
 
 
 
 
 
Aug. 12, 2016 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Distribution Made to Limited Partner, Date of Record
 
 
 
 
 
 
Aug. 02, 2016 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
General partner distributions
 
 
 
 
 
 
 
 
$ 485,000 
$ 568,000 
$ 590,000 
$ 604,000 
$ 604,000 
$ 605,000 
$ 605,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Incentive distributions
 
 
 
 
 
 
 
 
3,487,000 
4,450,000 
4,979,000 
5,333,000 
5,333,000 
5,338,000 
5,339,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Limited partner distributions
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6,551,000 
5,202,000 
13,148,000 
0 
13,458,000 
0 
13,665,000 
0 
13,665,000 
0 
13,665,000 
0 
 
 
8,544,000 
10,213,000 
10,456,000 
10,619,000 
10,622,000 
10,643,000 
 
Total distributions to partners
24,269,000 
28,379,000 
29,483,000 
30,221,000 
30,224,000 
30,251,000 
 
30,257,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Distribution Made to Limited Partner, Cash Distributions Declared
 
 
 
 
 
 
 
$ 0.6600 1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 13,665,000 
$ 0 
 
 
 
 
 
 
$ 10,648,000 
Rose Rock Midstream, L.P. - Summarized balance sheet information (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Summarized Balance Sheet Information
 
 
Other current assets
$ 25,445 
$ 19,387 
Property, plant and equipment, net
1,648,962 
1,566,821 
Equity method investments
446,938 
551,078 
Goodwill
34,698 
48,032 
Other noncurrent assets, net
44,156 
45,374 
Total assets
3,096,974 
2,853,909 
Current liabilities
443,963 
377,027 
Long-term debt, net
1,070,363 
1,057,816 
Total liabilities and owners’ equity
3,096,974 
2,853,909 
Rose Rock Midstream, L.P. [Member]
 
 
Summarized Balance Sheet Information
 
 
Cash
7,909 
9,059 
Other current assets
413,625 
310,555 
Property, plant and equipment, net
443,327 
441,596 
Equity method investments
427,961 
438,291 
Goodwill
26,628 
26,628 
Other noncurrent assets, net
17,978 
19,461 
Total assets
1,337,428 
1,245,590 
Current liabilities
356,248 
283,029 
Long-term debt, net
774,488 
732,356 
Partners’ capital attributable to SemGroup
135,609 
149,376 
Partners’ capital attributable to noncontrolling interests
71,083 
80,829 
Total liabilities and owners’ equity
$ 1,337,428 
$ 1,245,590 
Rose Rock Midstream, L.P. - Summarized income statement information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Summarized Income Statement Information
 
 
 
 
Revenue
$ 287,377 
$ 377,226 
$ 602,228 
$ 675,536 
Cost of products sold
176,842 
244,158 
373,789 
436,230 
Depreciation and amortization
25,048 
24,674 
49,095 
48,408 
Earnings from equity method investments
17,078 
23,903 
40,149 
44,462 
Net income
9,931 
28,433 
3,683 
34,209 
Rose Rock Midstream, L.P. [Member]
 
 
 
 
Summarized Income Statement Information
 
 
 
 
Revenue
169,144 
223,303 
373,095 
357,996 
Cost of products sold
128,763 
173,133 
280,154 
269,370 
Operating, general and administrative expenses
26,868 
29,985 
53,469 
56,556 
Depreciation and amortization
8,235 
10,608 
16,128 
20,751 
Earnings from equity method investments
17,078 
17,683 
37,917 
38,547 
Net income
$ 9,922 
$ 17,068 
$ 36,390 
$ 31,668 
Rose Rock Midstream, L.P. (Details Textual) (USD $)
6 Months Ended 6 Months Ended
Jun. 30, 2016
Limited Partner [Member]
Rose Rock Midstream, L.P. [Member]
Jun. 30, 2016
General Partner [Member]
Rose Rock Midstream, L.P. [Member]
Jun. 30, 2016
First Target Distribution [Member]
Minimum [Member]
May 30, 2016
SemGroup Merger Agreement [Member]
Jun. 30, 2016
Rose Rock merger agreement [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
 
 
 
 
 
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable,Unit for Unit Exchange Ratio
 
 
 
$ 0.8136 
 
General partner ownership interest
 
2.00% 
 
 
 
Limited partner ownership interest
55.10% 
 
 
 
 
Partners' minimum quarterly distribution per unit
 
 
0.3625 
 
 
Maximum reimbursable transaction related costs
 
 
 
 
3,800,000 
Merger termination contingent fee
 
 
 
 
$ 15,500,000 
Equity Method Investments - Investment balances (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
 
 
Equity method investments
$ 446,938 
$ 551,078 
White Cliffs Pipeline, L.L.C. [Member]
 
 
Schedule of Equity Method Investments [Line Items]
 
 
Equity method investments
290,668 
297,109 
NGL Energy Partners LP [Member]
 
 
Schedule of Equity Method Investments [Line Items]
 
 
Equity method investments
18,977 
112,787 
Glass Mountain Pipeline LLC [Member]
 
 
Schedule of Equity Method Investments [Line Items]
 
 
Equity method investments
$ 137,293 
$ 141,182 
Equity Method Investments - Equity earnings, by investment (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Earnings from equity method investments
$ 17,078 
$ 23,903 
$ 40,149 
$ 44,462 
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Earnings from equity method investments
16,428 
15,545 
36,208 
34,635 
NGL Energy Partners LP [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Earnings from equity method investments
0 1
6,220 1
2,232 1
5,915 1
Glass Mountain Pipeline LLC [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Earnings from equity method investments
$ 650 
$ 2,138 
$ 1,709 
$ 3,912 
Equity Method Investments - Distributions received, by investment (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Cash distributions received from equity method investments
$ 24,782 
$ 30,028 
$ 56,568 
$ 61,108 
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Cash distributions received from equity method investments
21,664 
20,551 
45,762 
44,705 
NGL Energy Partners LP [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Cash distributions received from equity method investments
0 
4,468 
4,873 
9,483 
Glass Mountain Pipeline LLC [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Cash distributions received from equity method investments
$ 3,118 
$ 5,009 
$ 5,933 
$ 6,920 
Equity Method Investments - Summarized financial information - White Cliffs (Details) (White Cliffs Pipeline, L.L.C. [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
Summarized income statement information
 
 
 
 
Equity Method Investment, Summarized Financial Information, Revenue
$ 55,586 
$ 48,509 
$ 113,642 
$ 103,123 
Equity Method Investment, Summarized Financial Information, Cost of Sales
2,803 
169 
3,053 
1,102 
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses
10,125 
8,876 
19,727 
16,296 
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense
10,084 
8,587 
19,047 
17,125 
Equity Method Investment, Summarized Financial Information, Net Income (Loss)
$ 32,575 
$ 30,870 
$ 71,822 
$ 68,593 
Equity Method Investments - Summarized financial information - NGL Energy (Details) (NGL Energy Partners LP [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
NGL Energy Partners LP [Member]
 
 
 
 
Summarized income statement information
 
 
 
 
Equity Method Investment, Summarized Financial Information, Revenue
$ 2,325,440 
$ 3,220,771 
$ 5,010,446 
$ 7,772,917 
Equity Method Investment, Summarized Financial Information, Cost of Sales
2,077,160 
2,933,021 
4,510,660 
7,244,689 
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses
399,373 
151,793 
509,145 
323,857 
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense
53,152 
54,140 
112,332 
104,475 
Equity Method Investment, Summarized Financial Information, Net Income (Loss)
$ (206,985)
$ 90,942 
$ (155,990)
$ 85,673 
Equity Method Investments - Summarized financial information - Glass Mountain (Details) (Glass Mountain Pipeline LLC [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Glass Mountain Pipeline LLC [Member]
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
Equity Method Investment, Summarized Financial Information, Revenue
$ 6,898 
$ 9,788 
$ 15,470 
$ 20,909 
Equity Method Investment, Summarized Financial Information, Cost of Sales
(120)
(40)
445 
1,974 
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses
1,618 
1,513 
3,463 
2,920 
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense
3,989 
3,932 
7,925 
7,976 
Equity Method Investment, Summarized Financial Information, Net Income (Loss)
$ 1,407 
$ 4,381 
$ 3,632 
$ 8,036 
Equity Method Investments (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Apr. 27, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
Gain (loss) on issuance of common units by equity method investee
$ 0 
$ 5,897,000 
$ (41,000)
$ 5,897,000 
 
 
General and administrative
20,775,000 
22,917,000 
41,835,000 
55,227,000 
 
 
Loss (gain) on sale or impairment of equity method investment
(9,120,000)
(6,623,000)
30,644,000 
(14,517,000)
 
 
Net proceeds from sale of common units of equity method investee
 
 
60,483,000 
56,318,000 
 
 
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
General and administrative
400,000 
400,000 
900,000 
700,000 
 
 
NGL Energy Partners LP [Member]
 
 
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
Gain (loss) on issuance of common units by equity method investee
0 
5,900,000 
0 
5,900,000 
 
 
Units of equity investee divested
 
 
 
1,999,533 
 
 
Closing price per common unit
 
 
 
 
$ 13.00 
$ 11.04 
Loss (gain) on sale or impairment of equity method investment
 
 
9,100,000 
 
 
 
Net proceeds from sale of common units of equity method investee
 
 
 
56,300,000 
 
 
Transaction related costs
 
 
 
500,000 
 
 
Gain on sale of common units of equity method investee
 
6,600,000 
 
14,500,000 
 
 
NGL Energy Partners LP [Member] |
General Partner [Member]
 
 
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
General partner ownership interest
 
 
11.78% 
 
 
 
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
Percentage of limited partner ownership interest
51.00% 
 
51.00% 
 
 
 
Glass Mountain Pipeline LLC [Member]
 
 
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
Project funding contributions
 
 
300,000 
 
 
 
Percentage of limited partner ownership interest
50.00% 
 
50.00% 
 
 
 
Pipeline expansion [Member] |
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
 
 
Schedule of Equity Method Investments [Line Items]
 
 
 
 
 
 
Project funding contributions
 
 
$ 2,200,000 
 
 
 
Incremental capacity expected to be added
 
 
65,000 
 
 
 
Impairment (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Apr. 27, 2016
Dec. 31, 2015
SemGas [Member]
 
 
 
Impairments [Line Items]
 
 
 
Goodwill, Impairment Loss
$ 13.1 
 
 
NGL Energy Partners LP [Member]
 
 
 
Impairments [Line Items]
 
 
 
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net
$ 39.8 
 
 
Share Price
 
$ 13.00 
$ 11.04 
Segments (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
$ 287,377 
$ 377,226 
$ 602,228 
$ 675,536 
 
Depreciation and amortization
25,048 
24,674 
49,095 
48,408 
 
Earnings from equity method investments
17,078 
23,903 
40,149 
44,462 
 
Total assets
3,096,974 
 
3,096,974 
 
2,853,909 
Income tax expense (benefit)
4,658 
14,861 
(16,749)
19,603 
 
Net unrealized loss (gain) related to derivative instruments
4,477 
(1,415)
(71)
1,230 
 
Interest expense
18,875 
16,822 
37,810 
31,413 
 
Foreign currency transaction loss (gain)
1,543 
(295)
3,012 
(814)
 
Loss (gain) on sale or impairment of equity method investment
(9,120)
(6,623)
30,644 
(14,517)
 
Other expense (income), net
(491)
(95)
(678)
(186)
 
Loss from discontinued operations, net of taxes
2 
2 
4 
2 
 
Net income
9,931 
28,433 
3,683 
34,209 
 
Equity method investments
446,938 
 
446,938 
 
551,078 
Crude Transportation [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
6,171 
9,038 
12,030 
17,656 
 
Earnings from equity method investments
17,078 
17,683 
37,917 
38,547 
 
Total assets
931,362 
 
931,362 
 
877,017 
Segment profit
18,161 1
19,983 1
43,579 1
44,507 1
 
Equity method investments
427,961 
 
427,961 
 
438,291 
SemCAMS [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
4,294 
3,187 
8,245 
6,253 
 
Total assets
376,586 
 
376,586 
 
331,749 
Income tax expense (benefit)
451 
616 
1,416 
1,167 
 
Segment profit
9,000 1
7,981 1
18,904 1
15,866 1
 
SemGas [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
9,194 
7,359 
18,116 
14,497 
 
Total assets
691,823 
 
691,823 
 
719,789 
Segment profit
12,304 1
17,671 1
11,312 1
32,551 1
 
SemLogistics [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
1,983 
2,154 
3,943 
4,194 
 
Total assets
143,648 
 
143,648 
 
155,794 
Income tax expense (benefit)
(273)
167 
(214)
(202)
 
Segment profit
2,002 1
1,992 1
4,661 1
2,853 1
 
SemMexico [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
949 
1,037 
1,890 
2,090 
 
Total assets
86,073 
 
86,073 
 
89,608 
Income tax expense (benefit)
194 
764 
801 
1,754 
 
Segment profit
2,024 1
5,056 1
4,342 1
10,179 1
 
Crude Facilities [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
1,921 
1,406 
3,805 
2,775 
 
Total assets
154,359 
 
154,359 
 
155,186 
Segment profit
9,371 1
7,963 1
18,958 1
16,365 1
 
Crude Supply and Logistics [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
40 
40 
80 
79 
 
Total assets
430,297 
 
430,297 
 
328,419 
Segment profit
10,069 1
10,978 1
19,162 1
16,159 1
 
Corporate, Non-Segment [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
496 
453 
986 
864 
 
Earnings from equity method investments
0 2
12,117 2
2,191 2
11,812 2
 
Total assets
282,826 3
 
282,826 3
 
196,347 3
Income tax expense (benefit)
4,286 
13,314 
(18,752)
16,884 
 
Segment profit
(8,008)3
4,740 3
(14,168)3
(19,132)3
 
Equity method investments
18,977 3
 
18,977 3
 
112,787 3
Operating Segments [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Depreciation and amortization
25,048 
24,674 
49,095 
48,408 
 
Earnings from equity method investments
17,078 
29,800 
40,108 
50,359 
 
Total assets
3,096,974 
 
3,096,974 
 
2,853,909 
Income tax expense (benefit)
4,658 
14,861 
(16,749)
19,603 
 
Segment profit
54,923 
76,364 
106,750 2
119,348 2
 
Operating Segments [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
287,377 
377,226 
602,228 
675,536 
 
Operating Segments [Member] |
Crude Transportation [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
15,643 
22,425 
32,839 
42,752 
 
Operating Segments [Member] |
SemCAMS [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
33,815 
35,915 
64,681 
65,639 
 
Operating Segments [Member] |
SemGas [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
48,200 
60,270 
91,720 
120,546 
 
Operating Segments [Member] |
SemLogistics [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
5,932 
6,279 
12,312 
11,431 
 
Operating Segments [Member] |
SemMexico [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
30,286 
51,459 
60,420 
112,949 
 
Operating Segments [Member] |
Crude Facilities [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
10,300 
11,402 
20,433 
22,807 
 
Operating Segments [Member] |
Crude Supply and Logistics [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
143,201 
189,476 
319,823 
292,437 
 
Operating Segments [Member] |
Corporate, Non-Segment [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
0 
0 
0 
6,975 
 
Intersegment Eliminations [Member] |
Crude Transportation [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
5,128 
3,562 
12,341 
7,283 
 
Intersegment Eliminations [Member] |
SemGas [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
2,521 
6,451 
5,267 
12,432 
 
Intersegment Eliminations [Member] |
Crude Facilities [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
2,526 
0 
5,272 
0 
 
Intersegment Eliminations [Member] |
Corporate, Non-Segment [Member]
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
Revenue
$ (10,175)
$ (10,013)
$ (22,880)
$ (19,715)
 
Inventories (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Inventory valuation adjustment
$ 0 
$ 1,235 
 
Components of Inventories
 
 
 
Crude oil
76,343 
 
59,121 
Asphalt and other
9,117 
 
11,118 
Total Inventories
85,460 
 
70,239 
Crude Supply and Logistics [Member] |
Crude Oil [Member]
 
 
 
Inventory valuation adjustment
 
$ 1,200 
 
Financial Instruments - Fair value of financial assets and liabilties (Details) (Commodity Derivatives [Member], Fair Value, Inputs, Level 1 [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Commodity Derivatives [Member] |
Fair Value, Inputs, Level 1 [Member]
 
 
Fair Value of Financial Assets and Liabilities
 
 
Derivative Asset, Fair Value, Gross Asset
$ 1,160 
$ 131 
Derivative Asset, Fair Value, Gross Liability
(1,160)1
(131)1
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
 
0 
Derivative Liability, Fair Value, Gross Liability
1,428 
470 
Derivative Liability, Fair Value, Gross Asset
(1,160)1
(131)1
Derivative Liability, Fair Value, Amount Not Offset Against Collateral
$ 268 
$ 339 
Financial Instruments - Level 2 and 3 (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Schedule of Changes in Fair Value of Financial Assets (Liabilities) Classified as Level 3
 
 
 
 
Level 2 and level 3 fair value transactions
$ 0 
$ 0 
$ 0 
$ 0 
Financial Instruments - Notional amounts (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2016
bbl
Jun. 30, 2015
bbl
Jun. 30, 2016
bbl
Jun. 30, 2015
bbl
Sales [Member]
 
 
 
 
Derivative [Line Items]
 
 
 
 
Derivative, Nonmonetary Notional Amount, Volume
5,890,000 
7,721,000 
16,310,000 
13,452,000 
Purchases [Member]
 
 
 
 
Derivative [Line Items]
 
 
 
 
Derivative, Nonmonetary Notional Amount, Volume
5,743,000 
7,508,000 
16,253,000 
13,413,000 
Financial Instruments - Fair value of commodity derivative assets and liabilities (Details) (Commodity Contract [Member], Not Designated as Hedging Instrument [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Other Current Assets [Member]
 
 
Derivatives, Fair Value [Line Items]
 
 
Derivative Asset
$ 0 
$ 0 
Other Current Liabilities [Member]
 
 
Derivatives, Fair Value [Line Items]
 
 
Derivative Liability
$ 268 
$ 339 
Financial Instruments - Realized and unrealized gains and losses (Details) (Commodity Contract [Member], Sales [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Commodity Contract [Member] |
Sales [Member]
 
 
 
 
Schedule of Realized and Unrealized Gains (Losses) from Commodity Derivatives
 
 
 
 
Realized and unrealized gains (losses) from commodity derivatives
$ (7,127)
$ (2,202)
$ (3,773)
$ (2,268)
Financial Instruments (Details Textual) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2016
Commodity Contract [Member]
Dec. 31, 2015
Commodity Contract [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Sales Revenue, Goods, Net [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Sales Revenue, Goods, Net [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Cost of Goods, Total [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Accounts Receivable [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Crude Supply and Logistics [Member]
Sales Revenue, Goods, Net [Member]
Customer
Jun. 30, 2016
Customer Concentration Risk [Member]
Crude Supply and Logistics [Member]
Sales Revenue, Goods, Net [Member]
Customer
Jun. 30, 2016
Customer Concentration Risk [Member]
Crude Supply and Logistics [Member]
Cost of Goods, Total [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Crude Supply and Logistics [Member]
Cost of Goods, Total [Member]
Jun. 30, 2016
Customer Concentration Risk [Member]
Crude Supply and Logistics [Member]
Accounts Receivable [Member]
Customer
Offsetting Assets [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
Margin Deposit Assets
$ 5,100,000 
$ 2,900,000 
 
 
 
 
 
 
 
 
 
 
 
Derivative Asset, Fair Value, Amount Offset Against Collateral
 
 
4,800,000 
2,600,000 
 
 
 
 
 
 
 
 
 
Number of Customers
 
 
 
 
 
 
 
 
1 
1 
 
 
2 
Concentration Risk, Percentage
 
 
 
 
30.00% 
33.00% 
11.00% 
42.00% 
 
 
 
 
 
Purchases of product
 
 
 
 
 
 
 
 
 
 
 
39,500,000 
 
Number of Suppliers
 
 
 
 
 
 
 
 
 
 
$ 0 
$ 1 
 
Income Taxes (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Income Taxes (Textual) [Abstract]
 
 
 
 
Effective Income Tax Rate Reconciliation, Percent
32.00% 
34.00% 
128.00% 
36.00% 
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
 
 
35.00% 
 
Long-Term Debt (Details) (USD $)
Jun. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]
 
 
Unamortized Debt Issuance Expense
 
$ (16,800,000)
Capital leases
64,000 
83,000 
Total long-term debt
1,070,388,000 
1,057,847,000 
less: current portion of long-term debt
25,000 
31,000 
Long-term debt, net
1,070,363,000 
1,057,816,000 
Corporate, Non-Segment [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt Instrument, Face Amount
300,000,000 
300,000,000 
Unamortized Debt Issuance Expense
(4,125,000)
(4,540,000)
Senior Notes
295,875,000 
295,460,000 
SemMexico [Member]
 
 
Debt Instrument [Line Items]
 
 
Borrowings
0 
0 
Revolving Credit Facility [Member] |
Corporate, Non-Segment [Member]
 
 
Debt Instrument [Line Items]
 
 
Borrowings
0 
30,000,000 
Rose Rock Midstream L P [Member]
 
 
Debt Instrument [Line Items]
 
 
Long-term debt, net
774,488,000 
732,356,000 
Rose Rock Midstream L P [Member] |
Rose Rock Notes due 2022 [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt Instrument, Face Amount
400,000,000 
400,000,000 
Unamortized Debt Issuance Expense
(6,442,000)
(6,975,000)
Senior Notes
393,558,000 
393,025,000 
Rose Rock Midstream L P [Member] |
Rose Rock Notes due 2023 [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt Instrument, Face Amount
350,000,000 
350,000,000 
Debt Instrument, Unamortized Discount
(5,178,000)
(5,455,000)
Unamortized Debt Issuance Expense
(4,931,000)
(5,266,000)
Senior Notes
339,891,000 
339,279,000 
Rose Rock Midstream L P [Member] |
Revolving Credit Facility [Member]
 
 
Debt Instrument [Line Items]
 
 
Borrowings
$ 41,000,000 
$ 0 
Long-Term Debt (Details Textual)
6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
Corporate, Non-Segment [Member]
USD ($)
Jun. 30, 2016
Corporate, Non-Segment [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2015
Corporate, Non-Segment [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Corporate, Non-Segment [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2015
Corporate, Non-Segment [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Corporate, Non-Segment [Member]
Letter of Credit [Member]
USD ($)
Jun. 30, 2016
Corporate, Non-Segment [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2015
Corporate, Non-Segment [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2016
Corporate, Non-Segment [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2015
Corporate, Non-Segment [Member]
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2015
Corporate, Non-Segment [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2016
SemMexico [Member]
USD ($)
Dec. 31, 2015
SemMexico [Member]
USD ($)
Jun. 30, 2016
SemMexico [Member]
Letter of Credit [Member]
USD ($)
Jun. 30, 2016
SemMexico [Member]
Letter of Credit [Member]
MXN ($)
Jun. 30, 2016
SemMexico [Member]
100 million MXP facility [Member]
USD ($)
Jun. 30, 2016
SemMexico [Member]
100 million MXP facility [Member]
MXN ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Bilateral Letter of Credit [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Letter of Credit [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2015
Rose Rock Midstream L P [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2015
Rose Rock Midstream L P [Member]
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2015
Rose Rock Midstream L P [Member]
Revolving Credit Facility [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Revolving Credit Facility [Member]
Alternate Base Rate Borrowings [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2022 [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2022 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2015
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2022 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2022 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2015
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2022 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
USD ($)
Dec. 31, 2015
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2015
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2015
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Mexican bank prime rate [Member]
SemMexico [Member]
100 million MXP facility [Member]
Jun. 30, 2016
Fair Value, Inputs, Level 2 [Member]
Corporate, Non-Segment [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Fair Value, Inputs, Level 2 [Member]
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2022 [Member]
Senior Notes [Member]
USD ($)
Jun. 30, 2016
Fair Value, Inputs, Level 2 [Member]
Rose Rock Midstream L P [Member]
Rose Rock Notes due 2023 [Member]
Senior Notes [Member]
USD ($)
Debt Instrument [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest Expense, Debt
 
 
 
$ 5,800,000 
$ 5,800,000 
$ 11,700,000 
$ 11,700,000 
 
$ 1,200,000 
$ 1,000,000 
$ 2,600,000 
$ 2,000,000 
 
 
 
 
 
 
 
 
 
$ 1,600,000 
$ 2,000,000 
$ 3,100,000 
$ 4,200,000 
 
 
 
$ 5,900,000 
$ 5,900,000 
$ 11,700,000 
$ 11,700,000 
 
 
$ 5,200,000 
$ 2,700,000 
$ 10,400,000 
$ 2,700,000 
 
 
 
 
Debt Instrument, Face Amount
 
 
300,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
400,000,000 
 
 
 
 
 
 
350,000,000 
 
350,000,000 
 
 
 
 
 
Debt Instrument, Interest Rate, Stated Percentage
 
 
 
7.50% 
 
7.50% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5.25% 
 
5.625% 
 
5.625% 
 
 
 
5.625% 
 
5.625% 
 
 
 
 
 
Debt Instrument, Unamortized Discount
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5,178,000 
5,455,000 
 
 
 
 
 
 
 
 
Maximum borrowing capacity
 
 
 
 
 
 
 
 
500,000,000 
 
500,000,000 
 
 
 
 
 
 
5,400,000 
100,000,000 
 
 
 
 
 
 
 
585,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Borrowings outstanding
 
 
 
 
 
 
 
 
0 
 
0 
 
30,000,000 
0 
0 
 
 
0 
 
 
 
41,000,000 
 
41,000,000 
 
0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Letters of credit outstanding
 
 
 
 
 
 
 
6,000,000 
 
 
 
 
 
 
 
15,800,000 
292,800,000 
 
 
18,900,000 
37,700,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate in effect
 
 
 
 
 
 
 
2.00% 
 
 
 
 
 
 
 
0.25% 
0.25% 
 
 
1.75% 
2.75% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt Instrument, Basis Spread on Variable Rate
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.50% 
 
 
 
Interest Costs Capitalized
1,600,000 
900,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-term Debt, Fair Value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 290,000,000 
$ 352,000,000 
$ 305,000,000 
Commitments and Contingencies - Purchase and sales commitments (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
bbl
Fixed Price Sales [Member]
 
Summary Of Purchase And Sale Commitments
 
Sale commitments, Volume (barrels)
4,563,000 
Sale commitments, Value
$ 218,212 
Floating Price Sales [Member]
 
Summary Of Purchase And Sale Commitments
 
Sale commitments, Volume (barrels)
17,773,000 
Sale commitments, Value
786,992 
Fixed Price Purchases [Member]
 
Summary Of Purchase And Sale Commitments
 
Purchase commitments, Volume (barrels)
3,528,000 
Purchase commitments, Value
167,030 
Floating Price Purchases [Member]
 
Summary Of Purchase And Sale Commitments
 
Purchase commitments, Volume (barrels)
12,701,000 
Purchase commitments, Value
$ 601,820 
Commitments and Contingencies Commitments and Contingencies - Take or Pay (Details) (Fractionation capacity [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Fractionation capacity [Member]
 
Long-term Purchase Commitment [Line Items]
 
Purchase Obligation, Remainder of the year
$ 5,951 
Purchase Obligation, Due in Second Year
11,938 
Purchase Obligation, Due in Third Year
10,060 
Purchase Obligation, Due in Fourth Year
9,121 
Purchase Obligation, Due in Fifth Year
8,451 
Purchase Obligation, Due after Fifth Year
15,940 
Purchase Obligation
$ 61,461 
Commitments and Contingencies (Details Textual) (USD $)
6 Months Ended 0 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Minimum [Member]
Jun. 30, 2016
Maximum [Member]
Oct. 1, 2015
Pipeline transportation capacity [Member]
Rose Rock Midstream L P [Member]
Jun. 30, 2016
Pipeline transportation capacity [Member]
Rose Rock Midstream L P [Member]
Oct. 1, 2015
Pipeline transportation capacity [Member]
Rose Rock Midstream L P [Member]
bbl
Jun. 30, 2016
Crude Transportation [Member]
Jun. 30, 2016
SemCAMS [Member]
Jun. 30, 2016
SemGas [Member]
Jun. 30, 2016
Proposed Department of Transportation penalty [Member]
Rose Rock Midstream L P [Member]
Commitments and Contingencies (Textual) [Abstract]
 
 
 
 
 
 
 
 
 
 
Accrued Liabilities
 
 
 
 
 
 
 
 
 
$ 600,200 
Sites in various stages of follow-up
4 
 
 
 
 
 
 
 
 
 
Sites with limited soil and ground water impact
2 
 
 
 
 
 
 
 
 
 
Sites requiring additional investigation
2 
 
 
 
 
 
 
 
 
 
Site contingency number of sites checked
6 
 
 
 
 
 
5 
 
1 
 
Asset retirement obligation liability
 
 
 
 
 
 
 
18,000,000 
 
 
Estimated cost to retire facilities
 
 
 
 
 
 
 
126,000,000 
 
 
Notice required to cancel purchase agreements, days
 
30 days 
120 days 
 
 
 
 
 
 
 
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required
 
 
 
 
 
5,000 
 
 
 
 
Term of unconditional purchase obligation
 
 
 
5 years 
 
 
 
 
 
 
Unrecorded unconditional purchase obligation, annual amount
 
 
 
 
$ 9,400,000 
 
 
 
 
 
Equity - Equity rollforward (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 3 Months Ended 6 Months Ended
Jun. 22, 2016
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
$ 1,196,356 
 
Net income (loss)
 
9,931 
28,433 
3,683 
34,209 
Other comprehensive income (loss), net of income taxes
 
6,591 
5,520 
2,482 
(3,540)
Stock Issued During Period, Value, New Issues
228,546 
 
 
228,546 
 
Distributions to noncontrolling interests
 
 
 
(21,485)
 
Dividends paid
 
 
 
(39,720)
 
Unvested dividend equivalent rights
 
 
 
272 
 
Non-cash equity compensation
 
 
 
5,323 
 
Issuance of common stock under compensation plans
 
 
 
775 
 
Repurchase of common stock
 
 
 
(904)
 
Balance at June 30, 2016
 
1,375,328 
 
1,375,328 
 
Common Stock [Member]
 
 
 
 
 
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
439 
 
Net income (loss)
 
 
 
0 
 
Other comprehensive income (loss), net of income taxes
 
 
 
0 
 
Stock Issued During Period, Value, New Issues
 
 
 
86 
 
Distributions to noncontrolling interests
 
 
 
0 
 
Dividends paid
 
 
 
0 
 
Unvested dividend equivalent rights
 
 
 
0 
 
Non-cash equity compensation
 
 
 
0 
 
Issuance of common stock under compensation plans
 
 
 
1 
 
Repurchase of common stock
 
 
 
0 
 
Balance at June 30, 2016
 
526 
 
526 
 
Additional Paid-In Capital [Member]
 
 
 
 
 
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
1,217,255 
 
Net income (loss)
 
 
 
0 
 
Other comprehensive income (loss), net of income taxes
 
 
 
0 
 
Stock Issued During Period, Value, New Issues
 
 
 
228,460 
 
Distributions to noncontrolling interests
 
 
 
0 
 
Dividends paid
 
 
 
(39,720)
 
Unvested dividend equivalent rights
 
 
 
206 
 
Non-cash equity compensation
 
 
 
4,592 
 
Issuance of common stock under compensation plans
 
 
 
774 
 
Repurchase of common stock
 
 
 
0 
 
Balance at June 30, 2016
 
1,411,567 
 
1,411,567 
 
Treasury Stock [Member]
 
 
 
 
 
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
(5,593)
 
Net income (loss)
 
 
 
0 
 
Other comprehensive income (loss), net of income taxes
 
 
 
0 
 
Stock Issued During Period, Value, New Issues
 
 
 
0 
 
Distributions to noncontrolling interests
 
 
 
0 
 
Dividends paid
 
 
 
0 
 
Unvested dividend equivalent rights
 
 
 
0 
 
Non-cash equity compensation
 
 
 
0 
 
Issuance of common stock under compensation plans
 
 
 
0 
 
Repurchase of common stock
 
 
 
(904)
 
Balance at June 30, 2016
 
(6,497)
 
(6,497)
 
Accumulated Deficit [Member]
 
 
 
 
 
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
(38,012)
 
Net income (loss)
 
 
 
(7,259)
 
Other comprehensive income (loss), net of income taxes
 
 
 
0 
 
Stock Issued During Period, Value, New Issues
 
 
 
0 
 
Distributions to noncontrolling interests
 
 
 
0 
 
Dividends paid
 
 
 
0 
 
Unvested dividend equivalent rights
 
 
 
0 
 
Non-cash equity compensation
 
 
 
0 
 
Issuance of common stock under compensation plans
 
 
 
0 
 
Repurchase of common stock
 
 
 
0 
 
Balance at June 30, 2016
 
(45,271)
 
(45,271)
 
Accumulated Other Comprehensive Income (Loss) [Member]
 
 
 
 
 
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
(58,562)
 
Net income (loss)
 
 
 
0 
 
Other comprehensive income (loss), net of income taxes
 
 
 
2,482 
 
Stock Issued During Period, Value, New Issues
 
 
 
0 
 
Distributions to noncontrolling interests
 
 
 
0 
 
Dividends paid
 
 
 
0 
 
Unvested dividend equivalent rights
 
 
 
0 
 
Non-cash equity compensation
 
 
 
0 
 
Issuance of common stock under compensation plans
 
 
 
0 
 
Repurchase of common stock
 
 
 
0 
 
Balance at June 30, 2016
 
(56,080)
 
(56,080)
 
Noncontrolling Interest [Member]
 
 
 
 
 
SemGroup owners’ equity:
 
 
 
 
 
Balance at December 31, 2015
 
 
 
80,829 
 
Net income (loss)
 
 
 
10,942 
 
Other comprehensive income (loss), net of income taxes
 
 
 
0 
 
Stock Issued During Period, Value, New Issues
 
 
 
0 
 
Distributions to noncontrolling interests
 
 
 
(21,485)
 
Unvested dividend equivalent rights
 
 
 
66 
 
Non-cash equity compensation
 
 
 
731 
 
Issuance of common stock under compensation plans
 
 
 
0 
 
Repurchase of common stock
 
 
 
0 
 
Balance at June 30, 2016
 
$ 71,083 
 
$ 71,083 
 
Equity - Accumulated other comprehensive income (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Components of Accumulated Other Comprehensive Loss
 
Balance at December 31, 2015
$ (58,562)
Currency translation adjustment, net of income tax expense of $1,589
2,608 
Changes related to benefit plans, net of income tax benefit of $42
(126)
Balance at June 30, 2016
(56,080)
Currency Translation [Member]
 
Components of Accumulated Other Comprehensive Loss
 
Balance at December 31, 2015
(57,201)
Currency translation adjustment, net of income tax expense of $1,589
2,608 
Changes related to benefit plans, net of income tax benefit of $42
0 
Balance at June 30, 2016
(54,593)
Employee Benefit Plans [Member]
 
Components of Accumulated Other Comprehensive Loss
 
Balance at December 31, 2015
(1,361)
Currency translation adjustment, net of income tax expense of $1,589
0 
Changes related to benefit plans, net of income tax benefit of $42
(126)
Balance at June 30, 2016
$ (1,487)
Equity - Dividends (Details)
0 Months Ended 6 Months Ended 0 Months Ended
May 26, 2016
Mar. 17, 2016
Nov. 24, 2015
Aug. 25, 2015
May 27, 2015
Mar. 20, 2015
Jun. 30, 2016
First quarter 2015 dividend [Member]
Jun. 30, 2016
Second quarter 2015 dividend [Member]
Jun. 30, 2016
Third quarter 2015 dividend [Member] [Member]
Jun. 30, 2016
Fourth quarter 2015 dividend [Member]
Jun. 30, 2016
first quarter 2016 dividend [Member]
Jun. 30, 2016
Second quarter dividend 2016 [Member]
Jun. 30, 2016
Third quarter dividend 2016 [Member]
Aug. 25, 2016
Subsequent Event [Member]
Dividends Payable [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividend Per Share, Paid
$ 0.45 
$ 0.45 
$ 0.45 
$ 0.42 
$ 0.38 
$ 0.34 
 
 
 
 
 
 
 
 
Date of Record
 
 
 
 
 
 
Mar. 09, 2015 
May 18, 2015 
Aug. 17, 2015 
Nov. 16, 2015 
Mar. 07, 2016 
May 16, 2016 
Aug. 15, 2016 
 
Date Paid
May 26, 2016 
Mar. 17, 2016 
Nov. 24, 2015 
Aug. 25, 2015 
May 29, 2015 
Mar. 20, 2015 
 
 
 
 
 
 
 
Aug. 25, 2016 
Common Stock, Dividends, Per Share, Declared
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 0.45 
Equity (Details Textual) (USD $)
0 Months Ended 6 Months Ended
Jun. 22, 2016
Jun. 30, 2016
Jun. 22, 2016
Equity [Line Items]
 
 
 
Stock Issued During Period, Shares, New Issues
8,625,000 
 
 
Shares Issued, Price Per Share
 
 
$ 27.00 
Stock Issued During Period, Value, New Issues
$ 228,546,000 
$ 228,546,000 
 
Payments of Stock Issuance Costs
 
4,300,000 
 
EQUITY (Textual) [Abstract]
 
 
 
Employee Stock Purchase Plan shares issued during period
 
30,718 
 
Outstanding unvested equity compensation awards
 
797,812 
 
Additional equity compensation awards that could vest if certain targets are achieved
 
408,000 
 
Equity compensation awards granted during the period
 
548,143 
 
Weighted average grant date fair value of equity awards granted during the period
 
$ 19.20 
 
Income tax expense, related to change in benefit plans
 
(42,000)
 
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax
 
1,589,000 
 
Stock Compensation Plan [Member]
 
 
 
EQUITY (Textual) [Abstract]
 
 
 
Vested common stock
 
157,077 
 
Cash settled UUD [Member]
 
 
 
EQUITY (Textual) [Abstract]
 
 
 
Unvested Dividend Equivalent Value
 
$ 390,000 
 
Earnings Per Share - Basic (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Basic earnings per share
 
 
 
 
Income (loss)
$ 9,933 
$ 28,435 
$ 3,687 
$ 34,211 
Loss from discontinued operations, net of income taxes
(2)
(2)
(4)
(2)
Net income
9,931 
28,433 
3,683 
34,209 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Numerator
8,009 
23,297 
(7,259)
24,763 
Weighted average common stock outstanding
45,236 
43,798 
44,553 
43,758 
Basic earnings (loss) per share, Net
$ 0.18 
$ 0.53 
$ (0.16)
$ 0.57 
Continuing Operations [Member]
 
 
 
 
Basic earnings per share
 
 
 
 
Income (loss)
9,933 
28,435 
3,687 
34,211 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Numerator
8,011 
23,299 
(7,255)
24,765 
Weighted average common stock outstanding
45,236 
43,798 
44,553 
43,758 
Basic earnings per share, Continuing Operations
$ 0.18 
$ 0.53 
$ (0.16)
$ 0.57 
Discontinued Operations [Member]
 
 
 
 
Basic earnings per share
 
 
 
 
Loss from discontinued operations, net of income taxes
(2)
(2)
(4)
(2)
Less: net income attributable to noncontrolling interests
0 
0 
0 
0 
Numerator
$ (2)
$ (2)
$ (4)
$ (2)
Weighted average common stock outstanding
45,236 
43,798 
44,553 
43,758 
Basic earnings per share, Discontinued Operations
$ 0.00 
$ 0.00 
$ 0.00 
$ 0.00 
Earnings Per Share - Diluted (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Diluted earnings per share
 
 
 
 
Income (loss)
$ 9,933 
$ 28,435 
$ 3,687 
$ 34,211 
Loss from discontinued operations, net of income taxes
(2)
(2)
(4)
(2)
Net income
9,931 
28,433 
3,683 
34,209 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Numerator
8,009 
23,297 
(7,259)
24,763 
Weighted average common stock outstanding
45,236 
43,798 
44,553 
43,758 
Effect of dilutive securities
411 
215 
0 
217 
Denominator, Net, Diluted
45,647 
44,013 
44,553 
43,975 
Diluted earnings (loss) per share, Net
$ 0.18 
$ 0.53 
$ (0.16)
$ 0.56 
Continuing Operations [Member]
 
 
 
 
Diluted earnings per share
 
 
 
 
Income (loss)
9,933 
28,435 
3,687 
34,211 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Numerator
8,011 
23,299 
(7,255)
24,765 
Weighted average common stock outstanding
45,236 
43,798 
44,553 
43,758 
Effect of dilutive securities
411 
215 
0 
217 
Denominator, Net, Diluted
45,647 
44,013 
44,553 
43,975 
Diluted earnings per share, Continuing Operations
$ 0.18 
$ 0.53 
$ (0.16)
$ 0.56 
Discontinued Operations [Member]
 
 
 
 
Diluted earnings per share
 
 
 
 
Loss from discontinued operations, net of income taxes
(2)
(2)
(4)
(2)
Less: net income attributable to noncontrolling interests
0 
0 
0 
0 
Numerator
$ (2)
$ (2)
$ (4)
$ (2)
Weighted average common stock outstanding
45,236 
43,798 
44,553 
43,758 
Effect of dilutive securities
411 
215 
0 
217 
Denominator, Net, Diluted
45,647 
44,013 
44,553 
43,975 
Diluted earnings per share, Discontinued Operations
$ 0.00 
$ 0.00 
$ 0.00 
$ 0.00 
Supplemental Cash Flow Information - Operating assets and liabilities (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Components of operating assets and liabilities
 
 
Decrease (increase) in restricted cash
$ 1 
$ 6,766 
Decrease (increase) in accounts receivable
(60,062)
(2,248)
Decrease (increase) in receivable from affiliates
(4,305)
(1,353)
Decrease (increase) in inventories
(15,918)
(36,065)
Decrease (increase) in derivatives and margin deposits
(2,163)
(287)
Decrease (increase) in other current assets
956 
(3,134)
Decrease (increase) in other assets
(1,266)
(2,096)
Increase (decrease) in accounts payable and accrued liabilities
60,867 
18,730 
Increase (decrease) in payable to affiliates
3,997 
5,580 
Increase (decrease) in payables to pre-petition creditors
0 
(3,836)
Increase (decrease) in other noncurrent liabilities
(1,453)
47 
Total changes in operating assets and liabilities
$ (19,346)
$ (17,896)
Supplemental Cash Flow Information (Details Textual) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Interest Paid
$ 34.9 
$ 28.2 
Income Taxes Paid, Net
2.3 
5.7 
Capital Expenditures Incurred but Not yet Paid
9.1 
16.8 
Insurance prepayment financed [Member]
 
 
Liabilities Assumed
$ 4.0 
$ 4.6 
Related Party Transactions - Transactions with NGL Energy (Details) (NGL Energy [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
NGL Energy [Member]
 
 
 
 
Related Party Transaction
 
 
 
 
Revenues
$ 8,303 
$ 74,447 
$ 16,832 
$ 119,916 
Related Party Transaction, Purchases from Related Party
6,366 
75,027 
13,196 
110,261 
Related Party Transaction Reimbursements from Transactions With Related Party
$ 0 
$ 14 
$ 0 
$ 56 
Related Party Transactions (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Glass Mountain Pipeline LLC [Member]
 
 
 
 
Related Party Transactions (Textual) [Abstract]
 
 
 
 
Related Party Transaction, Expenses from Transactions with Related Party
$ 1,400,000 
$ 700,000 
$ 3,300,000 
$ 1,200,000 
Related Party Transaction Reimbursements from Transactions With Related Party
200,000 
200,000 
400,000 
400,000 
Related Party Transaction, Purchases from Related Party
0 
0 
400,000 
1,500,000 
White Cliffs Pipeline, L.L.C. [Member]
 
 
 
 
Related Party Transactions (Textual) [Abstract]
 
 
 
 
Revenues
1,100,000 
1,100,000 
2,200,000 
2,100,000 
Related Party Transaction, Expenses from Transactions with Related Party
2,700,000 
1,100,000 
5,200,000 
1,800,000 
Related Party Transaction Reimbursements from Transactions With Related Party
100,000 
100,000 
200,000 
200,000 
Related Party Transaction, Purchases from Related Party
3,500,000 
0 
3,500,000 
0 
Law Firm [Member]
 
 
 
 
Related Party Transactions (Textual) [Abstract]
 
 
 
 
Legal fees
300,000 
400,000 
400,000 
700,000 
White Cliffs Pipeline L L C [Member] |
Law Firm [Member]
 
 
 
 
Related Party Transactions (Textual) [Abstract]
 
 
 
 
Legal fees
$ 100 
$ 100 
$ 1,600 
$ 3,400 
Condensed Consolidating Guarantor Financial Statements - Balance Sheets (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Condensed Balance Sheet Statements, Captions [Line Items]
 
 
 
 
Other Liabilities, Current
$ 11,510 
$ 13,281 
 
 
Current assets:
 
 
 
 
Cash and cash equivalents
255,780 
58,096 
228,783 
40,598 
Restricted cash
31 
32 
 
 
Accounts receivable, net
388,668 
326,713 
 
 
Receivable from affiliates
10,219 
5,914 
 
 
Inventories
85,460 
70,239 
 
 
Other current assets
25,445 
19,387 
 
 
Total current assets
765,603 
480,381 
 
 
Property, plant and equipment, net
1,648,962 
1,566,821 
 
 
Equity method investments
446,938 
551,078 
 
 
Goodwill
34,698 
48,032 
 
 
Other intangible assets, net
156,617 
162,223 
 
 
Other noncurrent assets
44,156 
45,374 
 
 
Total assets
3,096,974 
2,853,909 
 
 
Current liabilities:
 
 
 
 
Accounts Payable
338,720 
273,666 
 
 
Due to Related Parties
9,030 
5,033 
 
 
Accrued Liabilities
84,703 
85,047 
 
 
Total current liabilities
443,963 
377,027 
 
 
Long-term debt, net
1,070,363 
1,057,816 
 
 
Deferred income taxes
183,776 
200,953 
 
 
Other noncurrent liabilities
23,544 
21,757 
 
 
Commitments and contingencies
   
   
 
 
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
1,304,245 
1,115,527 
 
 
Noncontrolling interests in consolidated subsidiaries
71,083 
80,829 
 
 
Total owners’ equity
1,375,328 
1,196,356 
 
 
Total liabilities and owners’ equity
3,096,974 
2,853,909 
 
 
Parent Company [Member]
 
 
 
 
Condensed Balance Sheet Statements, Captions [Line Items]
 
 
 
 
Other Liabilities, Current
364 
569 
 
 
Current assets:
 
 
 
 
Cash and cash equivalents
187,987 
4,559 
118,060 
9,254 
Restricted cash
0 
0 
 
 
Accounts receivable, net
641 
640 
 
 
Receivable from affiliates
4,897 
1,616 
 
 
Inventories
0 
0 
 
 
Other current assets
9,228 
8,477 
 
 
Total current assets
202,753 
15,292 
 
 
Property, plant and equipment, net
4,915 
4,335 
 
 
Equity method investments
1,502,156 
1,546,853 
 
 
Goodwill
0 
0 
 
 
Other intangible assets, net
18 
20 
 
 
Other noncurrent assets
38,780 
39,358 
 
 
Total assets
1,748,622 
1,605,858 
 
 
Current liabilities:
 
 
 
 
Accounts Payable
533 
734 
 
 
Due to Related Parties
53 
78 
 
 
Accrued Liabilities
9,392 
5,551 
 
 
Total current liabilities
10,342 
6,932 
 
 
Long-term debt, net
295,875 
325,460 
 
 
Deferred income taxes
135,985 
155,411 
 
 
Other noncurrent liabilities
2,175 
2,528 
 
 
Commitments and contingencies
   
   
 
 
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
1,304,245 
1,115,527 
 
 
Noncontrolling interests in consolidated subsidiaries
0 
0 
 
 
Total owners’ equity
1,304,245 
1,115,527 
 
 
Total liabilities and owners’ equity
1,748,622 
1,605,858 
 
 
Guarantor Subsidiaries [Member]
 
 
 
 
Condensed Balance Sheet Statements, Captions [Line Items]
 
 
 
 
Other Liabilities, Current
0 
0 
 
 
Current assets:
 
 
 
 
Cash and cash equivalents
0 
0 
0 
0 
Restricted cash
0 
0 
 
 
Accounts receivable, net
12,596 
20,015 
 
 
Receivable from affiliates
802 
1,119 
 
 
Inventories
(120)
(48)
 
 
Other current assets
742 
359 
 
 
Total current assets
14,020 
21,445 
 
 
Property, plant and equipment, net
532,702 
536,628 
 
 
Equity method investments
510,115 
426,801 
 
 
Goodwill
0 
13,052 
 
 
Other intangible assets, net
140,083 
144,183 
 
 
Other noncurrent assets
778 
881 
 
 
Total assets
1,197,698 
1,142,990 
 
 
Current liabilities:
 
 
 
 
Accounts Payable
11,346 
11,221 
 
 
Due to Related Parties
21 
155 
 
 
Accrued Liabilities
11,511 
10,957 
 
 
Total current liabilities
22,878 
22,333 
 
 
Long-term debt, net
6,640 
7,340 
 
 
Deferred income taxes
0 
0 
 
 
Other noncurrent liabilities
0 
0 
 
 
Commitments and contingencies
   
   
 
 
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
1,168,180 
1,113,317 
 
 
Noncontrolling interests in consolidated subsidiaries
0 
0 
 
 
Total owners’ equity
1,168,180 
1,113,317 
 
 
Total liabilities and owners’ equity
1,197,698 
1,142,990 
 
 
Non-Guarantor Subsidiaries [Member]
 
 
 
 
Condensed Balance Sheet Statements, Captions [Line Items]
 
 
 
 
Other Liabilities, Current
11,146 
12,712 
 
 
Current assets:
 
 
 
 
Cash and cash equivalents
68,614 
55,101 
112,980 
35,445 
Restricted cash
31 
32 
 
 
Accounts receivable, net
375,431 
306,058 
 
 
Receivable from affiliates
9,467 
6,141 
 
 
Inventories
85,580 
70,287 
 
 
Other current assets
15,475 
10,551 
 
 
Total current assets
554,598 
448,170 
 
 
Property, plant and equipment, net
1,111,345 
1,025,858 
 
 
Equity method investments
427,961 
438,291 
 
 
Goodwill
34,698 
34,980 
 
 
Other intangible assets, net
16,516 
18,020 
 
 
Other noncurrent assets
4,598 
5,135 
 
 
Total assets
2,149,716 
1,970,454 
 
 
Current liabilities:
 
 
 
 
Accounts Payable
326,841 
261,711 
 
 
Due to Related Parties
13,903 
7,762 
 
 
Accrued Liabilities
63,796 
68,534 
 
 
Total current liabilities
415,686 
350,719 
 
 
Long-term debt, net
790,988 
748,856 
 
 
Deferred income taxes
47,791 
45,542 
 
 
Other noncurrent liabilities
21,369 
19,229 
 
 
Commitments and contingencies
   
   
 
 
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
802,799 
725,279 
 
 
Noncontrolling interests in consolidated subsidiaries
71,083 
80,829 
 
 
Total owners’ equity
873,882 
806,108 
 
 
Total liabilities and owners’ equity
2,149,716 
1,970,454 
 
 
Consolidating Adjustments [Member]
 
 
 
 
Condensed Balance Sheet Statements, Captions [Line Items]
 
 
 
 
Other Liabilities, Current
0 
0 
 
 
Current assets:
 
 
 
 
Cash and cash equivalents
(821)
(1,564)
(2,257)
(4,101)
Restricted cash
0 
0 
 
 
Accounts receivable, net
0 
0 
 
 
Receivable from affiliates
(4,947)
(2,962)
 
 
Inventories
0 
0 
 
 
Other current assets
0 
0 
 
 
Total current assets
(5,768)
(4,526)
 
 
Property, plant and equipment, net
0 
0 
 
 
Equity method investments
(1,993,294)
(1,860,867)
 
 
Goodwill
0 
0 
 
 
Other intangible assets, net
0 
0 
 
 
Other noncurrent assets
0 
0 
 
 
Total assets
(1,999,062)
(1,865,393)
 
 
Current liabilities:
 
 
 
 
Accounts Payable
0 
0 
 
 
Due to Related Parties
(4,947)
(2,962)
 
 
Accrued Liabilities
4 
5 
 
 
Total current liabilities
(4,943)
(2,957)
 
 
Long-term debt, net
(23,140)
(23,840)
 
 
Deferred income taxes
0 
0 
 
 
Other noncurrent liabilities
0 
0 
 
 
Commitments and contingencies
   
   
 
 
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries
(1,970,979)
(1,838,596)
 
 
Noncontrolling interests in consolidated subsidiaries
0 
0 
 
 
Total owners’ equity
(1,970,979)
(1,838,596)
 
 
Total liabilities and owners’ equity
$ (1,999,062)
$ (1,865,393)
 
 
Condensed Consolidating Guarantor Financial Statements - Statements of Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]
 
 
 
 
Other Nonoperating Income (Expense)
$ 491 
$ 95 
$ 678 
$ 186 
Revenues:
 
 
 
 
Product
210,126 
288,736 
447,022 
508,867 
Service
62,200 
66,604 
126,273 
128,481 
Other
15,051 
21,886 
28,933 
38,188 
Revenue
287,377 
377,226 
602,228 
675,536 
Expenses:
 
 
 
 
Cost of products sold
176,842 
244,158 
373,789 
436,230 
Operating
54,707 
60,800 
104,899 
113,890 
General and administrative
20,775 
22,917 
41,835 
55,227 
Depreciation and amortization
25,048 
24,674 
49,095 
48,408 
Loss on disposal or impairment of long-lived assets, net
(1,685)
(1,372)
 
(2,430)
Loss (gain) on disposal or impairment, net
(1,685)
(1,372)
(14,992)
(2,430)
Total expenses
279,057 
353,921 
584,610 
656,185 
Earnings from equity method investments
17,078 
23,903 
40,149 
44,462 
Gain (loss) on issuance of common units by equity method investee
0 
5,897 
(41)
5,897 
Operating income
25,398 
53,105 
57,726 
69,710 
Other expenses (income), net:
 
 
 
 
Interest expense
18,875 
16,822 
37,810 
31,413 
Foreign currency transaction loss (gain)
1,543 
(295)
3,012 
(814)
Total other expenses, net
10,807 
9,809 
70,788 
15,896 
Loss (gain) on sale or impairment of equity method investment
(9,120)
(6,623)
30,644 
(14,517)
Income (loss) from continuing operations before income taxes
14,591 
43,296 
(13,062)
53,814 
Income tax expense (benefit)
4,658 
14,861 
(16,749)
19,603 
Income (loss) from continuing operations
9,933 
28,435 
3,687 
34,211 
Loss from discontinued operations, net of income taxes
(2)
(2)
(4)
(2)
Net income
9,931 
28,433 
3,683 
34,209 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Net income (loss) attributable to SemGroup
8,009 
23,297 
(7,259)
24,763 
Other comprehensive income (loss), net of income taxes
6,591 
5,520 
2,482 
(3,540)
Comprehensive income (loss)
16,522 
33,953 
6,165 
30,669 
Less: comprehensive income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Comprehensive income (loss) attributable to SemGroup
14,600 
28,817 
(4,777)
21,223 
Parent Company [Member]
 
 
 
 
Condensed Income Statements, Captions [Line Items]
 
 
 
 
Other Nonoperating Income (Expense)
249 
778 
487 
1,570 
Revenues:
 
 
 
 
Product
0 
0 
0 
0 
Service
0 
0 
0 
0 
Other
0 
0 
0 
0 
Revenue
0 
0 
0 
0 
Expenses:
 
 
 
 
Cost of products sold
0 
0 
0 
0 
Operating
0 
0 
0 
0 
General and administrative
4,782 
4,626 
10,654 
22,228 
Depreciation and amortization
393 
329 
773 
623 
Loss on disposal or impairment of long-lived assets, net
0 
0 
 
0 
Loss (gain) on disposal or impairment, net
 
 
0 
 
Total expenses
5,175 
4,955 
11,427 
22,851 
Earnings from equity method investments
6,557 
28,583 
13,147 
43,388 
Gain (loss) on issuance of common units by equity method investee
 
5,897 
(41)
5,897 
Operating income
1,382 
29,525 
1,679 
26,434 
Other expenses (income), net:
 
 
 
 
Interest expense
(936)
781 
(1,513)
2,203 
Foreign currency transaction loss (gain)
0 
(5)
0 
(5)
Total other expenses, net
(10,305)
(6,625)
28,644 
(13,889)
Loss (gain) on sale or impairment of equity method investment
(9,120)
(6,623)
30,644 
(14,517)
Income (loss) from continuing operations before income taxes
11,687 
36,150 
(26,965)
40,323 
Income tax expense (benefit)
3,679 
12,853 
(19,706)
15,560 
Income (loss) from continuing operations
8,008 
23,297 
(7,259)
24,763 
Loss from discontinued operations, net of income taxes
0 
0 
0 
0 
Net income
8,008 
23,297 
(7,259)
24,763 
Less: net income attributable to noncontrolling interests
0 
0 
0 
0 
Net income (loss) attributable to SemGroup
8,008 
23,297 
(7,259)
24,763 
Other comprehensive income (loss), net of income taxes
18,480 
(2,346)
(1,986)
6,300 
Comprehensive income (loss)
26,488 
20,951 
(9,245)
31,063 
Less: comprehensive income attributable to noncontrolling interests
0 
0 
0 
0 
Comprehensive income (loss) attributable to SemGroup
26,488 
20,951 
(9,245)
31,063 
Guarantor Subsidiaries [Member]
 
 
 
 
Condensed Income Statements, Captions [Line Items]
 
 
 
 
Other Nonoperating Income (Expense)
0 
0 
0 
0 
Revenues:
 
 
 
 
Product
39,849 
50,293 
73,247 
101,346 
Service
10,872 
15,743 
23,740 
30,202 
Other
0 
0 
0 
0 
Revenue
50,721 
66,036 
96,987 
131,548 
Expenses:
 
 
 
 
Cost of products sold
27,171 
35,632 
51,780 
76,300 
Operating
9,192 
8,822 
16,885 
16,936 
General and administrative
2,379 
2,642 
4,625 
4,706 
Depreciation and amortization
9,146 
7,255 
18,020 
14,288 
Loss on disposal or impairment of long-lived assets, net
1 
(108)
 
(107)
Loss (gain) on disposal or impairment, net
 
 
(13,051)
 
Total expenses
47,887 
54,459 
104,361 
112,337 
Earnings from equity method investments
9,034 
15,048 
28,214 
27,576 
Gain (loss) on issuance of common units by equity method investee
 
0 
0 
0 
Operating income
11,868 
26,625 
20,840 
46,787 
Other expenses (income), net:
 
 
 
 
Interest expense
8,333 
6,160 
16,336 
11,651 
Foreign currency transaction loss (gain)
0 
0 
0 
0 
Total other expenses, net
8,333 
6,160 
16,336 
11,651 
Loss (gain) on sale or impairment of equity method investment
0 
0 
0 
0 
Income (loss) from continuing operations before income taxes
3,535 
20,465 
4,504 
35,136 
Income tax expense (benefit)
0 
0 
0 
0 
Income (loss) from continuing operations
3,535 
20,465 
4,504 
35,136 
Loss from discontinued operations, net of income taxes
(1)
(1)
(3)
(1)
Net income
3,534 
20,464 
4,501 
35,135 
Less: net income attributable to noncontrolling interests
0 
0 
0 
0 
Net income (loss) attributable to SemGroup
3,534 
20,464 
4,501 
35,135 
Other comprehensive income (loss), net of income taxes
485 
0 
701 
0 
Comprehensive income (loss)
4,019 
20,464 
5,202 
35,135 
Less: comprehensive income attributable to noncontrolling interests
0 
0 
0 
0 
Comprehensive income (loss) attributable to SemGroup
4,019 
20,464 
5,202 
35,135 
Non-Guarantor Subsidiaries [Member]
 
 
 
 
Condensed Income Statements, Captions [Line Items]
 
 
 
 
Other Nonoperating Income (Expense)
478 
50 
664 
115 
Revenues:
 
 
 
 
Product
172,798 
244,886 
379,042 
419,938 
Service
51,328 
50,861 
102,533 
98,279 
Other
15,051 
21,886 
28,933 
38,188 
Revenue
239,177 
317,633 
510,508 
556,405 
Expenses:
 
 
 
 
Cost of products sold
152,192 
214,969 
327,276 
372,347 
Operating
45,515 
51,978 
88,014 
96,954 
General and administrative
13,614 
15,649 
26,556 
28,293 
Depreciation and amortization
15,509 
17,090 
30,302 
33,497 
Loss on disposal or impairment of long-lived assets, net
(1,686)
(1,264)
 
(2,323)
Loss (gain) on disposal or impairment, net
 
 
(1,941)
 
Total expenses
228,516 
300,950 
474,089 
533,414 
Earnings from equity method investments
17,077 
17,683 
37,917 
38,547 
Gain (loss) on issuance of common units by equity method investee
 
0 
0 
0 
Operating income
27,738 
34,366 
74,336 
61,538 
Other expenses (income), net:
 
 
 
 
Interest expense
11,714 
10,614 
23,460 
19,058 
Foreign currency transaction loss (gain)
1,543 
(290)
3,012 
(809)
Total other expenses, net
12,779 
10,274 
25,808 
18,134 
Loss (gain) on sale or impairment of equity method investment
0 
0 
0 
0 
Income (loss) from continuing operations before income taxes
14,959 
24,092 
48,528 
43,404 
Income tax expense (benefit)
979 
2,008 
2,957 
4,043 
Income (loss) from continuing operations
13,980 
22,084 
45,571 
39,361 
Loss from discontinued operations, net of income taxes
(1)
(1)
(1)
(1)
Net income
13,979 
22,083 
45,570 
39,360 
Less: net income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Net income (loss) attributable to SemGroup
12,057 
16,947 
34,628 
29,914 
Other comprehensive income (loss), net of income taxes
(12,374)
7,866 
3,767 
(9,840)
Comprehensive income (loss)
1,605 
29,949 
49,337 
29,520 
Less: comprehensive income attributable to noncontrolling interests
1,922 
5,136 
10,942 
9,446 
Comprehensive income (loss) attributable to SemGroup
(317)
24,813 
38,395 
20,074 
Consolidating Adjustments [Member]
 
 
 
 
Condensed Income Statements, Captions [Line Items]
 
 
 
 
Other Nonoperating Income (Expense)
(236)
(733)
(473)
(1,499)
Revenues:
 
 
 
 
Product
(2,521)
(6,443)
(5,267)
(12,417)
Service
0 
0 
0 
0 
Other
0 
0 
0 
0 
Revenue
(2,521)
(6,443)
(5,267)
(12,417)
Expenses:
 
 
 
 
Cost of products sold
(2,521)
(6,443)
(5,267)
(12,417)
Operating
0 
0 
0 
0 
General and administrative
0 
0 
0 
0 
Depreciation and amortization
0 
0 
0 
0 
Loss on disposal or impairment of long-lived assets, net
0 
0 
 
0 
Loss (gain) on disposal or impairment, net
 
 
0 
 
Total expenses
(2,521)
(6,443)
(5,267)
(12,417)
Earnings from equity method investments
(15,590)
(37,411)
(39,129)
(65,049)
Gain (loss) on issuance of common units by equity method investee
 
0 
0 
0 
Operating income
(15,590)
(37,411)
(39,129)
(65,049)
Other expenses (income), net:
 
 
 
 
Interest expense
(236)
(733)
(473)
(1,499)
Foreign currency transaction loss (gain)
0 
0 
0 
0 
Total other expenses, net
0 
0 
0 
0 
Loss (gain) on sale or impairment of equity method investment
0 
0 
0 
0 
Income (loss) from continuing operations before income taxes
(15,590)
(37,411)
(39,129)
(65,049)
Income tax expense (benefit)
0 
0 
0 
0 
Income (loss) from continuing operations
(15,590)
(37,411)
(39,129)
(65,049)
Loss from discontinued operations, net of income taxes
0 
0 
0 
0 
Net income
(15,590)
(37,411)
(39,129)
(65,049)
Less: net income attributable to noncontrolling interests
0 
0 
0 
0 
Net income (loss) attributable to SemGroup
(15,590)
(37,411)
(39,129)
(65,049)
Other comprehensive income (loss), net of income taxes
0 
0 
0 
0 
Comprehensive income (loss)
(15,590)
(37,411)
(39,129)
(65,049)
Less: comprehensive income attributable to noncontrolling interests
0 
0 
0 
0 
Comprehensive income (loss) attributable to SemGroup
$ (15,590)
$ (37,411)
$ (39,129)
$ (65,049)
Condensed Consolidating Guarantor Financial Statements - Cash Flow Statements (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]
 
 
Net cash provided by operating activities
$ 73,915 
$ 72,957 
Cash flows from investing activities:
 
 
Capital expenditures
(126,712)
(236,956)
Proceeds from sale of long-lived assets
114 
230 
Contributions to equity method investments
(3,448)
(23,461)
Proceeds from sale of common units of equity method investee
60,483 
56,318 
Proceeds from the sale of assets to Rose Rock Midstream L.P.
 
0 
Distributions in excess of equity in earnings of affiliates
13,778 
13,077 
Net cash used in investing activities
(55,785)
(190,792)
Cash flows from financing activities:
 
 
Debt issuance costs
0 
(6,289)
Borrowings on credit facilities and issuance of senior secured notes, net of discount
283,500 
802,208 
Principal payments on credit facilities and other obligations
(272,881)
(525,024)
Rose Rock Midstream, L.P. equity issuance
0 
89,119 
Proceeds from Issuance of Common Stock
228,546 
0 
Distributions to noncontrolling interests
(21,485)
(19,261)
Payments for Repurchase of Common Stock
904 
4,254 
Payments of Ordinary Dividends, Common Stock
39,720 
31,478 
Proceeds from issuance of common stock under employee stock purchase plan
555 
609 
Intercompany borrowings (advances), net
0 
0 
Net cash provided by financing activities
177,611 
305,630 
Effect of exchange rate changes on cash and cash equivalents
1,943 
390 
Change in cash and cash equivalents
197,684 
188,185 
Cash and cash equivalents at beginning of period
58,096 
40,598 
Cash and cash equivalents at end of period
255,780 
228,783 
Parent Company [Member]
 
 
Condensed Cash Flow Statements, Captions [Line Items]
 
 
Net cash provided by operating activities
25,427 
19,092 
Cash flows from investing activities:
 
 
Capital expenditures
(1,350)
(1,105)
Proceeds from sale of long-lived assets
0 
0 
Contributions to equity method investments
0 
0 
Proceeds from sale of common units of equity method investee
60,483 
56,318 
Proceeds from the sale of assets to Rose Rock Midstream L.P.
 
251,181 
Distributions in excess of equity in earnings of affiliates
13,767 
11,676 
Net cash used in investing activities
72,900 
318,070 
Cash flows from financing activities:
 
 
Debt issuance costs
 
(601)
Borrowings on credit facilities and issuance of senior secured notes, net of discount
118,000 
126,000 
Principal payments on credit facilities and other obligations
(148,367)
(161,000)
Rose Rock Midstream, L.P. equity issuance
 
0 
Proceeds from Issuance of Common Stock
228,546 
 
Distributions to noncontrolling interests
0 
0 
Payments for Repurchase of Common Stock
904 
4,254 
Payments of Ordinary Dividends, Common Stock
39,720 
31,478 
Proceeds from issuance of common stock under employee stock purchase plan
555 
609 
Intercompany borrowings (advances), net
(73,009)
(157,632)
Net cash provided by financing activities
85,101 
(228,356)
Effect of exchange rate changes on cash and cash equivalents
0 
0 
Change in cash and cash equivalents
183,428 
108,806 
Cash and cash equivalents at beginning of period
4,559 
9,254 
Cash and cash equivalents at end of period
187,987 
118,060 
Guarantor Subsidiaries [Member]
 
 
Condensed Cash Flow Statements, Captions [Line Items]
 
 
Net cash provided by operating activities
17,351 
18,222 
Cash flows from investing activities:
 
 
Capital expenditures
(11,211)
(73,195)
Proceeds from sale of long-lived assets
0 
20 
Contributions to equity method investments
0 
0 
Proceeds from sale of common units of equity method investee
0 
0 
Proceeds from the sale of assets to Rose Rock Midstream L.P.
 
0 
Distributions in excess of equity in earnings of affiliates
0 
0 
Net cash used in investing activities
(11,211)
(73,175)
Cash flows from financing activities:
 
 
Debt issuance costs
 
0 
Borrowings on credit facilities and issuance of senior secured notes, net of discount
0 
0 
Principal payments on credit facilities and other obligations
0 
0 
Rose Rock Midstream, L.P. equity issuance
 
0 
Proceeds from Issuance of Common Stock
0 
 
Distributions to noncontrolling interests
0 
0 
Payments for Repurchase of Common Stock
0 
0 
Payments of Ordinary Dividends, Common Stock
0 
0 
Proceeds from issuance of common stock under employee stock purchase plan
0 
0 
Intercompany borrowings (advances), net
(6,140)
54,953 
Net cash provided by financing activities
(6,140)
54,953 
Effect of exchange rate changes on cash and cash equivalents
0 
0 
Change in cash and cash equivalents
0 
0 
Cash and cash equivalents at beginning of period
0 
0 
Cash and cash equivalents at end of period
0 
0 
Non-Guarantor Subsidiaries [Member]
 
 
Condensed Cash Flow Statements, Captions [Line Items]
 
 
Net cash provided by operating activities
56,585 
55,462 
Cash flows from investing activities:
 
 
Capital expenditures
(114,151)
(162,656)
Proceeds from sale of long-lived assets
114 
210 
Contributions to equity method investments
(3,448)
(23,461)
Proceeds from sale of common units of equity method investee
0 
0 
Proceeds from the sale of assets to Rose Rock Midstream L.P.
 
0 
Distributions in excess of equity in earnings of affiliates
13,778 
13,077 
Net cash used in investing activities
(103,707)
(172,830)
Cash flows from financing activities:
 
 
Debt issuance costs
 
(5,688)
Borrowings on credit facilities and issuance of senior secured notes, net of discount
165,500 
676,208 
Principal payments on credit facilities and other obligations
(124,514)
(364,024)
Rose Rock Midstream, L.P. equity issuance
 
89,119 
Proceeds from Issuance of Common Stock
0 
 
Distributions to noncontrolling interests
(21,485)
(19,261)
Payments for Repurchase of Common Stock
0 
0 
Payments of Ordinary Dividends, Common Stock
0 
0 
Proceeds from issuance of common stock under employee stock purchase plan
0 
0 
Intercompany borrowings (advances), net
39,191 
(181,841)
Net cash provided by financing activities
58,692 
194,513 
Effect of exchange rate changes on cash and cash equivalents
1,943 
390 
Change in cash and cash equivalents
13,513 
77,535 
Cash and cash equivalents at beginning of period
55,101 
35,445 
Cash and cash equivalents at end of period
68,614 
112,980 
Consolidating Adjustments [Member]
 
 
Condensed Cash Flow Statements, Captions [Line Items]
 
 
Net cash provided by operating activities
(25,448)
(19,819)
Cash flows from investing activities:
 
 
Capital expenditures
0 
0 
Proceeds from sale of long-lived assets
0 
0 
Contributions to equity method investments
0 
0 
Proceeds from sale of common units of equity method investee
0 
0 
Proceeds from the sale of assets to Rose Rock Midstream L.P.
 
(251,181)
Distributions in excess of equity in earnings of affiliates
(13,767)
(11,676)
Net cash used in investing activities
(13,767)
(262,857)
Cash flows from financing activities:
 
 
Debt issuance costs
 
0 
Borrowings on credit facilities and issuance of senior secured notes, net of discount
0 
0 
Principal payments on credit facilities and other obligations
0 
0 
Rose Rock Midstream, L.P. equity issuance
 
0 
Proceeds from Issuance of Common Stock
0 
 
Distributions to noncontrolling interests
0 
0 
Payments for Repurchase of Common Stock
0 
0 
Payments of Ordinary Dividends, Common Stock
0 
0 
Proceeds from issuance of common stock under employee stock purchase plan
0 
0 
Intercompany borrowings (advances), net
39,958 
284,520 
Net cash provided by financing activities
39,958 
284,520 
Effect of exchange rate changes on cash and cash equivalents
0 
0 
Change in cash and cash equivalents
743 
1,844 
Cash and cash equivalents at beginning of period
(1,564)
(4,101)
Cash and cash equivalents at end of period
$ (821)
$ (2,257)
Condensed Consolidating Guarantor Financial Statements (Details Textual) (Guarantor Subsidiaries [Member])
Jun. 30, 2016
Guarantor Subsidiaries [Member]
 
Condensed Financial Statements, Captions [Line Items]
 
Equity method investment, ownership percentage
100.00%