10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________________________________________

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2016

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to                    

Commission File Number: 1-34736

____________________________________________________________ 

SEMGROUP CORPORATION

(Exact name of registrant as specified in its charter)

____________________________________________________________ 

Delaware	20-3533152
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification Number)

Two Warren Place

6120 S. Yale Avenue, Suite 700

Tulsa, OK 74136-4216

(Address of principal executive offices and zip code)

(918) 524-8100

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days:    Yes  x    No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files):    Yes  x    No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer  x Accelerated filer  o Non-accelerated filer  o Smaller reporting company  o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act):    Yeso    No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date:

Class		Outstanding at July 31, 2016
Class A	Common stock, $0.01 par	52,813,816	Shares
Class B	Common stock, $0.01 par	—	Shares

SemGroup Corporation

TABLE OF CONTENTS

	PART I – FINANCIAL INFORMATION
Item 1	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets – June 30, 2016 and December 31, 2015	5
	Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) – Three and Six Months Ended June 30, 2016 and 2015	6
	Condensed Consolidated Statements of Cash Flows – Six Months Ended June 30, 2016 and 2015	7
	Notes to Condensed Consolidated Financial Statements	8
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	41
Item 3	Quantitative and Qualitative Disclosures about Market Risk	64
Item 4	Controls and Procedures	67
	PART II – OTHER INFORMATION
Item 1	Legal Proceedings	68
Item 1A	Risk Factors	68
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	68
Item 3	Defaults Upon Senior Securities	68
Item 4	Mine Safety Disclosures	68
Item 5	Other Information	69
Item 6	Exhibits	69
	SIGNATURE	70

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Cautionary Note Regarding Forward-Looking Statements

Certain matters contained in this Quarterly Report on Form 10-Q include "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995.

All statements, other than statements of historical fact, included in this Form 10-Q regarding the prospects of our industry, our anticipated financial performance, management’s plans and objectives for future operations, business prospects, outcome of regulatory proceedings, market conditions and other matters, may constitute forward-looking statements. In addition, forward-looking statements generally can be identified by the use of forward-looking words such as "may," "will," "expect," "intend," "estimate," "foresee," "project," "anticipate," "believe," "plans," "forecasts," "continue" or "could" or the negative of these terms or variations of them or similar terms. Although we believe that the expectations reflected in these forward-looking statements are reasonable, we cannot assure you that these expectations will prove to be correct. These forward-looking statements are subject to certain known and unknown risks, and uncertainties, as well as assumptions that could cause actual results to differ materially from those reflected in these forward-looking statements. Factors that might cause actual results to differ include, but are not limited to, those discussed in Item 1A of our most recent Annual Report on Form 10-K, entitled "Risk Factors," risk factors discussed in other reports and documents that we file with the Securities and Exchange Commission (the "SEC") and the following:

• The closing, expected timing, and benefits of the proposed transaction pursuant to which we will acquire all of the outstanding common units of our subsidiary, Rose Rock Midstream, L.P. (“Rose Rock”), not already owned by us;

• Our ability to generate sufficient cash flow from operations to enable us to pay our debt obligations and our current and expected dividends or to fund our other liquidity needs;

• The ability of our subsidiary, Rose Rock, to generate sufficient cash flow from operations to provide the level of cash distributions we expect;

• Any sustained reduction in demand for, or supply of, the petroleum products we gather, transport, process, market and store;

• The effect of our debt level on our future financial and operating flexibility, including our ability to obtain additional capital on terms that are favorable to us;

• Our ability to access the debt and equity markets, which will depend on general market conditions and the credit ratings for our debt obligations and equity;

• The loss of, or a material nonpayment or nonperformance by, any of our key customers;

• The amount of cash distributions, capital requirements and performance of our investments and joint ventures;

• The amount of collateral required to be posted from time to time in our purchase, sale or derivative transactions;

• The impact of operational and developmental hazards and unforeseen interruptions;

• Our ability to obtain new sources of supply of petroleum products;

• Competition from other midstream energy companies;

• Our ability to comply with the covenants contained in our credit agreements and the indentures governing our senior notes, including requirements under our credit agreements to maintain certain financial ratios;

• Our ability to renew or replace expiring storage, transportation and related contracts;

• The overall forward markets for crude oil, natural gas and natural gas liquids;

• The possibility that the construction or acquisition of new assets may not result in the corresponding anticipated revenue increases;

• Changes in currency exchange rates;

• Weather and other natural phenomena, including climate conditions;

• A cyber attack involving our information systems and related infrastructure, or that of our business associates;

• The risks and uncertainties of doing business outside of the U.S., including political and economic instability and changes in local governmental laws, regulations and policies;

• Costs of, or changes in, laws and regulations and our failure to comply with new or existing laws or regulations, particularly with regard to taxes, safety and protection of the environment;

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• The possibility that our hedging activities may result in losses or may have a negative impact on our financial results; and

• General economic, market and business conditions.

New factors that could cause actual results to differ materially from those described in forward-looking statements emerge from time to time, and it is not possible for us to predict all such factors, or the extent to which any such factor or combination of factors may cause actual results to differ from those contained in any forward-looking statement.

Readers are cautioned not to place undue reliance on any forward-looking statements contained in this Form 10-Q, which reflect management’s opinions only as of the date hereof. Except as required by law, we undertake no obligation to revise or publicly release the results of any revision to any forward-looking statements. 

_________________________________________________________________________________________________

Investors and others should note that we announce material company information using our investor relations website (www.semgroupcorp.com), SEC filings, press releases, public conference calls and webcasts. We use these channels, as well as social media, to communicate with our investors and the public about our company, our businesses and our results of operations. The information we post on social media could be deemed to be material information. Therefore, we encourage investors, the media and others interested in our company to review the information we post on the social media channels listed on our investor relations website.

As used in this Form 10-Q, and unless the context indicates otherwise, the terms "the Company," "SemGroup," "we," "us," "our," "ours," and similar terms refer to SemGroup Corporation, its consolidated subsidiaries, and its predecessors. We sometimes refer to crude oil, natural gas, natural gas liquids (natural gas liquids, or "NGLs," include ethane, propane, normal butane, iso-butane, and natural gasoline), refined petroleum products and liquid asphalt cement, collectively, as "petroleum products" or "products."

Page 4

PART I. FINANCIAL INFORMATION

Item 1.    Financial Statements

SEMGROUP CORPORATION

Condensed Consolidated Balance Sheets

(In thousands, except par value)

	(Unaudited)
	June 30, 2016			December 31, 2015
ASSETS
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
LIABILITIES AND OWNERS’ EQUITY
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

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SEMGROUP CORPORATION

Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (Loss)

(Dollars in thousands, except per share amounts)

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			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	—			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
Net income	$	9,931		$	28,433		$	3,683		$	34,209
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

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SEMGROUP CORPORATION

Unaudited Condensed Consolidated Statements of Cash Flows

(Dollars in thousands)

	Six Months Ended June 30,
	2016			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	—			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	—			(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 shares, net of offering costs	228,546			—
Rose Rock Midstream, L.P. equity issuance	—			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

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

1. 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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

1. OVERVIEW, Continued

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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

2. 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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

2. ROSE ROCK MIDSTREAM, L.P., Continued

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

Page 11

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

2. ROSE ROCK MIDSTREAM, L.P., Continued

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.

3. 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):

Page 12

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

3. EQUITY METHOD INVESTMENTS, Continued

	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 endedJune 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.

Page 13

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

3. EQUITY METHOD INVESTMENTS, Continued

During the six months endedJune 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 endedJune 30, 2016, we contributed $0.3 million to Glass Mountain related to capital projects.

Page 14

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

4. 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.

5. 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.

Page 15

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

5. SEGMENTS, Continued

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

Page 16

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

5. SEGMENTS, Continued

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.

Page 17

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

5. SEGMENTS, Continued

	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.

Page 18

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

6. 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.

7. 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.

Page 19

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

7. FINANCIAL INSTRUMENTS, Continued

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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

7. FINANCIAL INSTRUMENTS, Continued

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.

8. 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.

Page 21

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

9. 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

Page 22

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

9. LONG-TERM DEBT, Continued

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.

10. 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

Page 23

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

10. COMMITMENTS AND CONTINGENCIES, Continued

(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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

10. COMMITMENTS AND CONTINGENCIES, Continued

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):

Page 25

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

10. COMMITMENTS AND CONTINGENCIES, Continued

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.

11. 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):

Page 26

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

11. EQUITY, Continued

	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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

12. 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):

Page 28

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

12. EARNINGS PER SHARE, Continued

	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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

13. 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.

14. 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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

14.     RELATED PARTY TRANSACTIONS, Continued

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).

15. 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.

Page 31

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

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.

Page 32

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

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

Page 33

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	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

Page 34

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	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	)

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	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

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Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated interim financial statements and the notes thereto included in Part I, Item 1 of this Quarterly Report on Form 10-Q, and our Annual Report on Form 10-K for the year ended December 31, 2015, filed with the SEC.

Overview of Business

Our business is to provide gathering, transportation, storage, distribution, marketing and other midstream services primarily to producers, refiners of petroleum products and other market participants located in the Midwest and Rocky Mountain regions of the United States of America (the "U.S.") and Canada. We, or our significant equity method investees, have an asset base consisting of pipelines, gathering systems, storage facilities, terminals, processing plants and other distribution assets located between North American production and supply areas, including the Gulf Coast, Midwest, Rocky Mountain and Western Canadian regions. We also maintain and operate storage, terminal and marine facilities at Milford Haven in the United Kingdom (the "U.K.") that enable customers to supply petroleum products to markets in the Atlantic Basin. We also operate a network of liquid asphalt cement terminals throughout Mexico. Our operations are conducted directly and indirectly through our primary business segments – Crude Transportation, Crude Facilities, Crude Supply and Logistics, SemGas^®, SemCAMS, SemLogistics and SemMexico.

Our Assets

At June 30, 2016, our segments owned the following:

• Crude Transportation operates crude oil pipelines and truck transportation businesses in the U.S. Crude Transportation’s assets include:

• a 388-mile crude oil gathering and transportation pipeline system with over 630,000 barrels of associated storage capacity in Kansas and northern Oklahoma that is connected to several third-party pipelines and refineries;

• the Wattenberg Oil Trunkline ("WOT"), a 75-mile, 12-inch diameter crude oil gathering pipeline system that transports crude oil from production facilities in the DJ Basin to the pipeline owned by White Cliffs Pipeline, L.L.C. ("White Cliffs"). The WOT has a capacity of approximately 85,000 barrels per day as well as 360,000 barrels of operational storage;

• a 16-mile crude oil pipeline that connects our Platteville, Colorado crude oil terminal to the Tampa, Colorado crude oil market;

• a crude oil trucking fleet of over 270 transport trucks and 270 trailers;

• Maurepas Pipeline, a project underway to build three pipelines to service refineries in the Gulf Coast region, which is expected to be completed in the early part of 2017;

• a 51% ownership interest in White Cliffs, which owns a 527-mile pipeline, consisting of two 12-inch common carrier, crude oil pipelines, that transports crude oil from Platteville, Colorado to Cushing, Oklahoma (the "White Cliffs Pipeline"); and

• a 50% ownership interest in Glass Mountain Pipeline, LLC ("Glass Mountain"), which owns a 215-mile crude oil pipeline in western and north central Oklahoma ("the Glass Mountain Pipeline").

• Crude Facilities operates crude oil storage and terminal businesses in the U.S. Crude Facilities assets include:

• approximately 7.6 million barrels of crude oil storage capacity in Cushing, Oklahoma, of which 6.25 million barrels are leased to customers and 1.35 million barrels are used for crude oil operations and marketing activities; and

• a 30-lane crude oil truck unloading facility with 350,000 barrels of associated storage capacity in Platteville, Colorado which connects to the origination point of the White Cliffs Pipeline.

• Crude Supply and Logistics operates a crude oil marketing business which utilizes our Crude Transportation and Crude Facilities assets for marketing purposes. Additionally, Crude Supply and Logistics' assets include:

• approximately 61,800 barrels of crude oil storage capacity in Trenton and Stanley, North Dakota.

• SemGas, which provides natural gas gathering and processing services in the U.S. SemGas owns and operates gathering systems and four processing plants with 595 million cubic feet per day of capacity.

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• SemCAMS, which provides natural gas gathering and processing services in Alberta, Canada. SemCAMS owns working interests in, and operates, four natural gas processing plants with a combined operating capacity of 695 million cubic feet per day.

• SemLogistics, which provides refined product and crude oil storage services in the U.K. SemLogistics owns a facility in Wales that has multi-product storage capacity of approximately 8.7 million barrels.

• SemMexico, which purchases, produces, stores, and distributes liquid asphalt cement products in Mexico. SemMexico operates an in-country network of twelve asphalt cement terminals and modification facilities and two marine terminals.

Additionally, we hold an 11.78% ownership interest in the general partner of NGL Energy Partners LP ("NGL Energy")(NYSE: NGL) which is reported within Corporate and Other.

Outlook and Recent Developments

We expect commodity prices to remain challenged and costs of capital to remain sharply higher throughout 2016 as compared to 2015. Fee-based and take-or-pay arrangements are a significant component of our portfolio, which serves to somewhat reduce the influence of commodity price fluctuations on our operating results and cash flows. However, producer activities are being impacted by lower energy commodity prices which will reduce our volumes. The credit profiles and financial prospects of certain of our producer customers have been challenged by the current market conditions, which ultimately may result in further reductions of our volumes, or in re-negotiation of certain contractual provisions affecting our revenues. Such reductions as well as further or prolonged declines in energy commodity prices may result in non-cash impairments of our assets.

Certain of our producer customers operating in Oklahoma have chosen to adjust plans for production following the release of the Oklahoma Corporation Commission's Regional Earthquake Response Plan (the "OCC Plan") which curtails the amount of volume that can be injected into disposal wells.

On April 27, 2016, we sold all of our NGL Energy limited partner units for $13.00 per unit. We recorded a gain of $9.1 million in the second quarter related to this transaction. Subsequent to this transaction, our remaining general partner investment in NGL Energy is not material and is not expected to be material for the foreseeable future. As our investment in NGL Energy is its only asset, SemStream is no longer a reportable segment and its historical results have been included with Corporate and Other.

On May 1, 2016, Midstates Petroleum Company, Inc. and Midstates Petroleum Company LLC (together, “Midstates”), a customer of our SemGas segment, announced that they have filed for voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code.  The bankruptcy court granted Midstates' motions seeking authority to pay expenses associated with production operation activities, drilling and completion activities, costs associated with gathering, processing, transportation and marketing, and expenses related to joint interest billings for non-operated properties.  As a result, we do not currently expect this event to have a material impact on our financial condition or future results of operations.

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.

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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.

On June 23, 2016, U.K. voters approved a referendum to leave the European Union ("EU"). It is currently unknown what, if any, impact this will have on our SemLogistics segment. Oil trading and storage is not expected to be significantly impacted as a whole. However, SemLogistics receives and delivers products to the EU and tariffs and taxes related to these transactions could change subsequent to the U.K.'s exit from the EU. Additionally, it is uncertain what changes in legislation will occur subsequent to the exit which could impact our business.

Non-GAAP Financial Measure

We define Adjusted gross margin as total revenues minus cost of products sold and unrealized gain (loss) on derivatives. Adjusted gross margin is not a financial measure presented in accordance with GAAP. We believe that the presentation of this non-GAAP financial measure provides useful information to investors in assessing our financial condition and results of operations. Operating income is the GAAP measure most directly comparable to Adjusted gross margin. Our non-GAAP financial measure should not be considered as an alternative to the most directly comparable GAAP financial measure. This non-GAAP financial measure has important limitations as an analytical tool because it excludes some, but not all, items that affect the most directly comparable GAAP financial measure. You should not consider Adjusted gross margin as a substitute for analysis of our results as reported under GAAP. Because Adjusted gross margin may be defined differently by other companies in our industry, our definition of this non-GAAP financial measure may not be comparable to similarly titled measures of other companies, thereby diminishing its utility.

Management compensates for the limitation of Adjusted gross margin as an analytical tool by reviewing the comparable GAAP measure, understanding the difference between Adjusted gross margin on the one hand, and operating income on the other hand, and incorporating this knowledge into its decision-making processes. We believe that investors benefit from having access to the same financial measure that our management uses in evaluating our operating results.

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Results of Operations

Consolidated Results of Operations

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands)	2016			2015			2016			2015
Revenue	$	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	—			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

Revenue and Expenses

Revenue and expenses are analyzed by operating segment below.

General and administrative expense

General and administrative expenses of each corporate department are allocated to the segments based on criteria such as actual usage, headcount and estimates of effort or benefit. The method for allocating cost is based on the type of service being provided. For example, internal audit costs are based on an estimate of effort attributable to a segment. In contrast, accounting department costs are allocated based on the number of transactions processed for a given segment compared to the total number processed.

Interest expense

Interest expense increased in the three months ended June 30, 2016, to $18.9 million from $16.8 million in the three months ended June 30, 2015. Interest expense increased in the six months ended June 30, 2016, to $37.8 million from $31.4 million in the six months ended June 30, 2015. In both cases, the increase is primarily due to the issuance of $350 million of 5.625% senior unsecured notes on May 14, 2015 by Rose Rock.

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Loss (gain) on sale or impairment of equity method investment

During the three months ended June 30, 2016, we sold all of our NGL Energy limited partner units and recorded a $9.1 million gain on the sale of equity method investments. During the six months ended June 30, 2016, we recognized a $30.6 million net loss on sale or impairment of equity method investment compared to a $14.5 million gain from sales of limited partner units of NGL Energy for the same period in 2015. During the six months ended June 30, 2016, we recorded a $39.8 million impairment to our equity method investment in NGL Energy based on a fair value of the common units being lower than the book value and NGL Energy's announced decreases in distributions and guidance. During the six months ended June 30, 2016, this impairment was offset by gains described above on the sale of common units of NGL Energy.

Income tax expense (benefit)

We reported an income tax benefit of $16.7 million for the six months ended June 30, 2016 compared to an expense of $19.6 million for the six months ended June 30, 2015. 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. 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.

Results of Operations by Reporting Segment

Crude Transportation

	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016		2015			2016		2015
Revenue:
Pipeline transportation	$	6,672	$	8,390		$	14,747	$	16,170
Truck transportation	14,099		17,597			30,433		33,865
Total revenue	20,771		25,987			45,180		50,035
Expenses:
Operating	16,865		21,127			35,482		39,455
General and administrative	1,109		2,582			2,255		4,487
Depreciation and amortization	6,171		9,038			12,030		17,656
Loss (gain) on disposal of long-lived assets, net	1,714		(22		)	1,781		133
Total expenses	25,859		32,725			51,548		61,731
Earnings from equity method investments	17,078		17,683			37,917		38,547
Operating income	$	11,990	$	10,945		$	31,549	$	26,851

Adjusted gross margin

Adjusted gross margin in this segment is generated by providing fee-based services, which are included in service revenue in our unaudited condensed consolidated statements of operations and comprehensive income (loss). As there is no cost of sales or derivative activity associated with our Crude Transportation revenue, Adjusted gross margin is equivalent to revenue for this segment. This segment's prior year revenue included product revenue related to certain commodity purchase and sales activity performed around our pipelines. In the current year, these product revenues are reflected in the Crude Supply and Logistics segment and have been replaced in the Crude Transportation segment with intersegment transportation fees which have been charged to Crude Supply and Logistics and which are reported as service revenue. With the exception of intersegment truck transportation charges, these intersegment charges did not exist in the prior year.

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Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Pipeline transportation revenue decreased to $6.7 million in the three months ended June 30, 2016, from $8.4 million in the three months ended June 30, 2015. The change is due to a decrease in fixed margin activity which is now reported with other product revenues in the Crude Supply and Logistics segment and was replaced in the Crude Transportation segment with intersegment usage fees. Beginning January 2016, Crude Transportation is charging Crude Supply and Logistics to move barrels through the pipeline system.

Truck transportation revenue decreased to $14.1 million in three months ended June 30, 2016, compared to $17.6 million for the same period in 2015 as a result of lower volumes.

Operating expense

Operating expense decreased to $16.9 million in the three months ended June 30, 2016, from $21.1 million for the three months ended June 30, 2015. The decrease included reductions to field expenses of $1.4 million, maintenance and repair of $1.4 million, allocated overhead of $1.3 million, outside services expense of $1.1 million and office expense of $0.3 million. These costs were partially offset by increases in employment costs, insurance and taxes and other expenses of $0.7 million, $0.3 million and $0.1 million, respectively.

General and administrative expense

General and administrative expense decreased to $1.1 million in the three months ended June 30, 2016, from $2.6 million in the three months ended June 30, 2015. The decrease is a result of a reduction in overhead allocation of $1.7 million, partially offset with an increase in outside services and insurance and taxes of $0.1 million and $0.1 million, respectively.

Depreciation and amortization expense

Depreciation and amortization expense decreased to $6.2 million in the three months ended June 30, 2016, from $9.0 million in the three months ended June 30, 2015. Approximately $3.2 million of the decrease in depreciation expense is due to prior year expense related to the revision of the estimated useful life relating to a 163-mile section of the Kansas and Oklahoma pipeline system. Project completions increased depreciation expense by $0.2 million. Amortization expense related to customer relationship intangible assets of our truck transportation operations increased by $0.2 million.

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

Crude Transportation recorded a loss on disposal of long-lived assets of $1.7 million in the three months ended June 30, 2016, compared to a gain of $22 thousand in the three months ended June 30, 2015. The loss in the three months ended June 30, 2016 is the result of an abandonment of a 13-mile section of the Kansas and Oklahoma pipeline system.

Earnings from equity method investments

Crude Transportation’s earnings from equity method investments decreased slightly in the three months ended June 30, 2016, to $17.1 million from $17.7 million in the three months ended June 30, 2015.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Pipeline transportation revenue decreased to $14.7 million in the six months ended June 30, 2016, from $16.2 million in the six months ended June 30, 2015. The change is due to a decrease in fixed margin activity, which is now reported with other product revenues in the Crude Supply and Logistics segment and was replaced in the Crude Transportation segment with intersegment usage fees. Beginning January 2016, Crude Transportation is charging Crude Supply and Logistics to move barrels through the pipeline system.

Truck transportation revenue decreased to $30.4 million in six months ended June 30, 2016, compared to $33.9 million for the same period in 2015 as a result of lower volumes.

Operating expense

Operating expense decreased to $35.5 million in the six months ended June 30, 2016, from $39.5 million for the six months ended June 30, 2015. The decrease included reductions to maintenance and repair of $3.0 million, allocated overhead of $2.4 million, outside services expense of $1.7 million, field expenses of $0.6 million and office expense of $0.6 million.

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These costs were partially offset by increases in employment costs, insurance and taxes, rent, travel and other expenses of $2.7 million, $1.3 million, $0.1 million, $0.1 million and $0.1 million, respectively.

General and administrative expense

General and administrative expense decreased to $2.3 million in the six months ended June 30, 2016, from $4.5 million in the six months ended June 30, 2015. The decrease is a result of a reduction in overhead allocation of $2.4 million, partially offset with increases in outside services and insurance and taxes of $0.1 million and $0.1 million, respectively.

Depreciation and amortization expense

Depreciation and amortization expense decreased to $12.0 million in the six months ended June 30, 2016, from $17.7 million in the six months ended June 30, 2015. Approximately $6.3 million of the decrease in depreciation expense is due to prior year expense related to the revision of the estimated useful life relating to a 163-mile section of the Kansas and Oklahoma pipeline system. Project completions increased depreciation expense by $0.2 million. Amortization expense related to customer relationship intangible assets of our truck transportation operations increased by $0.4 million.

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

Crude Transportation recorded a loss on disposal of long-lived assets of $1.8 million in the six months ended June 30, 2016, compared to a loss of $133 thousand in the six months ended June 30, 2015. The loss in the six months ended June 30, 2016 is primarily the result of an abandonment of a 13-mile section of the Kansas and Oklahoma pipeline system.

Earnings from equity method investments

Crude Transportation’s earnings from equity method investments decreased slightly to $37.9 million in the six months ended June 30, 2016, from $38.5 million in the six months ended June 30, 2015.

Crude Facilities

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2016		2015		2016		2015
Revenue	$	12,826	$	11,402	$	25,705	$	22,807
Expenses:
Operating	2,422		2,398		4,540		4,669
General and administrative	1,033		1,041		2,207		1,773
Depreciation and amortization	1,921		1,406		3,805		2,775
Total expenses	5,376		4,845		10,552		9,217
Operating income	$	7,450	$	6,557	$	15,153	$	13,590

Adjusted gross margin

Adjusted gross margin in this segment is generated by providing fee-based services. Revenues from fee-based services are included in service revenue in our unaudited condensed consolidated statements of operations and comprehensive income (loss). As there is no cost of sales or derivative activity associated with our Crude Facilities revenue, Adjusted gross margin is equivalent to revenue for this segment.

Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Revenue increased to $12.8 million in the three months ended June 30, 2016, from $11.4 million for the three months ended June 30, 2015. Effective January 2016, Crude Facilities began charging Crude Supply and Logistics for the use of storage and unloading facilities. As a result, the increase was primarily due to intersegment pump-over activity of $1.2 million, the addition of intersegment storage of $1.2 million and intersegment unloading activity of $0.1 million. These increases were partially offset by a reduction in third-party storage revenue of $0.7 million, as the average capacity used internally for crude oil operations and marketing activities increased to 1.3 million barrels from 1.1 million barrels, third-party unloading revenue of $0.3 million and third-party pump-over of $0.1 million.

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Operating expense

Operating expense increased to $2.4 million in the three months ended June 30, 2016, from $2.4 million for the three months ended June 30, 2015, as a result of increased repair and maintenance expenses.

General and administrative expense

General and administrative expense remained constant at $1.0 million in the three months ended June 30, 2016 and 2015.

Depreciation and amortization expense

Depreciation and amortization expense increased to $1.9 million in the three months ended June 30, 2016, from $1.4 million in the three months ended June 30, 2015. The increase was primarily due to incremental expense due to project completions between periods.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Revenue increased to $25.7 million in the six months ended June 30, 2016, from $22.8 million for the six months ended June 30, 2015. Effective January 2016, Crude Facilities began charging Crude Supply and Logistics for the use of storage and unloading facilities. As a result, the increase was primarily due to intersegment pump-over activity of $2.7 million, intersegment storage of $2.4 million and intersegment unloading activity of $0.2 million. These increases were partially offset by a reduction in third-party storage revenue of $1.2 million, as the average capacity used internally for crude oil operations and marketing activities increased to 1.3 million from 1.1 million, and hird-party unloading revenue of $1.2 million.

Operating expense

Operating expense showed a slight decrease in the six months ended June 30, 2016, at $4.5 million compared to $4.7 million for the six months ended June 30, 2015, primarily as a result of a reduction in field expense.

General and administrative expense

General and administrative expense increased to $2.2 million in the six months ended June 30, 2016, from $1.8 million in the six months ended June 30, 2015, largely due to higher overhead expense allocations.

Depreciation and amortization expense

Depreciation and amortization expense increased to $3.8 million in the six months ended June 30, 2016, from $2.8 million in the six months ended June 30, 2015. The increase was primarily due to incremental expense due to project completions between periods.

Crude Supply and Logistics

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2016		2015		2016		2015
Revenue	$	143,201	$	189,476	$	319,823	$	292,437
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	136,417		176,695		297,767		276,653
Operating	689		155		1,527		348
General and administrative	503		233		1,069		396
Depreciation and amortization	40		40		80		79
Loss (gain) on disposal of long-lived assets, net	—		—		227		(3		)
Total expenses	137,649		177,123		300,670		277,473
Operating income	$	5,552	$	12,353	$	19,153	$	14,964

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Adjusted gross margin in this segment is generated from marketing activities. Revenues from marketing activities are included in product revenue in our unaudited condensed consolidated statements of operations and comprehensive income (loss).

The following table shows the Adjusted gross margin generated by this segment’s marketing activities:

	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016			2015		2016		2015
Revenues	$	143,201		$	189,476	$	319,823	$	292,437
Less: Costs of products sold, exclusive of depreciation	136,417			176,695		297,767		276,653
Less: Unrealized gain (loss) on derivatives	(4,477		)	1,415		71		(1,116		)
Adjusted gross margin	$	11,261		$	11,366	$	21,985	$	16,900

The following table presents a reconciliation of operating income to Adjusted gross margin, the most directly comparable GAAP financial measure for each of the periods indicated.

	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016			2015		2016		2015
Reconciliation of operating income to Adjusted gross margin:
Operating income	$	5,552		$	12,353	$	19,153	$	14,964
Add:
Operating expense	689			155		1,527		348
General and administrative expense	503			233		1,069		396
Depreciation and amortization expense	40			40		80		79
Loss (gain) on disposal of long-lived assets, net	—			—		227		(3		)
Less:
Unrealized gain (loss) on derivatives	(4,477		)	1,415		71		(1,116		)
Adjusted gross margin	$	11,261		$	11,366	$	21,985	$	16,900

Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Revenue decreased to $143.2 million in the three months ended June 30, 2016, from $189.5 million in the three months ended June 30, 2015.

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands)	2016			2015			2016			2015
Gross product revenue	$	761,254		$	757,338		$	1,393,943		$	1,333,084
Nonmonetary transaction adjustment	(613,576		)	(569,277		)	(1,074,191		)	(1,039,531		)
Unrealized gain (loss) on derivatives, net	(4,477		)	1,415			71			(1,116		)
Product revenue	$	143,201		$	189,476		$	319,823		$	292,437

Gross product revenue increased in the three months ended June 30, 2016, to $761.3 million from $757.3 million in the three months ended June 30, 2015. The increase was primarily due to an increase in the volume sold to 18.0 million barrels at an average sales price of $42 per barrel in the three months ended June 30, 2016, compared to volume sold of 13.8 million barrels at an average sales price of $55 per barrel in the three months ended June 30, 2015.

Gross product revenue was reduced by $613.6 million and $569.3 million during the three months ended June 30, 2016 and 2015, respectively, in accordance with Accounting Standards Codification ("ASC") 845-10-15, "Nonmonetary Transactions". ASC 845-10-15 requires that certain transactions -- those where inventory is purchased from a customer then resold to the same customer -- to be presented in the income statement on a net basis, resulting in a reduction of revenue and costs of products sold by the same amount.

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Cost of Products Sold

Costs of products sold decreased in the three months ended June 30, 2016, to $136.4 million (including $7.7 million of intersegment charges) from $176.7 million in the three months ended June 30, 2015 (including $3.6 million of intersegment charges). Costs of products sold reflects reductions of $613.6 million and $569.3 million in the three months ended June 30, 2016 and 2015, respectively, in accordance with ASC 845-10-15. There was an increase in the barrels sold, as described above, combined with a decrease in the average per barrel cost of crude oil to $42 in the three months ended June 30, 2016 from $54 in the three months ended June 30, 2015.

Adjusted Gross Margin

This segment's Adjusted gross margin decreased slightly in the three months ended June 30, 2016, to $11.3 million from $11.4 million for the same period in 2015. The decrease was primarily due to an increase in barrels sold, as described above, and offset by a lower spread between the acquisition and sale price for volumes of crude oil sold, as the excess of our average sales price per barrel over our average acquisition cost per barrel decreased to approximately $0.63 in the three months ended June 30, 2016, from approximately $0.83 in the same period in 2015. The increase in volume was primarily due to crude oil blending and transactions related to contango market conditions.

Operating expense

Operating expense increased to $0.7 million in the three months ended June 30, 2016, from $0.2 million for the three months ended June 30, 2015. The increase is due to higher employment costs of $0.4 million, outside services of $0.1 million and other expense of $0.1 million.

General and administrative expense

General and administrative expense increased to $0.5 million in the three months ended June 30, 2016, from $0.2 million in the three months ended June 30, 2015. This increase is primarily due to additional overhead allocation.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Revenue increased to $319.8 million in the six months ended June 30, 2016, from $292.4 million in the three months ended June 30, 2015.

Gross product revenue increased in the six months ended June 30, 2016, to $1.4 billion from $1.3 billion in the six months ended June 30, 2015. The increase was primarily due to an increase in the volume sold to 37.6 million barrels at an average sales price of $37 per barrel in the six months ended June 30, 2016, compared to volume sold of 25.0 million barrels at an average sales price of $53 per barrel in the six months ended June 30, 2015.

Gross product revenue was reduced by $1.1 billion and $1.0 billion during the six months ended June 30, 2016 and 2015, respectively, in accordance with ASC 845-10-15, "Nonmonetary Transactions". ASC 845-10-15 requires that certain transactions -- those where inventory is purchased from a customer then resold to the same customer -- to be presented in the income statement on a net basis, resulting in a reduction of revenue and costs of products sold by the same amount.

Cost of Products Sold

Costs of products sold increased in the six months ended June 30, 2016, to $297.8 million (including $17.6 million of intersegment charges) from $276.7 million in the six months ended June 30, 2015 (including $7.3 million of intersegment charges). Costs of products sold reflects reductions of $1.1 billion and $1.0 billion in the six months ended June 30, 2016 and 2015, respectively, in accordance with ASC 845-10-15. There was an increase in the barrels sold, as described above, combined with a decrease in the average per barrel cost of crude oil to $36 in the six months ended June 30, 2015 from $53 in the three months ended June 30, 2015.

Adjusted Gross Margin

This segment's Adjusted gross margin increased in the six months ended June 30, 2016, to $22.0 million from $16.9 million for the same period in 2015. The increase was primarily due to an increase in barrels sold, as described above, and offset by a lower spread between the acquisition and sale price for volumes of crude oil sold, as the excess of our average sales price per barrel over our average acquisition cost per barrel decreased to approximately $0.59 in the six months ended June 30,

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2016, from approximately $0.67 in the same period in 2015 . The increase in volume was primarily due to crude oil blending and transactions related to contango market conditions.

Operating expense

Operating expense increased to $1.5 million in the six months ended June 30, 2016, from $0.3 million for the six months ended June 30, 2015. The increase is due to higher employment costs of $0.8 million, outside services of $0.2 million and other expense of $0.1 million.

General and administrative expense

General and administrative expense increased to $1.1 million in the six months ended June 30, 2016, from $0.4 million in the six months ended June 30, 2015. This increase is due to additional overhead allocation.

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

Crude Supply and Logistics recognized a net gain on disposal of long-lived assets of $227 thousand in the six months ended June 30, 2016, primarily due to a write-down of capitalized line fill taken out of service.

SemGas

	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016			2015		2016			2015
Revenue	$	50,721		$	66,721	$	96,987		$	132,978
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	27,171			36,160		51,780			77,429
Operating	8,872			8,799		16,224			16,845
General and administrative	2,375			2,641		4,620			4,704
Depreciation and amortization	9,194			7,359		18,116			14,497
Loss (gain) on disposal or impairment, net	(1		)	1,450		13,051			1,449
Total expenses	47,611			56,409		103,791			114,924
Operating income (loss)	$	3,110		$	10,312	$	(6,804	)	$	18,054

Adjusted gross margin in this segment is generated from fee-based and percent of proceeds contracts for gathering and processing services. Fee-based revenues are included in service revenue and percent of proceeds revenue is included in product revenue in our unaudited condensed consolidated statements of operations and comprehensive income (loss).

The following table shows the Adjusted gross margin generated in the three months ended June 30, 2016 and 2015.

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2016		2015		2016		2015
Revenue	$	50,721	$	66,721	$	96,987	$	132,978
Less: Cost of products sold, exclusive of depreciation	27,171		36,160		51,780		77,429
Adjusted gross margin	$	23,550	$	30,561	$	45,207	$	55,549

The following table presents a reconciliation of operating income to Adjusted gross margin, the most directly comparable GAAP financial measure for each of the periods indicated.

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	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016			2015		2016			2015
Reconciliation of operating income to Adjusted gross margin:
Operating income (loss)	$	3,110		$	10,312	$	(6,804	)	$	18,054
Add:
Operating expense	8,872			8,799		16,224			16,845
General and administrative expense	2,375			2,641		4,620			4,704
Depreciation and amortization expense	9,194			7,359		18,116			14,497
Loss (gain) on disposal or impairment, net	(1		)	1,450		13,051			1,449
Adjusted gross margin	$	23,550		$	30,561	$	45,207		$	55,549

Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Revenue decreased in the three months ended June 30, 2016, to $50.7 million from $66.7 million for the three months ended June 30, 2015. This decrease is the result of lower prices, lower volume (28,464 MMcf versus 37,305 MMcf), and decreased gathering and processing fees ($10.9 million versus $15.7 million). The decrease in revenue was affected by a lower average natural gas NYMEX price of $1.95/mmbtu versus $2.64/mmbtu offset by an increase in the average NGL basket price to $0.67/gallon in the three months ended June 30, 2016 versus $0.55/gallon for the same period in 2015. The decrease in volume is primarily a result of decreased drilling and production in the area served by our gas plants in northern Oklahoma, which is caused by continued reduction in capital expenditures and new production.

Costs of products sold

Costs of products sold decreased in the three months ended June 30, 2016, to $27.2 million from $36.2 million in the three months ended June 30, 2015. This decrease is primarily related to lower volume and prices as described above.

Operating expense

Operating expense increased in the three months ended June 30, 2016, to $8.9 million from $8.8 million for the three months ended June 30, 2015. This increase is due to higher maintenance and repairs of $1.3 million and $0.3 million in property taxes. These increases were offset by decreases in outside services, equipment leases, field expenses (which includes materials and supplies, lubricants, water disposal, electricity and fuel), and employee related expenses of approximately $0.5 million, $0.4 million, $0.4 million, and $0.2 million, respectively.

General and administrative expense

General and administrative expense decreased slightly in the three months ended June 30, 2016, to $2.4 million from $2.6 million for the three months ended June 30, 2015.

Depreciation and amortization expense

Depreciation and amortization expense increased in the three months ended June 30, 2016, to $9.2 million from $7.4 million in the three months ended June 30, 2015. The increase is primarily incremental assets placed in-service since the prior year due to expansion in northern Oklahoma.

Loss (gain) on disposal or impairment, net

Net loss on disposal or impairment decreased from a loss of $1.5 million in the three months ended June 30, 2015 due to the prior year write down of certain gas gathering and compression assets in Kansas to their estimated net realizable value.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Revenue decreased in the six months ended June 30, 2016, to $97.0 million from $133.0 million for the six months ended June 30, 2015. This decrease is the result of lower prices, lower volume (60,402 MMcf versus 72,824 MMcf) and

Page 52

decreased gathering and processing fees ($23.7 million versus $30.2 million). The decrease in revenue was affected by a lower average natural gas NYMEX price of $2.02/mmbtu versus $2.81/mmbtu offset by higher average NGL basket price of $0.59/gallon versus $0.56/gallon for the same period in 2015. The decrease in volume is primarily a result of decreased drilling and production in the area served by our gas plants in northern Oklahoma, which is caused by continued reduction in capital expenditures and new production.

Costs of products sold

Costs of products sold decreased in the six months ended June 30, 2016, to $51.8 million from $77.4 million in the six months ended June 30, 2015. This decrease is primarily related to lower volume and prices as described above.

Operating expense

Operating expense decreased in the six months ended June 30, 2016, to $16.2 million from $16.8 million for the six months ended June 30, 2015. This decrease is due primarily to lower outside services, field expenses (which includes materials and supplies, lubricants, water disposal, electricity and fuel), employee expenses and equipment leases of approximately $0.8 million, $0.8 million, $0.6 million and $0.2 million, respectively. These decreases were offset by an increase in maintenance and repairs of approximately $1.2 million and property taxes of $0.6 million.

General and administrative expense

General and administrative expense remained constant at $4.6 million in the six months ended June 30, 2016 and 2015.

Depreciation and amortization expense

Depreciation and amortization expense increased in the six months ended June 30, 2016, to $18.1 million from $14.5 million in the six months ended June 30, 2015. The increase is primarily a result of incremental assets placed in-service since the prior year due to expansion in northern Oklahoma.

Loss (gain) on disposal or impairment, net

Loss on disposal or impairment, net increased to $13.1 million in the six months ended June 30, 2016, from $1.4 million in the six months ended June 30, 2015. This increase is primarily due to a $13.1 million goodwill impairment recorded at March 31, 2016. The prior year loss is due to the write down of certain gas gathering and compression assets in Kansas to their estimated net realizable value.

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 OCC Plan which 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 assets, finite-lived intangible and goodwill for impairment at March 31, 2016. No impairment was indicated for SemGas' long-lived assets and finite-lived intangible 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.

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SemCAMS

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2016		2015		2016		2015
Revenue	$	33,815	$	35,915	$	64,681	$	65,639
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	39		76		76		208
Operating	21,245		23,665		38,340		41,996
General and administrative	3,531		4,193		7,361		7,569
Depreciation and amortization	4,294		3,187		8,245		6,253
Total expenses	29,109		31,121		54,022		56,026
Operating income	$	4,706	$	4,794	$	10,659	$	9,613

Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Revenue in the three months ended June 30, 2016, decreased to $33.8 million from $35.9 million for the three months ended June 30, 2015. This decrease is primarily due to lower operating cost recoveries, lower maintenance capital recovery, foreign exchange changes and lower overhead recoveries of $2.4 million, $1.8 million, $1.6 million and $0.4 million, respectively. In addition, a 30-day unplanned outage at the K3 plant decreased gathering and processing revenue by $2.5 million. These decreases were offset, in part, by $3.4 million of higher gathering and processing revenue, excluding the outage period, and fees of $3.1 million on true-up of take-or-pay minimum volume commitments.

Operating expense

Operating expense decreased in the three months ended June 30, 2016, to $21.2 million from $23.7 million for the three months ended June 30, 2015. This decrease is primarily due to lower costs for power, contract labor, accretion and short term salary incentives of $1.6 million, $0.6 million, $0.5 million and $0.5 million, respectively. Foreign exchange changes reduced operating expense by $1.0 million. These decreases were partially offset by repair costs of $1.6 million related to the K3 plant outage.

General and administrative expense

General and administrative expense decreased to $3.5 million in the three months ended June 30, 2016, from $4.2 million in three months ended June 30, 2015 due to lower compensation costs.

Depreciation and amortization expense

Depreciation and amortization expense increased in the three months ended June 30, 2016, to $4.3 million from $3.2 million for the three months ended June 30, 2015, as a result of projection completions.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Revenue in the six months ended June 30, 2016, decreased to $64.7 million from $65.6 million for the six months ended June 30, 2015. This decrease is primarily due to foreign exchange changes, lower maintenance capital recovery, lower operating costs recoveries and lower overhead recoveries of $5.0 million, $1.9 million, $0.8 million and $0.4 million, respectively. In addition, a 30-day unplanned outage at the K3 plant decreased gathering and processing revenue by $2.5 million. These decreases were offset, in part, by $6.6 million higher gathering and processing revenue, excluding the outage period, and fees of $3.1 million on true-up of take-or-pay minimum volume commitments.

Operating expense

Operating expense decreased in the six months ended June 30, 2016, to $38.3 million from $42.0 million for the six months ended June 30, 2015. This decrease is primarily due to lower costs for power, accretion and short term salary incentives of $2.1 million, $1.2 million and $1.0 million, respectively. Foreign exchange changes reduced operating expense by $2.9 million. These decreases were partially offset by repair costs of $1.6 million related to the K3 plant outage, higher greenhouse gas credit purchases of $1.2 million and higher general expenses of $0.6 million.

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General and administrative expense

General and administrative expense showed a slight decrease to $7.4 million for the six months ended June 30, 2016, compared to $7.6 million for the six months ended June 30, 2015.

Depreciation and amortization expense

Depreciation and amortization expense increased in the six months ended June 30, 2016, to $8.2 million from $6.3 million for the six months ended June 30, 2015. This increase includes $2.6 million related to project completions, offset by favorable foreign exchange changes of $0.6 million.

SemLogistics

	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016		2015			2016		2015
Revenue	$	5,932	$	6,279		$	12,312	$	11,431
Expenses:
Operating	2,113		2,041			4,094		4,655
General and administrative	1,817		2,246			3,557		3,923
Depreciation and amortization	1,983		2,154			3,943		4,194
Total expenses	5,913		6,441			11,594		12,772
Operating income (loss)	$	19	$	(162	)	$	718	$	(1,341	)

Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Revenue in the three months ended June 30, 2016, decreased to $5.9 million from $6.3 million for the three months ended June 30, 2015. The decrease is due, in part, to lower throughput revenues of $0.7 million and the negative impact of foreign exchange rates of $0.4 million. These were offset by an increase of $0.8 million in storage revenue due to additional storage capacity being leased.

General and administrative expense

General and administrative expense decreased slightly in the three months ended June 30, 2016, to $1.8 million from $2.2 million for the three months ended June 30, 2015. This decrease is primarily due to lower employee related expenses of $0.3 million and the impact of foreign exchange rates of $0.1 million.

General

In every other category of expense, the amounts for the second quarter of 2016 are roughly equivalent to those of the second quarter of 2015.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Revenue in the six months ended June 30, 2016, increased to $12.3 million from $11.4 million for the six months ended June 30, 2015. This increase is primarily due to higher storage revenue of $2.1 million due to additional storage capacity being contracted. This increase was offset, in part, by a decrease in throughput revenues of $0.5 million and the negative impact of foreign exchange rates of $0.8 million.

Operating expense

Operating expense decreased in the six months ended June 30, 2016, to $4.1 million from $4.7 million for the six months ended June 30, 2016. This decrease is primarily due to lower site maintenance costs of $0.4 million, the impact of foreign exchange rates which reduced operating expenses by $0.2 million and a reduction in employee costs of $0.2 million. These decreases were offset by an increase in waste disposal costs of $0.4 million.

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General

In every other category of expense, the amounts for the six months ended June 30, 2016, are roughly equivalent to those of the six months ended June 30, 2015.

SemMexico

	Three Months Ended June 30,					Six Months Ended June 30,
(in thousands)	2016			2015		2016			2015
Revenue	$	30,286		$	51,459	$	60,420		$	112,949
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	23,390			41,240		47,046			92,747
Operating	2,101			2,340		3,881			5,277
General and administrative	2,799			2,823		5,218			4,765
Depreciation and amortization	949			1,037		1,890			2,090
Gain on disposal of long-lived assets, net	(28		)	—		(67		)	(19		)
Total expenses	29,211			47,440		57,968			104,860
Operating income	$	1,075		$	4,019	$	2,452		$	8,089

Three months ended June 30, 2016 versus three months ended June 30, 2015

Revenue

Revenue decreased in the three months ended June 30, 2016, to $30.3 million from $51.5 million in the three months ended June 30, 2015. A decrease in the average sales price per metric ton between periods accounts for $13.9 million of the decrease and lower volumes between periods (82,109 metric tons in the three months ended June 30, 2016, compared to 85,037 metric tons in the three months ended June 30, 2015) resulted in a decrease of $1.7 million. The change in the foreign currency exchange rate between periods resulted in an additional decrease of $5.4 million.

Costs of products sold

Costs of products sold decreased in the three months ended June 30, 2016, to $23.4 million from $41.2 million in the three months ended June 30, 2015. A decrease in the average cost of asphalt and lower volume between the periods accounted for decreases of $12.1 million and $1.4 million, respectively. The change in the foreign currency exchange rate between periods resulted in a decrease of $4.3 million.

Operating expense

Operating expense decreased in the three months ended June 30, 2016, to $2.1 million from $2.3 million in the three months ended June 30, 2015. The decrease is due to foreign exchange variances of $0.4 million, offset by increased maintenance and employee related expense of $0.1 million and $0.1 million, respectively.

General

In every other category of expense, the amounts for the three months ended June 30, 2016, are roughly equivalent to those of the three months ended June 30, 2015.

Six months ended June 30, 2016 versus six months ended June 30, 2015

Revenue

Revenue decreased in the six months ended June 30, 2016, to $60.4 million from $112.9 million in the six months ended June 30, 2015. A decrease in the average sales price per metric ton between periods accounts for $27.8 million of the decrease and lower volumes between periods (156,116 metric tons in the six months ended June 30, 2016, compared to 176,383 metric tons in the six months ended June 30, 2015) resulted in a decrease of $12.8 million. The change in the foreign currency exchange rates between periods resulted in an additional decrease of $11.6 million.

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Costs of products sold

Costs of products sold decreased in the six months ended June 30, 2016, to $47.0 million from $92.7 million in the six months ended June 30, 2015. A decrease in the average cost of asphalt and lower volume between the periods accounted for decreases of $25.8 million and $10.6 million, respectively. The change in the foreign currency exchange variances between periods resulted in a decrease of $9.3 million.

Operating expense

Operating expense decreased in the six months ended June 30, 2016, to $3.9 million from $5.3 million in the six months ended June 30, 2015. The decrease is due to reduced bad debt expense of $0.7 million and favorable impact of foreign currency exchange variances of $0.7 million.

General and administrative expense

General and administrative expense increased in the six months ended June 30, 2016, to $5.2 million from $4.8 million in the six months ended June 30, 2015. The increase is primarily due to higher employment and contract labor expenses of $0.2 million, outside services of $0.1 million and promotional costs of $0.1 million.

General

In every other category of expense, the amounts for the six months ended June 30, 2016, are roughly equivalent to those of the six months ended June 30, 2015.

Corporate and Other

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands)	2016			2015			2016			2015
Revenue	$	(10,175	)	$	(10,013	)	$	(22,880	)	$	(12,740	)
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	(10,175		)	(10,013		)	(22,880		)	(10,807		)
Operating	400			275			811			645
General and administrative	7,608			7,158			15,548			27,610
Depreciation and amortization	496			453			986			864
Loss (gain) on disposal of long-lived assets, net	—			(56		)	—			870
Total expenses	(1,671		)	(2,183		)	(5,535		)	19,182
Earnings from equity method investments	—			6,220			2,232			5,915
Gain (loss) on issuance of common units by equity method investee	—			5,897			(41		)	5,897
Operating income (loss)	$	(8,504	)	$	4,287		$	(15,154	)	$	(20,110	)

Corporate and Other is not an operating segment. This table is included to permit the reconciliation of segment information to that of the consolidated Company. The amounts reported in the three months and six months ended June 30, 2016 and 2015 above have been recast to include non-operating entities which were previously included in our SemCrude segment and the historical results of our former SemStream segment. SemStream holds our equity method investment in NGL Energy which is no longer material subsequent to the April 2016 sale of our limited partner interest. Earnings from equity method investments and gain (loss) on issuance of common units by equity method investee in the table above relate to our investment in NGL Energy.

Three months ended June 30, 2016 versus three months ended June 30, 2015

General and administrative expense

General and administrative expense increased in the three months ended June 30, 2016, to $7.6 million from $7.2 million in the three months ended June 30, 2015 primarily due to severance and relocation expense associated with the relocation of the Oklahoma City office to Tulsa.

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Six months ended June 30, 2016 versus six months ended June 30, 2015

General and administrative expense

General and administrative expense decreased in the six months ended June 30, 2016, to $15.5 million from $27.6 million in the six months ended June 30, 2015. The decrease is due primarily to $10.0 million of business development expenses related to the Maurepas pipeline and legal settlement expense of $2.4 million which were incurred in the first quarter of 2015.

Liquidity and Capital Resources

Sources and Uses of Cash

Our principal sources of short-term liquidity are cash generated from our operations and borrowings under our revolving credit facilities. The consolidated cash balance on June 30, 2016 was $255.8 million. Of this amount, $33.8 million was held in Canada and may be subject to tax if transferred to the U.S. Potential sources of long-term liquidity include issuances of debt securities and equity securities and the sale of assets. Our primary cash requirements currently are operating expenses, capital expenditures, our quarterly dividends and quarterly distributions to unitholders of our subsidiary, Rose Rock. In general, we expect to fund:

• operating expenses, maintenance capital expenditures and cash dividends and distributions through existing cash and cash from operating activities;

• expansion capital expenditures and any working capital deficits through cash on hand, borrowings under our credit facilities and the issuance of debt securities and equity securities;

• acquisitions through cash on hand, borrowings under our credit facilities and the issuance of debt securities and equity securities; and

• debt principal payments through cash from operating activities and refinancings when the credit facilities become due.

Our ability to meet our financing requirements and fund our planned capital expenditures will depend on our future operating performance and distributions from our equity investments, which will be affected by prevailing economic conditions in our industry. In addition, we are subject to conditions in the debt and equity markets for any issuances of debt securities and equity securities including common units in Rose Rock. There can be no assurance we will be able or willing to access the public or private markets in the future. If we would be unable or unwilling to access those markets, we could be required to restrict future expansion capital expenditures and potential future acquisitions.

We believe our cash from operations and our remaining borrowing capacity allow us to manage our day-to-day cash requirements, distribute our quarterly dividends, distribute the minimum quarterly distribution on Rose Rock's outstanding common units and meet our capital expenditures commitments for the coming year.

Cash Flows

The following table summarizes our changes in unrestricted cash for the periods presented:

	Six Months Ended June 30,
(in thousands)	2016			2015
Statement of cash flow data:
Cash flows provided by (used in):
Operating activities	$	73,915		$	72,957
Investing activities	(55,785		)	(190,792		)
Financing activities	177,611			305,630
Subtotal	195,741			187,795
Effect of exchange rate 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

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Operating Activities

The components of operating cash flows can be summarized as follows:

	Six Months Ended June 30,
(in thousands)	2016			2015
Net income	$	3,683		34,209
Non-cash expenses, net	89,578			56,644
Changes in operating assets and liabilities	(19,346		)	(17,896		)
Net cash flows provided by operating activities	$	73,915		$	72,957

Adjustments to net income for non-cash expenses, net increased $32.9 million to $89.6 million for the six months ended June 30, 2016 from $56.6 million for the six months ended June 30, 2015. This change is primarily a result of:

• $45.2 million increase due to the other-than-temporary impairment recorded on our limited partner investment in NGL Energy, partially offset by a $9.1 million gain on sale of our common limited partner units of NGL Energy in the current year and prior year gains on the sale of a portion of our common limited partner units of NGL Energy, net of related costs;

• $12.6 million due to higher net losses on disposal or impairment primarily due to the impairment of our SemGas segment's goodwill in the current year;

• $5.9 million due to prior year losses on the issuance of common units by NGL Energy;

• $4.3 million due to decreased equity earnings in the current year as compared to the prior year, primarily due to lower equity earnings as a results of the disposal of our common limited partner units of NGL Energy and lower earnings from Glass Mountain; and

• $3.8 million increase due to current year losses on foreign currency transactions as compared to prior year gains.

These increases were offset by decreases due to:

• $31.3 million increase in deferred tax benefit;

• $5.2 million of decreased distributions from equity investments;

• $1.3 million due to net unrealized gains related to our derivative instruments in the current year as compared to prior year net unrealized losses; and

• $1.2 million due to inventory valuation adjustments in the prior year as a result of lower commodity prices.

All other adjustments to net income for non-cash expenses, net for the six months ended June 30, 2016 remained relatively comparable to the six months ended June 30, 2015.

Changes in operating assets and liabilities for the six months ended June 30, 2016 generated a net decrease in operating cash flows of $19.3 million. The decrease to operating cash flow due to the change in operating assets and liabilities was primarily a result of increases of $60.1 millionin accounts receivable, $15.9 millionin inventories, $4.3 millionin receivables from affiliates and $2.2 million in derivatives and margin deposits. These cash outflows were partially offset by cash inflows due to increases of $60.9 millionin accounts payable and accrued liabilities and $4.0 millionin payables to affiliates. Changes in receivables, inventory, payables and accrued liabilities are primarily due to our segments' operating activities and are subject to the timing of purchases and sales and fluctuations in commodity pricing.

Changes in operating assets and liabilities for the six months ended June 30, 2015 generated a net decrease in operating cash flows of $17.9 million. The decrease to operating cash flow due to the change in operating assets and liabilities was primarily a result of increases of $36.1 million in inventories, $3.1 million in other current assets, $2.1 million in other assets, $2.2 million in accounts receivable, $1.4 million in receivables from affiliates and a decrease of $3.8 million in payables to prepetition creditors. These were partially offset by increases of $18.7 million in accounts payable and accrued liabilities, $5.6 million in payables to affiliates and a decrease of $6.8 million in restricted cash. Changes in receivables, inventory, payables and accrued liabilities are primarily due to our Crude segment's operating activities and are subject to the timing of purchases and sales and fluctuations in commodity pricing. Additionally, the increase in inventory is due, in part, to approximately 700 thousand additional barrels in storage compared to the beginning of the period at our Crude segment. This is partially due to a strategic build to capture margins due to forward market crude oil prices being higher than spot market prices. Accounts

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receivable was also impacted by a $9.0 million decrease due to the collection of an accrued receivable at year-end which related to proceeds from the sale of a portion of our common limited partner units of NGL Energy.

Investing Activities

For the six months ended June 30, 2016, we had net cash outflows of $55.8 million from investing activities, due primarily to $126.7 million of capital expenditures and $3.4 million of contributions to equity method investments, offset by investing cash inflows of $60.5 million in proceeds from the sale of our common limited partner units of NGL Energy and $13.8 million of distributions in excess of equity in earnings of affiliates. Capital expenditures primarily related to the Maurepas Pipeline, Rose Rock's pipeline projects, SemGas' Northern Oklahoma expansion projects and SemCAMS' Wapiti expansion. Distributions in excess of equity in earnings of affiliates represent cash distributions from White Cliffs and Glass Mountain in excess of our cumulative equity in earnings and are accounted for as a return of investment.

For the six months ended June 30, 2015, we had net cash outflows of $190.8 million from investing activities, due primarily to $237.0 million of capital expenditures and $23.5 million of contributions to equity method investments, partially offset by investing cash inflows of $56.3 million of net proceeds from the sale of a portion of an equity method investment and $13.1 million of distributions in excess of equity in earnings of affiliates. Capital expenditures primarily related to Rose Rock's pipeline projects, SemGas' Northern Oklahoma expansion projects, the Maurepas Pipeline and SemCAMS' Wapiti expansion. Contributions to equity method investments primarily represent investments to fund the White Cliffs pipeline expansion project. Proceeds from the sale of equity method investment are due to the disposition of a portion of our common limited partner units of NGL Energy. Distributions in excess of equity in earnings of affiliates represent cash distributions from White Cliffs and Glass Mountain in excess of our cumulative equity in earnings and are accounted for as a return of investment.

Financing Activities

For the six months ended June 30, 2016, we had net cash inflows of $177.6 million from financing activities, which related to borrowings on credit facilities of $283.5 million and proceeds from the issuance of common shares, net of offering costs, of $228.5 million, offset by principal payments on credit facilities of $272.9 million, dividends paid of $39.7 million, distributions to non-controlling interests of $21.5 million and $0.9 million to repurchase common stock for payment of statutory taxes due on equity-based compensation. Net borrowings were used primarily for capital expenditures. Proceeds from the issuance of common shares were used to repay borrowings on our credit facility and will be used for future capital expenditures and general corporate purposes.

For the six months ended June 30, 2015, we had net cash inflows of $305.6 million from financing activities, which related to borrowings on long-term debt of $802.2 million and $89.1 million in proceeds from the issuance of Rose Rock limited partner common units, offset by principal payments on credit facilities of $525.0 million, dividends paid of $31.5 million, distributions to non-controlling interests of $19.3 million, $6.3 million in debt issuance costs and $4.3 million to repurchase common stock for payment of statutory taxes due on equity-based compensation. Net borrowings were used primarily for capital expenditures and contributions to equity method investments.

Long-term Debt

SemGroup Senior Unsecured Notes

At June 30, 2016, we had $300 million of 7.5% senior unsecured notes due 2021 (the "Notes") outstanding.

SemGroup Revolving Credit Facility

At June 30, 2016, we had no cash borrowings outstanding under our $500 million revolving credit facility. We had $6.0 million in outstanding letters of credit on that date. The maximum letter of credit capacity under this facility is $250 million. The facility can be increased by up to $300 million. The credit agreement expires on December 11, 2018.

At June 30, 2016, we had available borrowing capacity of $494.0 million under this facility.

Rose Rock Senior Unsecured Notes

At June 30, 2016, Rose Rock had outstanding $400 million and $350 million of 5.625% senior unsecured notes due 2022 and 2023, respectively, (the "Rose Rock Notes"). The Rose Rock Notes are guaranteed by all of Rose Rock's existing subsidiaries other than Rose Rock Finance Corp.

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Rose Rock Revolving Credit Facility

At June 30, 2016, Rose Rock had $41.0 million of cash borrowings outstanding under its $585 million revolving credit facility. There were $37.7 million in outstanding letters of credit under this facility. The maximum letter of credit capacity under this facility is $150 million. The facility can be increased by up to $200 million. The credit agreement expires on September 20, 2018.

At June 30, 2016, Rose Rock had available borrowing capacity of $506.3 million under this facility.

SemMexico Credit Facilities

At June 30, 2016, SemMexico had no amounts outstanding on its $100 million Mexican pesos (U.S. $5.4 million at the June 30, 2016 exchange rate) credit facility which matures in May 2018. 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).

Shelf Registration Statements

We have access to a universal shelf registration statement which provides us with the ability to offer and sell an unlimited amount of debt and equity securities, subject to market conditions and our capital needs. This shelf registration statement expires in March 2019. 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.

Rose Rock has an effective shelf registration statement for the offer and sale, from time to time, of common units representing limited partner interests in Rose Rock having an aggregate offering price of up to $150 million. On May 12, 2015, Rose Rock entered into an Equity Distribution Agreement under which Rose Rock is able to make such sales over a period of time and, from time to time, in transactions at prices which are market prices prevailing at the time of sale, prices related to market price or at negotiated prices. The counterparties to the Equity Distribution Agreement may act as sales agents for the common units or may purchase common units for their own accounts as principals. To date, no such sales have been made.

Capital Requirements

The midstream energy business can be capital intensive, requiring significant investment for the maintenance of existing assets or acquisition or development of new systems and facilities. We categorize our capital expenditures as either:

• expansion capital expenditures, which are cash expenditures incurred for acquisitions or capital improvements that we expect will increase our operating income or operating capacity over the long-term; or

• maintenance capital expenditures, which are cash expenditures (including expenditures for the addition or improvement to, or the replacement of, our capital assets or for the acquisition of existing, or the construction or development of new, capital assets) made to maintain our long-term operating income or operating capacity.

Projected capital expenditures for 2016 are estimated at $400 million in expansion projects, including capital contributions to affiliates for funding growth projects and acquisitions, and $55 million in maintenance projects. These estimates may change as future events unfold. See "Cautionary Note Regarding Forward-Looking Statements." During the six months endedJune 30, 2016, we spent $126.7 million (cash basis) on capital projects and $3.4 million in capital contributions to affiliates primarily for funding growth projects.

In addition to our budgeted capital program, we anticipate that we will continue to make significant expansion capital expenditures in the future. Consequently, our ability to develop and maintain sources of funds to meet our capital requirements is critical to our ability to meet our growth objectives. We expect that our future expansion capital expenditures will be funded by cash from operations, borrowings under our credit facilities and the issuance of debt and equity securities.

SemGroup Dividends

The table below shows dividends declared and/or paid by SemGroup during 2015 and 2016.

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Quarter Ended	Record Date	Payment Date	Dividend Per Share
March 31, 2015	March 9, 2015	March 20, 2015	$0.34
June 30, 2015	May 18, 2015	May 29, 2015	$0.38
September 30, 2015	August 17, 2015	August 25, 2015	$0.42
December 31, 2015	November 16, 2015	November 24, 2015	$0.45
March 31, 2016	March 7, 2016	March 17, 2016	$0.45
June 30, 2016	May 16, 2016	May 26, 2016	$0.45
September 30, 2016	August 15, 2016	August 25, 2016	$0.45

Rose Rock Distributions

The table below shows cash distributions declared and/or paid by Rose Rock during 2015 and 2016.

Quarter Ended	Record Date	Payment Date	Distribution Per Unit
December 31, 2014	February 3, 2015	February 14, 2015	$0.6200
March 31, 2015	May 5, 2015	May 15, 2015	$0.6350
June 30, 2015	August 4, 2015	August 14, 2015	$0.6500
September 30, 2015	November 3, 2015	November 13, 2015	$0.6600
December 31, 2015	February 2, 2016	February 12, 2016	$0.6600
March 31, 2016	May 3, 2016	May 13, 2016	$0.6600
June 30, 2016	August 2, 2016	August 12, 2016	$0.6600

Credit Risk

We are subject to risks of loss resulting from nonpayment or nonperformance by our customers. We examine the creditworthiness of third-party customers to whom we extend credit and manage our exposure to credit risk through credit analysis, credit approval, credit limits and monitoring procedures, and for certain transactions, we may request letters of credit, prepayments or guarantees.

Customer Concentration

Shell Trading (US) Company, a customer of our Crude Supply and Logistics segment, accounted for more than 10% of our consolidated revenue for the three months ended June 30, 2016, at approximately 30%. Shell Trading (US) Company, a customer of our Crude Supply and Logistics segment, accounted for more than 10% of our consolidated revenue for the six months ended June 30, 2016, at approximately 33%. Although we have contracts with customers of varying durations, if one or more of our major customers were to default on their contract, or if we were unable to renew our contract with one or more of these customers on favorable terms, we might not be able to replace any of these customers in a timely fashion, on favorable terms or at all. In any of these situations, our revenues and our ability to pay cash dividends to our stockholders may be adversely affected. We expect our exposure to risk of non-payment or non-performance to continue as long as we remain substantially dependent on a relatively small number of customers for a substantial portion of our Adjusted gross margin.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements as defined by Item 303 of Regulation S-K.

Commitments

There have been no material changes to our contractual obligations outside the ordinary course of our business from those previously disclosed in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2015, although the value of product purchase commitments is less at June 30, 2016 than it was at December 31, 2015.

We routinely enter into agreements to purchase and sell petroleum products at specified future dates. We establish a margin for these purchases by entering into various types of physical and financial sales and exchange transactions through which we seek to maintain a position that is substantially balanced between purchases on the one hand and sales and future

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delivery obligations on the other. 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 (volumes and dollars 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. This obligation continues through June 2023. At June 30, 2016, the amount of future obligation is approximately $61.5 million. In addition, our SemGas segment 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. During the three months and six months ended June 30, 2016, 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.

Critical Accounting Policies and Estimates

For disclosure regarding our critical accounting policies and estimates, see the discussion under the caption "Critical Accounting Policies and Estimates" in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2015.

Recent Accounting Pronouncements

See Note 1 to our condensed consolidated financial statements.

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Item 3. Quantitative and Qualitative Disclosures about Market Risk

This discussion on market risks represents an estimate of possible changes in future earnings that would occur assuming hypothetical future movements in commodity prices, interest rates and currency exchange rates. Our views on market risk are not necessarily indicative of actual results that may occur, and do not represent the maximum possible gains and losses that may occur since actual gains and losses will differ from those estimated based on actual fluctuations in commodity prices, interest rates, currency exchange rates and the timing of transactions.

We are exposed to various market risks, including changes in (i) petroleum prices, particularly crude oil, natural gas and natural gas liquids, (ii) interest rates and (iii) currency exchange rates. We may use from time-to-time various derivative instruments to manage such exposure. Our risk management policies and procedures are designed to monitor physical and financial commodity positions and the resulting outright commodity price risk as well as basis risk resulting from differences in commodity grades, purchase and sales locations and purchase and sale timing. We have a risk management function that has responsibility and authority for our Comprehensive Risk Management Policy, which governs our enterprise-wide risks, including the market risks discussed in this item. Subject to our Comprehensive Risk Management Policy, our finance and treasury function has responsibility and authority for managing exposure to interest rates and currency exchange rates. To manage the risks discussed above, we engage in price risk management activities.

Commodity Price Risk

The table below outlines the range of NYMEX prompt month daily settle prices for crude oil and natural gas futures, and the range of daily propane spot prices provided by an independent, third-party broker for the three months and six months ended June 30, 2016 and June 30, 2015 and the year ended December 31, 2015.

	Light Sweet Crude Oil Futures (Barrel)	Mont Belvieu (Non-LDH) Spot Propane (Gallon)	Henry Hub Natural Gas Futures (MMBtu)
Three Months Ended June 30, 2016
High	$51.23	$0.57	$2.92
Low	$35.70	$0.42	$1.90
High/Low Differential	$15.53	$0.15	$1.02
Three Months Ended June 30, 2015
High	$61.43	$0.58	$3.02
Low	$49.14	$0.32	$2.49
High/Low Differential	$12.29	$0.26	$0.53
Six Months Ended June 30, 2016
High	$51.23	$0.57	$2.92
Low	$26.21	$0.29	$1.64
High/Low Differential	$25.02	$0.28	$1.28
Six Months Ended June 30, 2015
High	$61.43	$0.64	$3.23
Low	$43.46	$0.32	$2.49
High/Low Differential	$17.97	$0.32	$0.74
Year Ended December 31, 2015
High	$61.43	$0.63	$3.23
Low	$34.73	$0.31	$1.75
High/Low Differential	$26.70	$0.32	$1.48

Revenue from our asset-based activities is dependent on throughput volume, tariff rates, the level of fees generated from our pipeline systems, capacity leased to third parties, capacity that we use for our own operational or marketing activities and the level of other fees generated at our terminalling and storage facilities. Profit from our marketing activities is dependent on

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our ability to sell petroleum products at prices in excess of our aggregate cost. Margins may be affected during transitional periods between a backwardated market (when the prices for future deliveries are lower than the current prices) and a contango market (when the prices for future deliveries are higher than the current prices). Our petroleum product marketing activities within each of our segments are generally not directly affected by the absolute level of petroleum product prices, but are affected by overall levels of supply and demand for petroleum products and relative fluctuations in market-related indices at various locations.

However, the SemGas segment has exposure to commodity price risk because of the nature of certain contracts for which our fee is based on a percentage of proceeds or index related to the prices of natural gas, natural gas liquids and condensate. Given current volumes, liquid recoveries and contract terms, we estimate the following sensitivities over the next twelve months:

• A 10% increase in the price of natural gas and natural gas liquids results in approximately a $2.5 million increase to Adjusted gross margin.

• A 10% decrease in those prices would have the opposite effect.

This sensitivity may be impacted by changes in contract mix, change in production or other factors which are outside of our control.

Additionally, based on our open derivative contracts at June 30, 2016, an increase in the applicable market price or prices for each derivative contract would result in a decrease in the contribution from these derivatives to our crude oil sales revenues. A decrease in the applicable market price or prices for each derivative contract would result in an increase in the contribution from these derivatives to our crude oil sales revenues. However, the increases or decreases in crude oil sales revenues we recognize from our open derivative contracts are substantially offset by higher or lower crude oil sales revenues when the physical sale of the product occurs. These contracts may be for the purchase or sale of crude oil or in markets different from the physical markets in which we are attempting to hedge our exposure, or may have timing differences relative to the physical markets. As a result of these factors, our hedges may not eliminate all price risks.

The notional volumes and fair value of our commodity derivatives open positions as well as the change in fair value that would be expected from a 10% market price increase or decrease is shown in the table below (in thousands):

	Notional Volume (Barrels)	Fair Value			Effect of 10% Price Increase			Effect of 10% Price Decrease		Settlement Date
Crude oil:
Futures	942 short	$	(268	)	$	(4,553	)	$	4,553	Various through December 2016

Margin deposits or other credit support, including letters of credit, are generally required on derivative instruments used to manage our price exposure. As commodity prices increase or decrease, the fair value of our derivative instruments changes, thereby increasing or decreasing our margin deposit or other credit support requirements. Although a component of our risk-management strategy is intended to manage the margin and other credit support requirements on our derivative instruments, volatile spot and forward commodity prices, or an expectation of increased commodity price volatility, could increase the cash needed to manage our commodity price exposure and thereby increase our liquidity requirements. This may limit amounts available to us through borrowing, decrease the volume of petroleum products we purchase and sell or limit our commodity price management activities.

Interest Rate Risk

We use variable rate debt and are exposed to market risk due to the floating interest rates on our credit facilities. Therefore, from time-to-time we may use interest rate derivatives to manage interest obligations on specific debt issuances. Our variable rate debt bears interest at LIBOR or prime, subject to certain floors, plus the applicable margin. At June 30, 2016, an increase in these base rates of 1%, above the base rate floors, would increase our interest expense by $0.2 million and $0.4 million for the three months and six months ended June 30, 2016, respectively.

The average interest rates presented below are based upon rates in effect at June 30, 2016 and December 31, 2015. The carrying value of the variable rate instruments in our credit facilities approximate fair value primarily because our rates fluctuate with prevailing market rates.

Page 65

The following table summarizes our debt obligations:

Liabilities	June 30, 2016	December 31, 2015
Short-term debt - variable rate	$0.0 million	$0.0 million
Average interest rate	0.00%	0.00%
Long-term debt - variable rate	$41.0 million	$30.0 million
Average interest rate	5.25%	4.50%
Long-term debt - fixed rate	$300.0 million	$300.0 million
Fixed interest rate	7.50%	7.50%
Long-term debt - fixed rate	$750.0 million	$750.0 million
Fixed interest rate	5.625%	5.625%

Currency Exchange Risk

The cash flows relating to our U.K., Canada and Mexico operations are based on the U.S. dollar equivalent of such amounts measured in British pounds, Canadian dollars and Mexican pesos. Assets and liabilities of our U.K., Canadian and Mexican subsidiaries are translated to U.S. dollars using the applicable exchange rate as of the end of a reporting period. Revenue, expenses and cash flows are translated using the average exchange rate during the reporting period.

A 10% change in the average exchange rate during the three months and six months ended June 30, 2016 would change operating income by $1.3 million and $2.8 million, respectively.

Page 66

Item 4. Controls and Procedures

Disclosure Controls and Procedures

Our Chief Executive Officer and Chief Financial Officer have concluded that the design and operation of our disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act), are effective as of June 30, 2016. This conclusion is based on an evaluation conducted under the supervision and participation of our Chief Executive Officer and Chief Financial Officer along with our management. Disclosure controls and procedures are those controls and procedures designed to ensure that information required to be disclosed in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the fiscal quarter ended June 30, 2016, that have materially affected, or that are reasonably likely to materially affect, our internal control over financial reporting.

Page 67

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

For information regarding legal proceedings, see the discussion under the captions "Bankruptcy matters," "Dimmit County, TX claims," "Environmental" and "Other matters," in Note 10 of our unaudited condensed consolidated financial statements in Part I, Item 1 of this Quarterly Report on Form 10-Q, which information is incorporated by reference into this Item 1.

Item 1A. Risk Factors

Except as set forth below, there have been no material changes to the risk factors involving us from those previously disclosed in Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2015.

Our pending transaction with Rose Rock may not close when expected, or at all.

The consummation of our merger with Rose Rock is subject to the approval of the issuance of shares of our Class A common stock pursuant to the merger agreement by our stockholders and the satisfaction of other customary closing conditions. If these conditions to closing are not satisfied or waived, if waivable, the merger with Rose Rock will not be consummated. Further, the consummation of the merger requires a waiver or amendment of certain provisions of our credit agreement and Rose Rock’s credit agreement. Although we expect to amend and consolidate the credit agreements to permit the merger, if the lenders do not consent and we cannot refinance the credit agreements, then we will not be able to consummate the merger. Additionally, there is no assurance that we will complete the merger in the time frame that we anticipate or under the terms set forth in the merger agreement, or at all.

If our pending transaction with Rose Rock is consummated, we may not realize the benefits we expect.

We entered into the merger agreement with Rose Rock because we believe that the merger will be, among other things, immediately accretive to SemGroup stockholders, simplify our corporate capital structure and improve our cost of capital and our capital market access and provide increased financial flexibility for execution of our strategic growth plan. However, our assessments and expectations regarding these anticipated benefits of the merger may prove to be incorrect. Accordingly, there can be no assurance we will realize the anticipated benefits of our merger with Rose Rock.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The following table provides information about purchases of our common stock by us during the quarter ended June 30, 2016:

	Total Number of Shares Purchased (1)	Weighted Average Price Paid per Share (2)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares That May Yet Be Purchased Under the Plans or Programs
April 1, 2016 - April 30, 2016	2,982	$	21.05	—	—
May 1, 2016 - May 31, 2016	1,028	28.90		—	—
June 1, 2016 - June 30, 2016	—	—		—	—
Total	4,010	$	23.06	—	—

(1	)	Represents shares of common stock withheld from certain of our employees for payment of taxes associated with the vesting of restricted stock awards.
(2	)	The price paid per common share represents the closing price as posted on the New York Stock Exchange on the day that the shares were purchased.

Item 3. Defaults Upon Senior Securities

None

Item 4. Mine Safety Disclosures

Not applicable

Page 68

Item 5. Other Information

None

Item 6. Exhibits

The following exhibits are filed or furnished as part of this Quarterly Report on Form 10-Q:

Exhibit Number	Description
2.1	Agreement and Plan of Merger dated as of May 30, 2016, by and among SemGroup Corporation, PBMS, LLC, Rose Rock Midstream, L.P. and Rose Rock Midstream GP, LLC, (filed as Exhibit 2.1 to our current report on Form 8-K dated May 30, 2016, filed May 31, 2016, and incorporated herein by reference.)
3.1	Amended and Restated Bylaws, dated as of May 17, 2016, of SemGroup Corporation (filed as Exhibit 3 to our current report on Form 8-K dated May 17, 2016, filed May 19, 2016, and incorporated herein by reference).
10.1	SemGroup Corporation Board of Directors Compensation Plan effective June 1, 2016.
10.2	SemGroup Corporation Equity Incentive Plan, as amended and restated (filed as Annex A to our Proxy Statement for our 2016 Annual Meeting of Stockholders, filed April 13, 2016, and incorporated herein by reference).
31.1	Rule 13a-14(a)/15d-14(a) Certification of Carlin G. Conner, Chief Executive Officer.
31.2	Rule 13a-14(a)/15d-14(a) Certification of Robert N. Fitzgerald, Chief Financial Officer.
32.1	Section 1350 Certification of Carlin G. Conner, Chief Executive Officer.
32.2	Section 1350 Certification of Robert N. Fitzgerald, Chief Financial Officer.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.

Page 69

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: August 5, 2016	SEMGROUP CORPORATION
	By:	/s/     Robert N. Fitzgerald
		Robert N. Fitzgerald
		Senior Vice President and
		Chief Financial Officer

Page 70

EXHIBIT INDEX

The following exhibits are filed or furnished as part of this Quarterly Report on Form 10-Q:

Exhibit Number	Description
2.1	Agreement and Plan of Merger dated as of May 30, 2016, by and among SemGroup Corporation, PBMS, LLC, Rose Rock Midstream, L.P. and Rose Rock Midstream GP, LLC, (filed as Exhibit 2.1 to our current report on Form 8-K dated May 30, 2016, filed May 31, 2016, and incorporated herein by reference.)
3.1	Amended and Restated Bylaws, dated as of May 17, 2016, of SemGroup Corporation (filed as Exhibit 3 to our current report on Form 8-K dated May 17, 2016, filed May 19, 2016, and incorporated herein by reference).
10.1	SemGroup Corporation Board of Directors Compensation Plan effective June 1, 2016.
10.2	SemGroup Corporation Equity Incentive Plan, as amended and restated (filed as Annex A to our Proxy Statement for our 2016 Annual Meeting of Stockholders, filed April 13, 2016, and incorporated herein by reference).
31.1	Rule 13a-14(a)/15d-14(a) Certification of Carlin G. Conner, Chief Executive Officer.
31.2	Rule 13a-14(a)/15d-14(a) Certification of Robert N. Fitzgerald, Chief Financial Officer.
32.1	Section 1350 Certification of Carlin G. Conner, Chief Executive Officer.
32.2	Section 1350 Certification of Robert N. Fitzgerald, Chief Financial Officer.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.

Page 71

EX-10.1

EXHIBIT 10.1

SEMGROUP CORPORATION

Board of Directors

Compensation Plan

Effective June 1, 2016

Total annual compensation for the non-executive Board members of SemGroup Corporation will be paid both in a retainer (either in cash or in equity, or a combination thereof) and in an equity grant of SemGroup Corporation.

	Total Compensation 1	Annual  Retainer 2, 3, 4	Committee Meeting Fee 5	Annual Equity Grant 4
Non-Executive Chairman of the Board	$309,000	$137,000		$172,000
Chairman - Audit Committee	$219,000	$99,500	$2,000	$119,500
Members - Audit Committee	$194,000	$87,000	$2,000	$107,000
Chairman - Nominating/Governance Committee	$209,000	$94,500	$2,000	$114,500
Chairman - Compensation Committee	$214,000	$97,000	$2,000	$117,000
Members - Nominating/Governance Committee	$194,000	$87,000	$2,000	$107,000
Members - Compensation Committee	$194,000	$87,000	$2,000	$107,000
Members - Board Only	$194,000	$87,000		$107,000

A. Board members will receive the Annual Equity Grant as restricted stock which shall fully vest on the first anniversary date of the grant.

B. Board members must retain 100% of all stock awarded under this plan until a minimum ownership level of vested shares equal in value to 4x’s the Annual Retainer for Members - Board Only as set forth above has been achieved; provided, however, (i) that Board members will be able to sell shares to cover tax liability associated with fully-vested or vesting of restricted shares and (ii) that vested shares can be transferred: (1) to his or her revocable grantor trust in which such Director is the sole primary beneficiary; (2) to a trust maintained for the benefit of the spouse or minor child of the Director of which the Director serves as trustee; and (3) to the spouse of the director to be held in common ownership with such Director.

C. Each Board member shall receive the highest Total Compensation he or she is entitled to pursuant to the above table. No Board member shall be entitled to compensation from more than one row of the table set forth above.

D. The number of shares of restricted stock received shall be determined by dividing the dollar amount of the grant by the value of a share of common stock on the date the grant is made.

E. Board members will receive in June of each plan year, which shall commence on June 1 of each year, their Annual Retainer and Annual Equity Grant. The Annual Retainer and Annual Equity Grant shall be pro-rated for any Director whose service commences after June 1 of a plan year.

¹  Total compensation is the sum of the Annual Retainer and Annual Equity Grant paid on an annual basis. This does not include Committee Meeting Fees.

²  Board members may elect, on or prior to December 31 of the calendar year preceding the plan year, to receive the Annual Retainer in either cash, fully-vested restricted stock, or a combination thereof. If a Board member does not make such an election, the entire amount of the Annual Retainer will be paid in cash.

³  The Annual Retainer to be paid in cash can be voluntarily deferred in increments of 5% subject to compliance with the SemGroup Corporation Non-executive Directors’ Compensation Deferral Program, which is attached as Attachment A hereto and hereby incorporated herein by reference.

⁴  All equity grants will be made under the SemGroup Corporation Equity Incentive Plan.

⁵  Committee Meeting Fees are paid only to members of the committee for their attendance at each meeting of their respective committees and not to other Board members who may attend the meeting voluntarily; provided, however, that if the Chairman of the Board attends a committee meeting for the purpose of establishing a quorum and if a non-member of a committee attends at the specific request or requirement of the Chairman of that Committee, that director will be entitled to be paid a Committee Meeting Fee.

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Carlin G. Conner, certify that:

1. I have reviewed this quarterly report on Form 10-Q of SemGroup Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 5, 2016

/s/ Carlin G. Conner

Carlin G. Conner

President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Robert N. Fitzgerald, certify that:

1. I have reviewed this quarterly report on Form 10-Q of SemGroup Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 5, 2016

/s/ Robert N. Fitzgerald

Robert N. Fitzgerald

Senior Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of SemGroup Corporation (the “Company”) on Form 10-Q for the quarter ended June 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Carlin G. Conner, President and Chief Executive Officer of the Company, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 5, 2016

/s/ Carlin G. Conner

Carlin G. Conner

President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of SemGroup Corporation (the “Company”) on Form 10-Q for the quarter ended June 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert N. Fitzgerald, Senior Vice President and Chief Financial Officer of the Company, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 5, 2016

/s/ Robert N. Fitzgerald

Robert N. Fitzgerald

Senior Vice President and

Chief Financial Officer

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 31, 2016
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
Common Class A [Member]
Entity Common Stock, Shares Outstanding		52,813,816
Class B
Entity Common Stock, Shares Outstanding		0

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	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

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	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

XML

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	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

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	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

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Overview

6 Months Ended

Jun. 30, 2016

Overview [Abstract]

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.

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Rose Rock Midstream, L.P.

6 Months Ended

Jun. 30, 2016

Investments in and Advances to Affiliates [Line Items]

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.

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Equity Method Investments

6 Months Ended

Jun. 30, 2016

Equity Method Investments and Joint Ventures [Abstract]

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 endedJune 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 endedJune 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 endedJune 30, 2016, we contributed $0.3 million to Glass Mountain related to capital projects.

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Impairments

6 Months Ended

Jun. 30, 2016

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.

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Segments

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

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.

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Inventories

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

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.

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Financial Instruments

6 Months Ended

Jun. 30, 2016

Financial Instruments And Fair Value Disclosures [Abstract]

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.

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Income Taxes

6 Months Ended

Jun. 30, 2016

Income Tax Disclosure [Abstract]

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.

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Long-Term Debt

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

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.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

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.

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Equity

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Note [Abstract]

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

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Earnings Per Share

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

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.

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Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2016

Supplemental Cash Flow Information [Abstract]

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.

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Related Party Transactions

6 Months Ended

Jun. 30, 2016

Related Party Transactions [Abstract]

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).

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Condensed Consolidating Guarantor Financial Statements (Notes)

6 Months Ended

Jun. 30, 2016

Condensed Consolidating Guarantor Financial Statements [Abstract]

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

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Overview (Policies)

6 Months Ended

Jun. 30, 2016

Overview [Abstract]

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.

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Financial Instruments (Policies)

6 Months Ended

Jun. 30, 2016

Financial Instruments And Fair Value Disclosures [Abstract]

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.

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Rose Rock Midstream, L.P. (Tables)

6 Months Ended

Jun. 30, 2016

Investments in and Advances to Affiliates [Line Items]

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.

Rose Rock Midstream L P [Member]

Investments in and Advances to Affiliates [Line Items]

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

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Equity Method Investments (Tables)

6 Months Ended

Jun. 30, 2016

Schedule of Equity Method Investments [Line Items]

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

White Cliffs Pipeline, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

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

NGL Energy Partners LP [Member]

Schedule of Equity Method Investments [Line Items]

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

Glass Mountain Pipeline LLC [Member]

Schedule of Equity Method Investments [Line Items]

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

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Segments (Tables)

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

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.

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Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

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

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Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2016

Derivative [Line Items]

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	)

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Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2016

Debt Instrument [Line Items]

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

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2016

Long-term Purchase Commitment [Line Items]

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

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Equity (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Note [Abstract]

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

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

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

XML

Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2016

Supplemental Cash Flow Information [Abstract]

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	)

XML

Related Party Transactions (Tables)

6 Months Ended

Jun. 30, 2016

Related Party Transactions [Abstract]

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

XML

Condensed Consolidating Guarantor Financial Statements (Tables)

6 Months Ended

Jun. 30, 2016

Condensed Consolidating Guarantor Financial Statements [Abstract]

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

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Overview (Details) $ in Millions	Dec. 31, 2015 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized Debt Issuance Expense	$ 16.8

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Rose Rock Midstream, L.P. -Distributions (Details) - USD ($)									6 Months Ended
		Aug. 12, 2016	May 13, 2016	Feb. 12, 2016	Nov. 13, 2015	Aug. 14, 2015	May 15, 2015	Feb. 13, 2015	Jun. 30, 2016
Distribution of Q4 2014 earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution per unit								$ 0.6200
Total distributions to partners								$ 24,269,000
Distribution of Q1 2015 earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution per unit							$ 0.6350
Total distributions to partners							$ 28,379,000
Distribution of Q2 2015 earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution per unit						$ 0.6500
Total distributions to partners						$ 29,483,000
Distribution of Q3 2015 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution per unit					$ 0.6600
Total distributions to partners					$ 30,221,000
Distribution of Q4 2015 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution per unit				$ 0.6600
Total distributions to partners				$ 30,224,000
Distribution of Q1 2016 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution per unit			$ 0.6600
Total distributions to partners			$ 30,251,000
Distribution of Q2 2016 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution Made to Limited Partner, Distribution Date									Aug. 12, 2016
Distribution Made to Limited Partner, Date of Record									Aug. 02, 2016
Subsequent Event [Member] | Distribution of Q2 2016 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Total distributions to partners		$ 30,257,000
Distribution Made to Limited Partner, Cash Distributions Declared	[1]	0.6600
Parent [Member] | General Partner [Member] | Distribution of Q4 2014 earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions								485,000
Incentive distributions								3,487,000
Parent [Member] | General Partner [Member] | Distribution of Q1 2015 earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions							568,000
Incentive distributions							4,450,000
Parent [Member] | General Partner [Member] | Distribution of Q2 2015 earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions						590,000
Incentive distributions						4,979,000
Parent [Member] | General Partner [Member] | Distribution of Q3 2015 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions					604,000
Incentive distributions					5,333,000
Parent [Member] | General Partner [Member] | Distribution of Q4 2015 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions				604,000
Incentive distributions				5,333,000
Parent [Member] | General Partner [Member] | Distribution of Q1 2016 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions			605,000
Incentive distributions			5,338,000
Parent [Member] | General Partner [Member] | Subsequent Event [Member] | Distribution of Q2 2016 Earnings [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
General partner distributions		605,000
Incentive distributions		5,339,000
Parent [Member] | Limited Partner [Member] | Distribution of Q4 2014 earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions								6,551,000
Parent [Member] | Limited Partner [Member] | Distribution of Q4 2014 earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions								5,202,000
Parent [Member] | Limited Partner [Member] | Distribution of Q1 2015 earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions							13,148,000
Parent [Member] | Limited Partner [Member] | Distribution of Q1 2015 earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions							0
Parent [Member] | Limited Partner [Member] | Distribution of Q2 2015 earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions						13,458,000
Parent [Member] | Limited Partner [Member] | Distribution of Q2 2015 earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions						0
Parent [Member] | Limited Partner [Member] | Distribution of Q3 2015 Earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions					13,665,000
Parent [Member] | Limited Partner [Member] | Distribution of Q3 2015 Earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions					0
Parent [Member] | Limited Partner [Member] | Distribution of Q4 2015 Earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions				13,665,000
Parent [Member] | Limited Partner [Member] | Distribution of Q4 2015 Earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions				0
Parent [Member] | Limited Partner [Member] | Distribution of Q1 2016 Earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions			13,665,000
Parent [Member] | Limited Partner [Member] | Distribution of Q1 2016 Earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions			0
Parent [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 Made to Limited Partner, Cash Distributions Declared		13,665,000
Parent [Member] | Limited Partner [Member] | Subsequent Event [Member] | Distribution of Q2 2016 Earnings [Member] | Subordinated Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared		0
Noncontrolling Interest [Member] | Limited Partner [Member] | Distribution of Q4 2014 earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions								$ 8,544,000
Noncontrolling Interest [Member] | Limited Partner [Member] | Distribution of Q1 2015 earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions							$ 10,213,000
Noncontrolling Interest [Member] | Limited Partner [Member] | Distribution of Q2 2015 earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions						$ 10,456,000
Noncontrolling Interest [Member] | Limited Partner [Member] | Distribution of Q3 2015 Earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions					$ 10,619,000
Noncontrolling Interest [Member] | Limited Partner [Member] | Distribution of Q4 2015 Earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions				$ 10,622,000
Noncontrolling Interest [Member] | Limited Partner [Member] | Distribution of Q1 2016 Earnings [Member] | Common Units [Member]
Distributions to Limited or General Partners and Incentive Distributions [Abstract]
Limited partner distributions			$ 10,643,000
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 Made to Limited Partner, Cash Distributions Declared		$ 10,648,000

[1] *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.

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Rose Rock Midstream, L.P. - Summarized balance sheet information (Details) - USD ($) $ in Thousands	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

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Rose Rock Midstream, L.P. - Summarized income statement information (Details) - USD ($) $ in Thousands	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

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Rose Rock Midstream, L.P. (Details Textual)	6 Months Ended
	Jun. 30, 2016 USD ($) $ / Unit	May 30, 2016 USD ($)
Limited Partner [Member] | Rose Rock Midstream, L.P. [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Limited partner ownership interest	55.10%
General Partner [Member] | Rose Rock Midstream, L.P. [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
General partner ownership interest	2.00%
First Target Distribution [Member] | Minimum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Partners' minimum quarterly distribution per unit | $ / Unit	0.3625
SemGroup 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
Rose Rock merger agreement [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Maximum reimbursable transaction related costs	$ 3,800,000
Merger termination contingent fee	$ 15,500,000

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Equity Method Investments - Investment balances (Details) - USD ($) $ in Thousands	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

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Equity Method Investments - Equity earnings, by investment (Details) - USD ($) $ in Thousands		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	[1]	0	6,220	2,232	5,915
Glass Mountain Pipeline LLC [Member]
Schedule of Equity Method Investments [Line Items]
Earnings from equity method investments		$ 650	$ 2,138	$ 1,709	$ 3,912

[1] (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).

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Equity Method Investments - Distributions received, by investment (Details) - USD ($) $ in Thousands	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

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Equity Method Investments - Summarized financial information - White Cliffs (Details) - White Cliffs Pipeline, L.L.C. [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
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

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Equity Method Investments - Summarized financial information - NGL Energy (Details) - NGL Energy Partners LP [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
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

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Equity Method Investments - Summarized financial information - Glass Mountain (Details) - Glass Mountain Pipeline LLC [Member] - USD ($) $ in Thousands	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]
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

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Equity Method Investments (Details Textual) $ / shares in Units, bbl in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) bbl	Jun. 30, 2015 USD ($) shares	Apr. 27, 2016 $ / shares	Dec. 31, 2015 $ / shares
Schedule of Equity Method Investments [Line Items]
Gain (loss) on issuance of common units by equity method investee	$ 0	$ 5,897	$ (41)	$ 5,897
General and administrative	20,775	22,917	41,835	55,227
Loss (gain) on sale or impairment of equity method investment	(9,120)	(6,623)	30,644	(14,517)
Net proceeds from sale of common units of equity method investee			60,483	56,318
White Cliffs Pipeline, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
General and administrative	400	400	900	700
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	(41)	$ 5,900
Units of equity investee divested | shares				1,999,533
Closing price per common unit | $ / shares					$ 13.00	$ 11.04
Loss (gain) on sale or impairment of equity method investment			$ 9,100
Net proceeds from sale of common units of equity method investee				$ 56,300
Transaction related costs				500
Gain on sale of common units of equity method investee		$ 6,600		$ 14,500
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
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
Incremental capacity expected to be added | bbl			65

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Impairment (Details) - USD ($) $ / shares in Units, $ in Millions	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

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Segments (Details) - USD ($) $ in Thousands		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	[1]	18,161	19,983	43,579		44,507
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	[1]	9,000	7,981	18,904		15,866
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	[1]	12,304	17,671	11,312		32,551
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	[1]	2,002	1,992	4,661		2,853
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	[1]	2,024	5,056	4,342		10,179
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	[1]	9,371	7,963	18,958		16,365
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	[1]	10,069	10,978	19,162		16,159
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		496	453	986		864
Earnings from equity method investments	[2]	0	12,117	2,191		11,812
Total assets	[3]	282,826		282,826				196,347
Income tax expense (benefit)		4,286	13,314	(18,752)		16,884
Segment profit	[3]	(8,008)	4,740	(14,168)		(19,132)
Equity method investments	[3]	18,977		18,977				112,787
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)

[1] (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] (1) Includes historical earnings from equity method investment 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.

[3] (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.

XML

Inventories (Details) - USD ($) $ in Thousands	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

XML

Financial Instruments - Fair value of financial assets and liabilties (Details) - Commodity Derivatives [Member] - Fair Value, Inputs, Level 1 [Member] - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Fair Value of Financial Assets and Liabilities
Derivative Asset, Fair Value, Gross Asset		$ 1,160	$ 131
Derivative Asset, Fair Value, Gross Liability	[1]	(1,160)	(131)
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]	(1,160)	(131)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		$ 268	$ 339

[1] *Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.

XML

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

XML

Financial Instruments - Notional amounts (Details) - bbl bbl in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Sales [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	5,890	7,721	16,310	13,452
Purchases [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	5,743	7,508	16,253	13,413

XML

Financial Instruments - Fair value of commodity derivative assets and liabilities (Details) - Commodity Contract [Member] - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	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

XML

Financial Instruments - Realized and unrealized gains and losses (Details) - USD ($) $ in Thousands	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)

XML

Financial Instruments (Details Textual)	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($) Customer	Jun. 30, 2016 USD ($) Customer	Dec. 31, 2015 USD ($)
Offsetting Assets [Line Items]
Margin Deposit Assets	$ 5,100,000	$ 5,100,000	$ 2,900,000
Commodity Contract [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 4,800,000	$ 4,800,000	$ 2,600,000
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage	30.00%	33.00%
Customer Concentration Risk [Member] | Cost of Goods, Total [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage		11.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Offsetting Assets [Line Items]
Concentration Risk, Percentage		42.00%
Customer Concentration Risk [Member] | Crude Supply and Logistics [Member] | Sales Revenue, Goods, Net [Member]
Offsetting Assets [Line Items]
Number of Customers | Customer	1	1
Customer Concentration Risk [Member] | Crude Supply and Logistics [Member] | Cost of Goods, Total [Member]
Offsetting Assets [Line Items]
Purchases of product		$ 39,500,000
Number of Suppliers	0	1
Customer Concentration Risk [Member] | Crude Supply and Logistics [Member] | Accounts Receivable [Member]
Offsetting Assets [Line Items]
Number of Customers | Customer		2

XML

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%

XML

Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$ (16,800)
Capital leases	$ 64	83
Total long-term debt	1,070,388	1,057,847
less: current portion of long-term debt	25	31
Long-term debt, net	1,070,363	1,057,816
Corporate, Non-Segment [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	300,000	300,000
Unamortized Debt Issuance Expense	(4,125)	(4,540)
Senior Notes	295,875	295,460
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
Rose Rock Midstream L P [Member]
Debt Instrument [Line Items]
Long-term debt, net	774,488	732,356
Rose Rock Midstream L P [Member] | Rose Rock Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	400,000	400,000
Unamortized Debt Issuance Expense	(6,442)	(6,975)
Senior Notes	393,558	393,025
Rose Rock Midstream L P [Member] | Rose Rock Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	350,000	350,000
Debt Instrument, Unamortized Discount	(5,178)	(5,455)
Unamortized Debt Issuance Expense	(4,931)	(5,266)
Senior Notes	339,891	339,279
Rose Rock Midstream L P [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings	$ 41,000	$ 0

XML

Long-Term Debt (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 MXN	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Interest Costs Capitalized			$ 1,600,000	$ 900,000
Corporate, Non-Segment [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 300,000,000		300,000,000
Corporate, Non-Segment [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	$ 5,800,000	$ 5,800,000	$ 11,700,000	11,700,000
Debt Instrument, Interest Rate, Stated Percentage	7.50%		7.50%		7.50%
Corporate, Non-Segment [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding	$ 6,000,000		$ 6,000,000
Interest rate in effect	2.00%		2.00%		2.00%
Corporate, Non-Segment [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	$ 1,200,000	1,000,000	$ 2,600,000	2,000,000
Maximum borrowing capacity	500,000,000		500,000,000
Borrowings outstanding	0		0			$ 30,000,000
SemMexico [Member]
Debt Instrument [Line Items]
Borrowings outstanding	0		0			0
SemMexico [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding	$ 15,800,000		$ 15,800,000		MXN 292,800,000
Interest rate in effect	0.25%		0.25%		0.25%
SemMexico [Member] | 100 million MXP facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 5,400,000		$ 5,400,000		MXN 100,000,000
Borrowings outstanding	0		0
Rose Rock Midstream, L.P. [Member] | Bilateral Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding	$ 18,900,000		$ 18,900,000
Interest rate in effect	1.75%		1.75%		1.75%
Rose Rock Midstream, L.P. [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding	$ 37,700,000		$ 37,700,000
Interest rate in effect	2.75%		2.75%		2.75%
Rose Rock Midstream, L.P. [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	$ 1,600,000	2,000,000	$ 3,100,000	4,200,000
Borrowings outstanding	$ 41,000,000		$ 41,000,000			0
Rose Rock Midstream, L.P. [Member] | Revolving Credit Facility [Member] | Alternate Base Rate Borrowings [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.25%		5.25%		5.25%
Maximum borrowing capacity	$ 585,000,000		$ 585,000,000
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
Rose Rock Midstream, L.P. [Member] | Rose Rock Notes due 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	$ 5,900,000	5,900,000	$ 11,700,000	11,700,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%		5.625%		5.625%
Rose Rock Midstream, L.P. [Member] | Rose Rock Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 5,178,000		$ 5,178,000			$ 5,455,000
Rose Rock Midstream, L.P. [Member] | Rose Rock Notes due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	5,200,000	$ 2,700,000	10,400,000	$ 2,700,000
Debt Instrument, Face Amount	$ 350,000,000		$ 350,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%		5.625%		5.625%
Mexican bank prime rate [Member] | SemMexico [Member] | 100 million MXP facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.50%
Fair Value, Inputs, Level 2 [Member] | Corporate, Non-Segment [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 290,000,000		$ 290,000,000
Fair Value, Inputs, Level 2 [Member] | Rose Rock Midstream, L.P. [Member] | Rose Rock Notes due 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	352,000,000		352,000,000
Fair Value, Inputs, Level 2 [Member] | Rose Rock Midstream, L.P. [Member] | Rose Rock Notes due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 305,000,000		$ 305,000,000

XML

Commitments and Contingencies - Purchase and sales commitments (Details) bbl in Thousands, $ in Thousands	Jun. 30, 2016 USD ($) bbl
Fixed Price Sales [Member]
Summary Of Purchase And Sale Commitments
Sale commitments, Volume (barrels) | bbl	4,563
Sale commitments, Value | $	$ 218,212
Floating Price Sales [Member]
Summary Of Purchase And Sale Commitments
Sale commitments, Volume (barrels) | bbl	17,773
Sale commitments, Value | $	$ 786,992
Fixed Price Purchases [Member]
Summary Of Purchase And Sale Commitments
Purchase commitments, Volume (barrels) | bbl	3,528
Purchase commitments, Value | $	$ 167,030
Floating Price Purchases [Member]
Summary Of Purchase And Sale Commitments
Purchase commitments, Volume (barrels) | bbl	12,701
Purchase commitments, Value | $	$ 601,820

XML

Commitments and Contingencies Commitments and Contingencies - Take or Pay (Details) - Fractionation capacity [Member] $ in Thousands	Jun. 30, 2016 USD ($)
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

XML

Commitments and Contingencies (Details Textual) bbl in Thousands		6 Months Ended
	Oct. 01, 2015 bbl	Jun. 30, 2016 USD ($)
Commitments and Contingencies (Textual) [Abstract]
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
Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Notice required to cancel purchase agreements, days		30 days
Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Notice required to cancel purchase agreements, days		120 days
Pipeline transportation capacity [Member] | Rose Rock Midstream L P [Member]
Commitments and Contingencies (Textual) [Abstract]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required | bbl	5
Term of unconditional purchase obligation	5 years
Unrecorded unconditional purchase obligation, annual amount		$ 9,400,000
Crude Transportation [Member]
Commitments and Contingencies (Textual) [Abstract]
Site contingency number of sites checked		5
SemCAMS [Member]
Commitments and Contingencies (Textual) [Abstract]
Asset retirement obligation liability		$ 18,000,000
Estimated cost to retire facilities		$ 126,000,000
SemGas [Member]
Commitments and Contingencies (Textual) [Abstract]
Site contingency number of sites checked		1
Proposed Department of Transportation penalty [Member] | Rose Rock Midstream L P [Member]
Commitments and Contingencies (Textual) [Abstract]
Accrued Liabilities		$ 600,200

XML

Equity - Equity rollforward (Details) - USD ($) $ in Thousands		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

XML

Equity - Accumulated other comprehensive income (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
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)

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Equity - Dividends (Details) - $ / shares								6 Months Ended
	Aug. 25, 2016	May 26, 2016	Mar. 17, 2016	Nov. 24, 2015	Aug. 25, 2015	May 27, 2015	Mar. 20, 2015	Jun. 30, 2016
Dividends Payable [Line Items]
Dividend Per Share, Paid		$ 0.45	$ 0.45	$ 0.45	$ 0.42	$ 0.38	$ 0.34
Date Paid		May 26, 2016	Mar. 17, 2016	Nov. 24, 2015	Aug. 25, 2015	May 29, 2015	Mar. 20, 2015
First quarter 2015 dividend [Member]
Dividends Payable [Line Items]
Date of Record								Mar. 09, 2015
Second quarter 2015 dividend [Member]
Dividends Payable [Line Items]
Date of Record								May 18, 2015
Third quarter 2015 dividend [Member] [Member]
Dividends Payable [Line Items]
Date of Record								Aug. 17, 2015
Fourth quarter 2015 dividend [Member]
Dividends Payable [Line Items]
Date of Record								Nov. 16, 2015
first quarter 2016 dividend [Member]
Dividends Payable [Line Items]
Date of Record								Mar. 07, 2016
Second quarter dividend 2016 [Member]
Dividends Payable [Line Items]
Date of Record								May 16, 2016
Third quarter dividend 2016 [Member]
Dividends Payable [Line Items]
Date of Record								Aug. 15, 2016
Subsequent Event [Member]
Dividends Payable [Line Items]
Date Paid	Aug. 25, 2016
Common Stock, Dividends, Per Share, Declared	$ 0.45

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Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Jun. 22, 2016	Jun. 30, 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	$ 228,546
Payments of Stock Issuance Costs		$ 4,300
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)
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax		$ 1,589
Stock Compensation Plan [Member]
EQUITY (Textual) [Abstract]
Vested common stock		157,077
Cash settled UUD [Member]
EQUITY (Textual) [Abstract]
Unvested Dividend Equivalent Value		$ 390

XML

Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	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

XML

Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	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

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Supplemental Cash Flow Information - Operating assets and liabilities (Details) - USD ($) $ in Thousands	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)

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Supplemental Cash Flow Information (Details Textual) - USD ($) $ in Millions	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

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Related Party Transactions - Transactions with NGL Energy (Details) - NGL Energy [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
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

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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

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Condensed Consolidating Guarantor Financial Statements - Balance Sheets (Details) - USD ($) $ in Thousands	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)

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Condensed Consolidating Guarantor Financial Statements - Statements of Operations (Details) - USD ($) $ in Thousands	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)

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Condensed Consolidating Guarantor Financial Statements - Cash Flow Statements (Details) - USD ($) $ in Thousands	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)

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Condensed Consolidating Guarantor Financial Statements (Details Textual)	Jun. 30, 2016
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Equity method investment, ownership percentage	100.00%