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 September 30, 2013

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 by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court:    Yes  x    No  o

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 October 31, 2013
Class A	Common stock, $0.01 par	42,445,841	Shares
Class B	Common stock, $0.01 par	28,235	Shares

SemGroup Corporation

TABLE OF CONTENTS

	PART I – FINANCIAL INFORMATION
Item 1	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets – September 30, 2013 and December 31, 2012	5
	Condensed Consolidated Statements of Operations and Comprehensive Income – Three Months and Nine Months Ended September 30, 2013 and 2012	6
	Condensed Consolidated Statements of Cash Flows – Nine Months Ended September 30, 2013 and 2012	7
	Notes to Condensed Consolidated Financial Statements	8
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	46
Item 3	Quantitative and Qualitative Disclosures about Market Risk	66
Item 4	Controls and Procedures	69
	PART II – OTHER INFORMATION
Item 1	Legal Proceedings	70
Item 1A	Risk Factors	70
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	70
Item 3	Defaults Upon Senior Securities	70
Item 4	Mine Safety Disclosures	70
Item 5	Other Information	70
Item 6	Exhibits	70
	SIGNATURE	72

Page 2

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 contemplated drop-down transaction between us and Rose Rock Midstream, L.P., the prospects of our industry, our anticipated financial performance, the anticipated performance of NGL Energy Partners LP, 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 that we file with the Securities and Exchange Commission, those discussed in Item 2 "Management's Discussion and Analysis of Financial Condition and Results of Operations" below and the following:

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

• Our ability to comply with the covenants contained in, and maintain certain financial ratios required by, our credit facilities;

• Our ability to obtain additional capital on terms that are favorable to us;

• The ability of our subsidiary, Rose Rock Midstream, L.P., to make minimum quarterly distributions to its unitholders, including us;

• The operations of NGL Energy Partners LP, which we do not control;

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

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

• Our failure to comply with new or existing environmental laws or regulations or cross border laws or regulations;

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

• Changes in currency exchange rates;

• 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; and

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

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 (investor.relations@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.

_________________________________________________________________________________________________

Page 3

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

(Dollars in thousands)

	(Unaudited)
	September 30, 2013			December 31, 2012
ASSETS
Current assets:
Cash and cash equivalents	$	64,718		$	80,029
Restricted cash	34,182			34,678
Accounts receivable (net of allowance of $3,728 and $3,687 at September 30, 2013 and December 31, 2012, respectively)	368,246			346,169
Receivable from affiliates	13,039			6,178
Inventories	46,609			34,433
Other current assets	15,167			18,516
Total current assets	541,961			520,003
Property, plant and equipment (net of accumulated depreciation of $167,584 and $130,886 at September 30, 2013 and December 31, 2012, respectively)	1,057,116			814,724
Equity method investments	518,149			387,802
Goodwill	60,676			9,884
Other intangible assets (net of accumulated amortization of $9,521 and $6,701 at September 30, 2013 and December 31, 2012, respectively)	179,897			7,585
Other noncurrent assets, net	32,603			8,181
Total assets	$	2,390,402		$	1,748,179
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	303,672		$	253,623
Payable to affiliates	2,102			—
Accrued liabilities	81,509			63,831
Payables to pre-petition creditors	32,372			32,933
Deferred revenue	18,835			18,973
Other current liabilities	9,120			4,960
Current portion of long-term debt	26			24
Total current liabilities	447,636			374,344
Long-term debt	540,043			206,062
Deferred income taxes	53,588			65,620
Other noncurrent liabilities	95,418			80,625
Commitments and contingencies (Note 9)
SemGroup owners’ equity:
Common stock (Note 10)	425			420
Additional paid-in capital	1,108,041			1,039,189
Treasury stock, at cost (Note 10)	(613		)	(242		)
Accumulated deficit	(100,890		)	(145,674		)
Accumulated other comprehensive loss	(5,606		)	(1,299		)
Total SemGroup Corporation owners’ equity	1,001,357			892,394
Noncontrolling interests in consolidated subsidiaries	252,360			129,134
Total owners’ equity	1,253,717			1,021,528
Total liabilities and owners’ equity	$	2,390,402		$	1,748,179

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

Page 5

SEMGROUP CORPORATION

Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income

(Dollars in thousands, except per share amounts)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenues:
Product	$	288,452		$	209,202		$	765,334		$	708,408
Service	36,402			29,800			95,737			86,727
Other	32,894			38,850			108,617			126,525
Total revenues	357,748			277,852			969,688			921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	255,554			189,830			680,632			651,283
Operating	52,360			52,367			162,813			172,750
General and administrative	20,952			16,680			54,887			53,073
Depreciation and amortization	16,113			12,081			41,563			35,687
Loss (gain) on disposal of long-lived assets, net	408			(3,615		)	(130		)	(3,496		)
Total expenses	345,387			267,343			939,765			909,297
Earnings from equity method investments	7,483			3,116			39,689			22,903
Operating income	19,844			13,625			69,612			35,266
Other expenses (income):
Interest expense	9,080			1,992			15,971			7,763
Foreign currency transaction (gain) loss	(457		)	355			(973		)	358
Other expense, net	4,671			9,354			36,771			16,783
Total other expenses, net	13,294			11,701			51,769			24,904
Income from continuing operations before income taxes	6,550			1,924			17,843			10,362
Income tax expense (benefit)	3,413			2,091			(41,305		)	985
Income (loss) from continuing operations	3,137			(167		)	59,148			9,377
Income (loss) from discontinued operations, net of income taxes	(2		)	(265		)	65			(456		)
Net income (loss)	3,135			(432		)	59,213			8,921
Less: net income attributable to noncontrolling interests	5,054			2,336			14,429			7,915
Net income (loss) attributable to SemGroup	$	(1,919	)	$	(2,768	)	$	44,784		$	1,006
Net income (loss)	$	3,135		$	(432	)	$	59,213		$	8,921
Other comprehensive income (loss), net of income taxes	6,105			12,072			(4,307		)	14,930
Comprehensive income	9,240			11,640			54,906			23,851
Less: comprehensive income attributable to noncontrolling interests	5,054			2,336			14,429			7,915
Comprehensive income attributable to SemGroup	$	4,186		$	9,304		$	40,477		$	15,936
Net income (loss) per common share (Note 11):
Basic	$	(0.05	)	$	(0.07	)	$	1.06		$	0.02
Diluted	$	(0.05	)	$	(0.07	)	$	1.05		$	0.02

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

Page 6

SEMGROUP CORPORATION

Unaudited Condensed Consolidated Statements of Cash Flows

(Dollars in thousands)

	Nine Months Ended September 30,
	2013			2012
Cash flows from operating activities:
Net income	$	59,213		$	8,921
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized (gain) loss related to derivative instruments	(1,759		)	(432		)
Depreciation and amortization	41,563			36,123
Loss (gain) on disposal of long-lived assets, net	(107		)	(3,496		)
Earnings from equity method investments	(39,689		)	(22,903		)
Distributions from equity investments	39,714			25,053
Amortization of debt issuance costs	1,943			2,078
Deferred tax benefit	(49,448		)	(3,738		)
Non-cash equity compensation	5,311			4,832
Loss on fair value of warrants	37,028			17,082
Provision for uncollectible accounts receivable, net of recoveries	(357		)	(828		)
Currency (gain) loss	(973		)	358
Changes in operating assets and liabilities (Note 12)	4,080			(11,292		)
Net cash provided by operating activities	96,519			51,758
Cash flows from investing activities:
Capital expenditures	(131,650		)	(82,123		)
Proceeds from sale of long-lived assets	1,048			347
Investments in non-consolidated subsidiaries	(143,463		)	(63,999		)
Payments to acquire businesses	(356,201		)	—
Proceeds from the sale of non-consolidated affiliate	—			3,500
Distributions in excess of equity in earnings of affiliates	13,091			10,569
Net cash used in investing activities	(617,175		)	(131,706		)
Cash flows from financing activities:
Debt issuance costs	(11,865		)	(694		)
Borrowings on credit facilities	928,474			260,500
Principal payments on credit facilities and other obligations	(594,403		)	(179,001		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	210,226			—
Distributions to noncontrolling interests	(11,458		)	(5,754		)
Proceeds from warrant exercises	225			—
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(371		)	(242		)
Dividends paid	(16,387		)	—
Net cash provided by financing activities	504,441			74,809
Effect of exchange rate changes on cash and cash equivalents	904			(977		)
Change in cash and cash equivalents	(15,311		)	(6,116		)
Change in cash and cash equivalents included in discontinued operations	—			(36		)
Change in cash and cash equivalents from continuing operations	(15,311		)	(6,152		)
Cash and cash equivalents at beginning of period	80,029			73,613
Cash and cash equivalents at end of period	$	64,718		$	67,461

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

Page 7

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

1. OVERVIEW

SemGroup Corporation is a Delaware corporation headquartered in Tulsa, Oklahoma. SemGroup Corporation is the successor entity of SemGroup, L.P., which was an Oklahoma limited partnership. 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, SemGroup, L.P., and their subsidiaries.

Basis of presentation

The accompanying condensed consolidated 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.

The accompanying condensed consolidated financial statements are unaudited. The condensed consolidated balance sheet at December 31, 2012, is derived from audited financial statements.

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 nine months ended September 30, 2013, are not necessarily indicative of the results to be expected for the full year ending December 31, 2013.

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. 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, 2012, which are included in our Annual Report on Form 10-K for the year ended December 31, 2012, filed with the SEC.

Certain reclassifications have been made to conform previously reported balances to the current presentation.

Our significant accounting policies are consistent with those described in our Annual Report on Form 10-K for the year ended December 31, 2012.

Recent accounting pronouncements

On January 31, 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2013-01, "Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities," which clarifies the scope of the offsetting disclosure requirements in ASU 2011-11, "Disclosures About Offsetting Assets and Liabilities." Under ASU 2013-01, the disclosure requirements apply to derivative instruments accounted for in accordance with Accounting Standards Codification ("ASC") 815, "Derivatives and Hedging," including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending arrangements that are either offset on the balance sheet or subject to an enforceable master netting arrangement or similar agreement. ASU 2013-01 is effective for fiscal years beginning on or after January 1, 2013, and interim periods within those years. Retrospective application is required for all comparative periods presented. We adopted this guidance in the first quarter of 2013. The impact of adoption was not material.

On February 5, 2013, the FASB issued ASU 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income." This ASU adds new disclosure requirements for items reclassified out of accumulated other comprehensive income ("AOCI"). The ASU is intended to help entities improve the transparency of changes in other comprehensive income ("OCI") and items reclassified out of AOCI in their financial statements. It does not amend any existing requirements for reporting net income or OCI in the financial statements. We adopted this guidance in the first quarter of 2013. The impact of adoption was not material.

On February 28, 2013, the FASB issued ASU 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date (a consensus of the FASB Emerging Issues Task Force)." The ASU requires entities to “measure obligations resulting from joint and several

Page 8

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

1. OVERVIEW, Continued

liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date, as the sum of the following:

•the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors; and

•any additional amount the reporting entity expects to pay on behalf of its co-obligors.”

Required disclosures include a description of the joint and several arrangement and the total outstanding amount of the obligation for all joint parties. The ASU permits entities to aggregate disclosures (as opposed to providing separate disclosures for each joint and several obligation). These disclosure requirements are incremental to the existing related-party disclosure requirements in ASC 850, "Related Party Disclosures." The ASU is effective for public entities for all prior periods in fiscal years beginning on or after December 15, 2013, and interim reporting periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

On March 4, 2013, the FASB issued ASU 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment Upon Derecognition of Certain Subsidiaries or Groups of Assets Within a Foreign Entity or of an Investment in a Foreign Entity - a consensus of the FASB Emerging Issues Task Force”, which indicates that the entire amount of a cumulative translation adjustment ("CTA") related to an entity's investment in a foreign entity should be released when there has been a:

• sale of a subsidiary or group of net assets within a foreign entity and the sale represents the substantially complete liquidation of the investment in the foreign entity;

• loss of a controlling financial interest in an investment in a foreign entity (i.e., the foreign entity is deconsolidated); or

• step acquisition for a foreign entity (i.e., when an entity has changed from applying the equity method for an investment in a foreign entity to consolidating the foreign entity).

The ASU does not change the requirement to release a pro rata portion of the CTA of the foreign entity into earnings for a partial sale of an equity method investment in a foreign entity. For public entities, this ASU is effective for fiscal years beginning on or after December 15, 2013, and interim periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

In July 2013, the FASB issued ASU 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," which requires an unrecognized tax benefit to be classified as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except in certain circumstances. For public entities, this ASU is effective for fiscal years beginning on or after December 15, 2013, and interim periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

2. ROSE ROCK MIDSTREAM, L.P.

We control the operations of our consolidated subsidiary, Rose Rock Midstream, L.P. ("Rose Rock") through our ownership of the general partner interest. As of September 30, 2013, we own the 2% general partner interest and a 46.7% limited partner interest made up of 2.9 million common units, 8.4 million subordinated units and 1.25 million Class A units.

In August 2013, Rose Rock sold 4.75 million common limited partner units to third-party purchasers for $152.5 million, net of underwriting discounts and commissions. Proceeds were used to repay borrowings on the Rose Rock credit facility.

On January 11, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. ("SCPL") to Rose Rock in exchange for (i) cash of approximately $189.5 million, (ii) the issuance of 1.5 million common units, (iii) the issuance of 1.25 million Class A units and (iv) an increase of the capital account of the general partner of Rose Rock and a related issuance of general partner interest, to allow the general partner of Rose Rock to maintain its 2% general partner interest. SCPL owns a 51% membership interest in White Cliffs Pipeline, L.L.C. ("White Cliffs"), which owns a 527-mile pipeline that transports crude oil from Platteville, Colorado to Cushing, Oklahoma (the "White Cliffs Pipeline"), giving Rose Rock an indirect 17% interest in White Cliffs.

Page 9

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

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

The Class A units are not entitled to receive any distribution of available cash (other than upon liquidation) prior to the first day of the month immediately following the first month for which the average daily throughput volumes on the White Cliffs Pipeline for such month are 125,000 barrels per day or greater. Upon such date, the Class A units will automatically convert into common units.

As this transaction was between parties under common control, Rose Rock recorded its interest in SCPL at SemGroup's historical value and, as such, no gain on the sale was recognized by SemGroup. Proceeds in excess of the historical value were accounted for as an equity transaction between Rose Rock and SemGroup and resulted in a $90.5 million reduction to noncontrolling interests in consolidated subsidiaries and an offsetting increase to additional paid-in capital of $56.8 million (net of tax impact of $33.7 million). This non-cash entry represents the portion of the proceeds in excess of historical cost which were attributed to Rose Rock's third-party unitholders.

In connection with this transaction, Rose Rock issued and sold 2.0 million common units to third-party purchasers in a private placement for aggregate consideration of $59.3 million. In addition, Rose Rock exercised the accordion feature of its revolving credit facility and increased the total borrowing capacity under the credit facility from $150 million to $385 million and made a borrowing of $133.5 million under the credit facility. The proceeds from the private placement and the borrowing were used by Rose Rock to fund the cash consideration in the transaction with us and to pay certain related transaction costs and expenses.

SemGroup incurred $1.4 million of general and administrative expense associated with the transaction including amounts expensed by Rose Rock. Rose Rock incurred $3.7 million of cost, of which $1.6 million of equity issuance costs were offset against proceeds, $1.6 million was related to the borrowing and was deferred and $0.5 million was expensed as general and administrative expense in the condensed consolidated statement of operations and comprehensive income.

Outside ownership interests in Rose Rock are reflected in “noncontrolling interests in consolidated subsidiaries” on our condensed consolidated balance sheets at September 30, 2013 and December 31, 2012. The portion of Rose Rock’s net income attributable to outside owners is reflected within “net income attributable to noncontrolling interests” in our condensed consolidated statements of operations and comprehensive income for the three months and nine months ended September 30, 2013.

We receive distributions from Rose Rock on our common and subordinated 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. Rose Rock’s partnership agreement requires Rose Rock to distribute all of its available cash each quarter in the following manner:

	Total Quarterly Distributions Per Unit Target Amount						Marginal Percentage Interest in Distributions
							Unitholders		General Partner		Incentive Distribution Rights
Minimum Quarterly Distributions					$	0.362500	98.0	%	2.0	%	—
First Target Distribution	above	$	0.362500	up to	$	0.416875	98.0	%	2.0	%	—
Second Target Distribution	above	$	0.416875	up to	$	0.453125	85.0	%	2.0	%	13.0	%
Third Target Distribution	above	$	0.453125	up to	$	0.543750	75.0	%	2.0	%	23.0	%
Thereafter				above	$	0.543750	50.0	%	2.0	%	48.0	%

The following table shows the cash distributions paid or declared during 2013 and 2012 (in thousands, except for per unit amounts):

Page 10

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

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

		Record Date	Payment Date	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, 2011	*	February 3, 2012	February 13, 2012	$	0.0670	*	$	23	$	—	$	93	$	561	$	470	$	1,147
March 31, 2012		May 7, 2012	May 15, 2012	$	0.3725		$	128	$	—	$	517	$	3,125	$	2,607	$	6,377
June 30, 2012		August 6, 2012	August 14, 2012	$	0.3825		$	131	$	—	$	532	$	3,209	$	2,678	$	6,550
September 30, 2012		November 5, 2012	November 14, 2012	$	0.3925		$	134	$	—	$	545	$	3,294	$	2,748	$	6,721
December 31, 2012		February 4, 2013	February 14, 2013	$	0.4025		$	167	$	—	$	1,163	$	3,377	$	3,624	$	8,331
March 31, 2013		May 6, 2013	May 15, 2013	$	0.4300		$	179	$	41	$	1,242	$	3,607	$	3,872	$	8,941
June 30, 2013		August 5, 2013	August 14, 2013	$	0.4400		$	183	$	72	$	1,271	$	3,692	$	3,962	$	9,180
September 30, 2013	**	November 5, 2013	November 14, 2013	$	0.4500	**	$	232	$	127	$	1,301	$	3,775	$	6,189	$	11,624

*Minimum quarterly distribution for quarter ended December 31, 2011 was prorated for the period beginning immediately after the closing of Rose Rock’s IPO, December 14, 2011 through December 31, 2011.

**Expected payment date and amounts for distributions related to the quarter ended September 30, 2013.

Certain summarized balance sheet information of Rose Rock is shown below (in thousands):

	(unaudited)
	September 30, 2013		December 31, 2012
Cash	$	1,914	$	108
Other current assets	292,386		250,509
Property, plant and equipment, net	313,193		291,530
Equity method investment	77,449		—
Goodwill	27,261		—
Other noncurrent assets, net	10,536		2,579
Total assets	$	722,739	$	544,726
Current liabilities	$	254,491	$	231,843
Long-term debt	85,043		4,562
Partners’ capital attributable to SemGroup	130,845		179,187
Partners’ capital attributable to noncontrolling interests	252,360		129,134
Total liabilities and partners’ capital	$	722,739	$	544,726

Certain summarized income statement information of Rose Rock for the three months and nine months ended September 30, 2013 and 2012 is shown below (in thousands):

Page 11

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	181,831	$	131,554	$	514,485	$	468,687
Cost of products sold	$	157,550	$	111,790	$	446,507	$	412,847
Operating, general and administrative expenses	$	12,394	$	9,779	$	30,434	$	25,976
Depreciation and amortization expense	$	4,130	$	3,066	$	11,327	$	9,032
Earnings from equity method investment	$	3,527	$	—	$	10,431	$	—
Net income	$	9,411	$	6,469	$	30,539	$	19,353

3. INVESTMENTS IN NON-CONSOLIDATED SUBSIDIARIES

Our investments in affiliates over which we have significant influence, but for which we do not control the operating decisions of the investee, are accounted for under the equity method. Under the equity method, we do not report the individual assets and liabilities of our investees on our condensed consolidated balance sheets. Instead, our ownership interest is reflected in one line as a noncurrent asset on our condensed consolidated balance sheets. Our equity method investments consist of the following (in thousands):

	September 30, 2013		December 31, 2012
White Cliffs	$	228,076	$	138,970
NGL Energy	187,632		174,398
Glass Mountain	102,441		74,434
Total equity method investments	$	518,149	$	387,802

Under the equity method, we do not report the individual revenues and expenses of our investees in our condensed consolidated statements of income. Instead, our interest in the earnings of our investees is reflected in one line item on our condensed consolidated statement of operations and comprehensive income. Our earnings from equity method investments consist of the following (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
White Cliffs	$	10,786		$	10,021		$	31,886		$	25,053
NGL Energy	(3,288		)	(6,905		)	7,828			(2,150		)
Glass Mountain	(15		)	—			(25		)	—
Total earnings from equity method investments	$	7,483		$	3,116		$	39,689		$	22,903

Cash distributions received from equity methods investments consist of the following (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
White Cliffs	$	12,755	$	10,794	$	39,436	$	30,561
NGL Energy	4,671		2,090		13,369		5,063
Glass Mountain	—		—		—		—
Total cash distributions received from equity method investments	$	17,426	$	12,884	$	52,805	$	35,624

White Cliffs

We account for our 51% ownership of White Cliffs under the equity method, as the other owners have substantive rights to participate in its management.

Page 12

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

3. INVESTMENTS IN NON-CONSOLIDATED SUBSIDIARIES, Continued

In August 2012, the owners of White Cliffs approved an expansion project to construct a 12" pipeline from Platteville, Colorado to Cushing, Oklahoma. The project is expected to cost approximately $300 million, which will be funded by capital calls to owners. Our funding requirement will be 51% of the total cost. We have contributed approximately $97.8 million for project funding up through September 30, 2013, including $35.9 million and $95.5 million for the three months and nine months ended September 30, 2013, respectively, and estimate our expected remaining contributions to be $53.3 million, which will be made in 2014.

Certain summarized income statement information of White Cliffs for the three months and nine months ended September 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	31,453	$	28,522	$	92,238	$	76,910
Operating, general and administrative expenses	$	5,141	$	3,857	$	14,433	$	11,382
Depreciation and amortization expense	$	4,720	$	4,995	$	14,150	$	14,964
Net income	$	21,579	$	19,670	$	63,642	$	50,564

The equity in earnings of White Cliffs for the three months and nine months ended September 30, 2013 and 2012 reported in our condensed consolidated statement of operations and comprehensive income is less than 51% of the net income of White Cliffs for the same period. 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 $0.5 million and $24 thousand of such general and administrative expense for the three months ended September 30, 2013 and 2012, respectively, and $1.2 million and $1.5 million for the nine months ended September 30, 2013 and 2012, respectively.

NGL Energy Partners LP

We own 9,133,409 common units representing limited partner interests in NGL Energy Partners LP (NYSE: NGL) (“NGL Energy”), which represents approximately 17.0% of the total 53,622,659 limited partner units of NGL Energy outstanding at June 30, 2013, and a 11.78% interest in the general partner of NGL Energy.

At September 30, 2013, the fair market value of our 9,133,409 common unit investment in NGL Energy was $281.7 million, based on a September 30, 2013 closing price of $30.84 per common unit. This does not reflect our interest in the general partner of NGL Energy. The fair value of our limited partner investment in NGL Energy is categorized as a Level 1 measurement, as it is based on quoted market prices.

Our policy is to record our equity in earnings of NGL Energy on a one-quarter lag, as we do not expect information on the earnings of NGL Energy to always be available in time to consistently record the earnings in the quarter in which they are generated. Accordingly, the equity in earnings from NGL Energy, which is reflected in our condensed consolidated statements of operations and comprehensive income for the three months and nine months ended September 30, 2013 and 2012, relates to the earnings of NGL Energy for the three months and nine months ended June 30, 2013 and 2012, prorated for the period of time we held our ownership interest in NGL Energy.

Certain unaudited summarized income statement information of NGL Energy for the three months and nine months ended June 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2013			2012			2013		2012
Revenue	$	1,385,957		$	326,436		$	4,341,778	$	1,236,023
Cost of products sold	$	1,303,076		$	298,985		$	3,989,511	$	1,128,581
Operating, general and administrative expenses	$	67,499		$	33,298		$	206,824	$	76,015
Depreciation and amortization expense	$	22,724		$	9,227		$	68,989	$	21,260
Net income	$	(17,508	)	$	(24,710	)	$	45,310	$	(4,678	)

Page 13

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

3. INVESTMENTS IN NON-CONSOLIDATED SUBSIDIARIES, Continued

Glass Mountain Pipeline, LLC

In May 2012, we formed a joint venture, Glass Mountain Pipeline, LLC (“Glass Mountain” or "GMP"), to construct, maintain and operate a 210-mile crude oil pipeline system ("the Glass Mountain Pipeline") originating in Alva and Arnett, Oklahoma and terminating at Cushing, Oklahoma. The Glass Mountain Pipeline is expected to be operational in January 2014. Once the pipeline is in service, it will be operated by a subsidiary of Rose Rock. Our original ownership interest in GMP was 25%. In September 2012, we acquired an additional 25% ownership interest in GMP, bringing our total ownership interest to 50% . We account for our investment in GMP using the equity method. As of September 30, 2013, we have invested $102.4 million in GMP including our capital contributions, amounts paid to acquire the additional ownership percentage, and capitalized interest. We invested $6.7 million and $28.0 million in GMP for the three months and nine months ended September 30, 2013, respectively. We expect to make additional contributions of approximately $26.5 million for the remainder of 2013 and $3.5 million in 2014.

4. 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, other than White Cliffs and Glass Mountain, which have been included within the Crude segment. Our investment in NGL Energy is included within the SemStream segment. 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 and interest expenses incurred at the corporate level are allocated to the segments, based on our allocation policies in effect at the time.

Page 14

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

4. SEGMENTS, Continued

	Three Months Ended September 30, 2013
	Crude		SemStream			SemCAMS		SemGas		SemLogistics			SemMexico			Corporate and Other			Consolidated
								(dollars in thousands)
Revenues:
External	$	181,831	$	—		$	48,979	$	59,220	$	2,169		$	65,549		$	—		$	357,748
Intersegment	—		—			—		6,575		—			—			(6,575		)	—
Total revenues	181,831		—			48,979		65,795		2,169			65,549			(6,575		)	357,748
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	157,550		—			106		48,403		—			56,070			(6,575		)	255,554
Operating	9,098		—			33,980		5,436		1,616			2,230			—			52,360
General and administrative	3,360		114			3,446		1,923		1,679			2,510			7,920			20,952
Depreciation and amortization	4,130		—			2,631		4,992		2,334			1,529			497			16,113
Loss (gain) on disposal of long-lived assets, net	—		—			—		679		—			(271		)	—			408
Total expenses	174,138		114			40,163		61,433		5,629			62,068			1,842			345,387
Earnings from equity method investments	10,771		(3,288		)	—		—		—			—			—			7,483
Operating income (loss)	18,464		(3,402		)	8,816		4,362		(3,460		)	3,481			(8,417		)	19,844
Other expenses (income), net	3,634		(1,238		)	4,720		880		(217		)	(21		)	5,536			13,294
Income (loss) from continuing operations before income taxes	$	14,830	$	(2,164	)	$	4,096	$	3,482	$	(3,243	)	$	3,502		$	(13,953	)	$	6,550
Total assets at September 30, 2013 (excluding intersegment receivables)	$	1,012,535	$	187,632		$	320,431	$	510,129	$	167,741		$	95,317		$	96,617		$	2,390,402

For the three months ended September 30, 2013, one customer from our Crude segment accounted for 13% of our total consolidated revenue.

Page 15

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

4. SEGMENTS, Continued

	Three Months Ended September 30, 2012
	Crude			SemStream			SemCAMS		SemGas			SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	131,616		$	—		$	54,301	$	27,627		$	2,213		$	62,095		$	—		$	277,852
Intersegment	—			—			—		2,251			—			—			(2,251		)	—
Total revenues	131,616			—			54,301		29,878			2,213			62,095			(2,251		)	277,852
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	111,790			—			309		24,068			97			55,817			(2,251		)	189,830
Operating	6,042			7			40,081		2,931			1,436			1,870			—			52,367
General and administrative	5,015			528			3,354		1,329			990			1,501			3,963			16,680
Depreciation and amortization	3,066			—			2,664		1,797			2,388			1,536			630			12,081
Gain on disposal of long-lived assets, net	(3,500		)	—			—		(3		)	—			(112		)	—			(3,615		)
Total expenses	122,413			535			46,408		30,122			4,911			60,612			2,342			267,343
Earnings from equity method investments	10,021			(6,905		)	—		—			—			—			—			3,116
Operating income (loss)	19,224			(7,440		)	7,893		(244		)	(2,698		)	1,483			(4,593		)	13,625
Other expenses (income), net	(119		)	(2,551		)	3,419		(378		)	337			(82		)	11,075			11,701
Income (loss) from continuing operations before income taxes	$	19,343		$	(4,889	)	$	4,474	$	134		$	(3,035	)	$	1,565		$	(15,668	)	$	1,924

Page 16

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

4. SEGMENTS, Continued

	Nine Months Ended September 30, 2013
	Crude			SemStream			SemCAMS		SemGas		SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	514,485		$	—		$	151,219	$	135,782	$	7,827		$	160,375		$	—		$	969,688
Intersegment	—			—			—		15,678		—			—			(15,678		)	—
Total revenues	514,485			—			151,219		151,460		7,827			160,375			(15,678		)	969,688
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	446,507			—			290		111,141		—			138,372			(15,678		)	680,632
Operating	20,527			1			116,372		13,869		5,303			6,741			—			162,813
General and administrative	10,778			430			10,933		5,112		4,285			7,175			16,174			54,887
Depreciation and amortization	11,327			—			7,925		9,353		6,987			4,467			1,504			41,563
Loss (gain) on disposal of long-lived assets, net	(25		)	6			—		673		—			(784		)	—			(130		)
Total expenses	489,114			437			135,520		140,148		16,575			155,971			2,000			939,765
Earnings from equity method investments	31,861			7,828			—		—		—			—			—			39,689
Operating income (loss)	57,232			7,391			15,699		11,312		(8,748		)	4,404			(17,678		)	69,612
Other expenses (income), net	10,925			(3,399		)	14,179		2,149		896			(339		)	27,358			51,769
Income (loss) from continuing operations before income taxes	$	46,307		$	10,790		$	1,520	$	9,163	$	(9,644	)	$	4,743		$	(45,036	)	$	17,843

For the nine months ended September 30, 2013, two customers from our Crude segment each accounted for 10% of our total consolidated revenue.

Page 17

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

4. SEGMENTS, Continued

	Nine Months Ended September 30, 2012
	Crude			SemStream			SemCAMS		SemGas			SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	468,748		$	7		$	169,149	$	81,917		$	8,610		$	193,229		$	—		$	921,660
Intersegment	—			—			—		7,535			—			—			(7,535		)	—
Total revenues	468,748			7			169,149		89,452			8,610			193,229			(7,535		)	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	412,847			33			499		70,607			196			174,636			(7,535		)	651,283
Operating	17,957			(18		)	135,165		9,092			4,521			6,033			—			172,750
General and administrative	9,796			582			10,404		4,564			4,249			6,730			16,748			53,073
Depreciation and amortization	9,032			—			7,910		5,153			7,040			4,614			1,938			35,687
Gain on disposal of long-lived assets, net	(3,444		)	—			—		(3		)	—			(49		)	—			(3,496		)
Total expenses	446,188			597			153,978		89,413			16,006			191,964			11,151			909,297
Earnings from equity method investments	25,053			(2,150		)	—		—			—			—			—			22,903
Operating income (loss)	47,613			(2,740		)	15,171		39			(7,396		)	1,265			(18,686		)	35,266
Other expenses (income), net	(739		)	(2,507		)	13,974		924			1,805			233			11,214			24,904
Income (loss) from continuing operations before income taxes	$	48,352		$	(233	)	$	1,197	$	(885	)	$	(9,201	)	$	1,032		$	(29,900	)	$	10,362

5. INVENTORIES

Inventories consist of the following (in thousands):

	September 30, 2013		December 31, 2012
Crude oil	$	32,720	$	24,840
Asphalt and other	13,889		9,593
Total inventories	$	46,609	$	34,433

Page 18

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

6. 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 these assets and liabilities at September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013									December 31, 2012
	Level 1			Netting*			Total			Level 1			Netting*			Total
Assets:
Commodity derivatives	$	857		$	(132	)	$	725		$	22		$	(22	)	$	—
Total assets	857			(132		)	725			22			(22		)	—
Liabilities:
Commodity derivatives	$	132		$	(132	)	$	—		$	1,056		$	(22	)	$	1,034
Warrants	46,350			—			46,350			32,858			—			32,858
Total liabilities	46,482			(132		)	46,350			33,914			(22		)	33,892
Net assets (liabilities) at fair value	$	(45,625	)	$	—		$	(45,625	)	$	(33,892	)	$	—		$	(33,892	)

*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 use as inputs 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. These also include common stock warrants (Note 10) which are traded on the New York Stock Exchange.

“Level 2” measurements use as inputs market observable and corroborated prices for similar commodity derivative contracts. Assets and liabilities classified as Level 2 include over-the-counter (“OTC”) traded forward contracts and swaps.

“Level 3” measurements use as inputs information from a pricing service and internal valuation models incorporating observable and unobservable market data. These may 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.

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 September 30, 2013, 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 classified as Level 2 or Level 3 during the three months and nine months ended September 30, 2013 and 2012, as such no rollforward of 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 location and time basis risk. 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, future contracts and forward contracts of crude oil and natural gas liquids. These are defined as follows:

Page 19

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

6. FINANCIAL INSTRUMENTS, Continued

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 unaudited notional quantities for commodity derivative instruments entered into (in thousands of barrels):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Sales	695	470	2,025	1,153
Purchases	805	380	2,095	1,066

We have not designated any of our commodity derivative instruments as accounting hedges. We record 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):

	September 30, 2013				December 31, 2012
	Assets		Liabilities		Assets		Liabilities
Commodity contracts	$	725	$	—	$	—	$	1,034

We have posted margin deposits as collateral with brokers who have the right of set off associated with these funds. Our margin accounts were in a net liability position at September 30, 2013 of $0.1 million. At December 31, 2012, our margin deposit balance was $1.9 million. 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 September 30, 2013 and December 31, 2012, we would have had net asset positions of $0.6 million and $0.8 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 September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Commodity contracts	$	(1,652	)	$	(631	)	$	(2,430	)	$	(342	)

Warrants

As described in Note 10, upon emergence from bankruptcy, we issued certain common stock warrants. These warrants are recorded at fair value in other noncurrent liabilities on the condensed consolidated balance sheets, with changes in the fair value recorded to other expense (income).

7. INCOME TAXES

Due to our emergence from bankruptcy and overall restructuring, we recorded a full valuation allowance on all U.S. federal and state deferred tax assets in all periods prior to March 31, 2013. 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.

Page 20

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

7.     INCOME TAXES, Continued

The nine months ended September 30, 2013 includes a discrete tax benefit of $50.9 million for the partial release of our valuation allowance. The tax benefit was recorded for the three months ended March 31, 2013. Gain recognition, for tax purposes, on the contribution of a 33% interest in SemCrude Pipeline, L.L.C. to Rose Rock, as disclosed in Note 2, had a material impact to the available positive and objectively verifiable evidence for that quarter and, combined with other factors, resulted in the change in our assessment of recoverability of the deferred tax assets. Under ASC 740, "Income Taxes", such evidence was not considered in the valuation allowance at December 31, 2012, due to fundamentals of the transaction which remained subject to market influence until closed. We did not release the valuation allowance attributable to a small portion of our state net operating loss carryovers which have shorter carryover periods. 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.

We have 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 all jurisdictions. In foreign jurisdictions, all tax years within the relevant statute of limitations for periods prior to the emergence from bankruptcy remain open for examination. Currently, there are no examinations in progress for our federal or state jurisdictions. Canada Revenue Agency has initiated an income tax audit of SemCAMS ULC for the tax year 2009, which remains in progress. We do not anticipate the SemCAMS ULC audit will have a significant impact on the results of operations or financial position. No other foreign jurisdictions are currently under audit.

The effective tax rate was 52% and 109% for the three months ended September 30, 2013 and 2012, respectively, and (231)% and 10% for the nine months ended September 30, 2013 and 2012, respectively. The rate for the three months ended September 30, 2013 is impacted by a $3.3 million discrete deferred tax benefit resulting from enactment of U.K. tax rate reductions for future periods. 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, a noncontrolling interest in Rose Rock for which taxes are not provided, warrant expense which is not deductible for tax purposes, and the impact of the valuation allowance or release recorded against our deferred tax assets. 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. Deferred tax liabilities, with the exception of those related to certain long-lived assets, have been considered as a source of future taxable income in establishing the amount of the valuation allowance. These combined factors, and the magnitude of 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.

8. LONG-TERM DEBT

Our long-term debt consisted of the following (in thousands):

	September 30, 2013		December 31, 2012
SemGroup 7.50% senior unsecured notes	$	300,000	$	—
SemGroup corporate revolving credit facility	155,000		201,500
Rose Rock credit facility	85,000		4,500
SemMexico credit facility	—		—
Capital leases	69		86
Total long-term debt	$	540,069	$	206,086
less: current portion of long-term debt	26		24
Noncurrent portion of long-term debt	$	540,043	$	206,062

SemGroup senior unsecured notes

On June 14, 2013, we completed an offering of $300 million of 7.50% senior unsecured notes due 2021 (the “Notes”) to certain initial purchasers for resale to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and to non-U.S. persons outside the United States pursuant to Regulation S of the Securities Act. The Notes are guaranteed by certain of our subsidiaries: SemGas, L.P., SemCanada, L.P., SemCanada

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

8. LONG-TERM DEBT, Continued

II, L.P., SemMaterials, L.P., SemStream, 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, Wattenberg Holding, LLC, Glass Mountain Holding, LLC and Mid-America Midstream Gas Services, L.L.C. (collectively, the "Guarantors").

The net proceeds from the offering were $294.0 million, after deducting the initial purchasers' discount. We used the net proceeds from the offering to (i) fund a portion of our acquisition on August 1, 2013, of all the outstanding equity interests in Mid-America Midstream Gas Services, L.L.C., a subsidiary of Chesapeake Energy Corporation, and (ii) during the second quarter of 2013, repay amounts borrowed under our revolving credit facility.

The Notes are governed by an indenture, as supplemented, between the Company and its subsidiary Guarantors and Wilmington Trust, N.A., as trustee (the “Indenture”). The Indenture includes customary covenants, including limitations on our ability to incur additional indebtedness or issue certain preferred shares; pay dividends and make certain distributions, investments and other restricted payments; create certain liens; sell assets; enter into transactions with affiliates; enter into sale and lease-back transactions; merge, consolidate, sell or otherwise dispose of all or substantially all of our assets; and designate our subsidiaries as unrestricted under the Indenture.

The Indenture includes customary events of default, including events of default relating to non-payment of principal and other amounts owing from time to time, failure to provide required reports, failure to comply with agreements in the indenture, cross payment-defaults to any material indebtedness, bankruptcy and insolvency events, certain unsatisfied judgments, and invalidation or cessation of the subsidiary guarantee of a significant subsidiary. A default would permit holders to declare the Notes and accrued interest due and payable.

The Notes are effectively subordinated in right of payment to any of our, and the Guarantors', existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness and are structurally subordinated to the obligations of any subsidiary that is not a guarantor of the Notes.

The Company may issue additional Notes under the Indenture from time to time, subject to the terms of the Indenture.

Except as described below, the Notes are not redeemable at the Company's option prior to June 15, 2016. From and after June 15, 2016, the Company may redeem the Notes, in whole or in part, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest, if redeemed during the twelve-month period beginning on June 15 of each of the years indicated below:

Year	Percentage
2016	105.625%
2017	103.750%
2018	101.875%
2019 and thereafter	100.000%

Prior to June 15, 2016, the Company may, at its option, on one or more occasions, redeem up to 35% of the sum of the original aggregate principal amount of the Notes at a redemption price equal to 107.500% of the aggregate principal amount thereof, plus accrued and unpaid interest, with the net cash proceeds of one or more equity offerings of the Company, subject to certain conditions.

Prior to June 15, 2016, the Company may also redeem all or part of the Notes at a price equal to the principal plus a premium equal to the greater of 1% of the principal or the excess of the present value of the June 15, 2016 redemption price from the table above plus all required interest payments due through June 15, 2016, computed using a discount rate based on a published United States Treasury Rate plus 50 basis points, over the principal value of such Note.

In the event of a change of control, the Company is required to offer to repurchase the Notes at an amount equal to 101% of the principal plus accrued and unpaid interest.

The Notes are also subject to a Registration Rights Agreement which requires the Company to file a registration statement with the SEC and to use commercially reasonable efforts to cause the registration statement to be declared effective by the SEC so that holders of the Notes can exchange the Notes and related guarantees for registered notes (the "Exchange Notes") and guarantees that have substantially identical terms as the Notes and related guarantees. The guarantees of the Exchange Notes will be full and unconditional and will constitute the joint and several obligations of the Guarantors. Failure to meet the terms of the Registration Rights Agreement will require the Company to pay

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

8. LONG-TERM DEBT, Continued

incremental interest of 0.25% per annum, increased by an additional 0.25% per annum for each 90-day period for which registration default continues (up to a maximum of 1.0% per annum).

Interest on the Notes is payable in arrears on June 15th and December 15th to holders of record on June 1st and December 1st each year until maturity. For the three and nine months ended September 30, 2013, we incurred $6.0 million and $7.1 million of interest expense related to the Notes, respectively, including the amortization of debt issuance costs. At September 30, 2013, we had $6.4 million of unamortized debt issuance costs related to the Notes included in other noncurrent assets on our condensed consolidated balance sheet.

At September 30, 2013, we were in compliance with the terms of the Notes.

SemGroup corporate credit agreement

Our revolving credit facility had a capacity of $500 million at September 30, 2013. This capacity may be used either for cash borrowings or letters of credit, although the maximum letter of credit capacity is $250 million. At September 30, 2013, we had $155 million outstanding cash borrowings on this facility and outstanding letters of credit of $4.5 million.

The interest rate in effect at September 30, 2013, on $155 million of alternate base rate ("ABR") borrowings was 5.5%. At September 30, 2013, the rate in effect on letters of credit was 3.25%. In addition, a fronting fee of 0.25% is charged on outstanding letters of credit. A commitment fee of 0.5% is charged on any unused capacity on the revolving credit facility.

At September 30, 2013, $4.8 million in capitalized loan fees, net of accumulated amortization, was recorded in other noncurrent assets, which is being amortized over the life of the facility.

We recorded interest expense related to the SemGroup revolving credit facility of $2.3 million and $1.7 million for the three months ended September 30, 2013 and 2012, respectively, including amortization of debt issuance costs. We recorded interest expense related to the SemGroup revolving credit facility of $5.0 million and $4.9 million for the nine months endedSeptember 30, 2013 and 2012, respectively, including amortization of debt issuance costs.

At September 30, 2013, we were in compliance with the terms of the credit agreement.

On April 22, 2013, the credit agreement was amended to (i) permit the increase of the facility by up to an additional $300 million subject to satisfaction of certain conditions, (ii) remove the restriction limiting unsecured senior or subordinated indebtedness to $200 million, while establishing certain requirements for obtaining unsecured senior or subordinated indebtedness of $200 million or more and (iii) establish less restrictive leverage covenants.

On May 3, 2013, we elected to increase the credit facility capacity by $200 million, for a total capacity of $500 million. The facility can be increased by an additional $100 million. In connection with the increase, we recorded $2.2 million of capitalized loan fees which are being amortized over the remaining life of the facility.

The credit agreement is guaranteed by all of our material domestic subsidiaries (except for SemCrude Pipeline, L.L.C. and Rose Rock Midstream, L.P. and its subsidiaries) and secured by a lien on substantially all of our property and assets, subject to customary exceptions.

Rose Rock credit facility

At September 30, 2013, there was $85.0 million outstanding cash borrowings under the Rose Rock revolving credit facility, of which $55.0 million incurred interest at the ABR plus an applicable margin, and $30 million incurred interest at the Eurodollar rate plus an applicable margin. The interest rate in effect at September 30, 2013 on $55.0 million of ABR borrowings was 4.50%. The interest rate in effect at September 30, 2013 on $30 million of Eurodollar rate borrowings was 2.53%.

Rose Rock had $31.8 million in outstanding letters of credit, and the rate in effect was 2.25%. In addition, a fronting fee of 0.25% is charged on outstanding letters of credit. A commitment fee that ranges from 0.375% to 0.50%, depending on a leverage ratio specified in the credit agreement, is charged on any unused capacity of the revolving credit facility.

On January 11, 2013, the credit facility capacity was increased to $385 million and Rose Rock borrowed $133.5 million in connection with the purchase of a 33% interest in SCPL from SemGroup and to pay transaction related expenses. Approximately $1.6 million of related costs have been capitalized and will be amortized over the remaining life of the facility.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

8. LONG-TERM DEBT, Continued

On September 20, 2013, the credit agreement was amended to extend the agreement to September 20, 2018 and permit the increase of the facility by not more than $200 million, subject to certain conditions. The amended agreement allows the Rose Rock to incur unsecured or subordinated debt without limitation, subject to certain conditions, and provides alternative financial performance covenants at Rose Rock's election after the issuance of $200 million or more unsecured or subordinated debt, in aggregate. Additionally, the interest rate and commitment fees related to the revolving facility were lowered.

Rose Rock had $7.6 million of Secured Bilateral Letters of Credit outstanding at September 30, 2013. The interest rate in effect was 1.75% on $0.6 million and 2.0% on $7.0 million. Secured Bilateral Letters of Credit are external to the facility and do not reduce revolver availability.

We recorded $1.9 million and $0.5 million of interest expense related to this facility during the three months ended September 30, 2013 and 2012, respectively, including amortization of debt issuance costs. We recorded $6.1 million and $1.4 million of interest expense related to this facility during the nine months ended September 30, 2013 and 2012, respectively, including amortization of debt issuance costs.

At September 30, 2013, $3.7 million in capitalized loan fees, net of accumulated amortization, was recorded in other noncurrent assets, which is being amortized over the life of the facility.

At September 30, 2013, we were in compliance with the terms of the credit agreement.

SemMexico facilities

During the third quarter, SemMexico renewed a credit agreement that allows SemMexico to borrow up to 56 million Mexican pesos (U.S. $4.3 million at the September 30, 2013 exchange rate) at any time during the term of the facility. The new maturity date of the facility is July 2014. Borrowings are unsecured and bear interest at the bank prime rate in Mexico plus 1.70%. At September 30, 2013, there were no borrowings outstanding on this facility.

On June 13, 2012, SemMexico entered into a credit agreement that allows SemMexico to borrow up to 44 million Mexican pesos (U.S. $3.3 million at the September 30, 2013 exchange rate) at any time during the term of the facility, which matures in June 2015. Borrowings are unsecured and bear interest at the bank prime rate in Mexico plus 2.0%. At September 30, 2013, there were no outstanding borrowings on this facility.

SemMexico also has outstanding letters of credit of 292.8 million Mexican pesos at September 30, 2013 (U.S. $22.3 million at the September 30, 2013 exchange rate). Fees are generally charged on outstanding letters of credit at a rate of 0.5%.

At September 30, 2013, we were in compliance with the terms of these facilities.

Capitalized interest

During the nine months ended September 30, 2013 and 2012, we capitalized interest from our credit facilities of $2.9 million and $0.2 million, respectively.

Fair value

We estimate the fair value of our senior unsecured notes to be $306 million at September 30, 2013, based on unadjusted, transacted market prices, which is categorized as a Level 1 measurement. We estimate that the fair value of our other long-term debt was not materially different than the recorded values at September 30, 2013. 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 other debt outstanding at September 30, 2013. This estimate is categorized as a Level 3 measurement.

9. 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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

9. COMMITMENTS AND CONTINGENCIES, Continued

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”).

(a) Confirmation order appeal

Luke Oil appeal. On October 21, 2009, Luke Oil Company, C&S Oil/Cross Properties, Inc., Wayne Thomas Oil and Gas and William R. Earnhardt Company (collectively, “Luke Oil”) filed an objection to the Plan of Reorganization “to the extent that the Plan of Reorganization may alter, impair, or otherwise adversely affect Luke Oil’s legal rights or other interests.” On October 28, 2009, the bankruptcy court overruled the Luke Oil objection and entered the confirmation order. On November 6, 2009, Luke Oil filed a Notice of Appeal. On December 23, 2009, Luke Oil’s appeal was docketed in the United States District Court for the District of Delaware. We filed a motion to dismiss the appeal as equitably moot. On May 21, 2012, the District Court entered an order granting our motion to dismiss Luke Oil's appeal of the confirmation order. On June 18, 2012, Luke Oil filed its Notice of Appeal, notifying the District Court and the parties to the lawsuit that it was appealing the decision of the District Court to the United States Court of Appeals for the Third Circuit. On August 27, 2013, the United States Court of Appeals for the Third Circuit issued an opinion, and on September 18, 2013 issued a judgment, reversing the District Court’s dismissal of the confirmation order and remanding the case to the District Court for consideration on the merits of Luke Oil’s appeal of the confirmation order. On October 1, 2013, at the request of the parties, the District Court entered an order staying the case and referring it to a magistrate judge for mediation. While we believe that this action is without merit and are vigorously defending this matter on appeal, an adverse ruling on this action could have a material adverse impact on us.

(b) Investigations

Around the time of our predecessor's bankruptcy filings, several governmental agencies launched investigations regarding the circumstances of the filings. The mandate and scope of these investigations were very broad and the investigations are ongoing.

Bankruptcy examiner. On October 14, 2008, the bankruptcy court appointed an examiner to (i) investigate the circumstances surrounding our predecessor's trading strategy prior to bankruptcy filings; (ii) investigate the circumstances surrounding certain insider transactions and the formation of SemGroup Energy Partners L.P. (a former subsidiary); (iii) investigate the circumstances surrounding the potential improper use of borrowed funds and funds generated from operations and the liquidation of assets to satisfy margin calls related to our predecessor's trading strategy and that of certain entities owned or controlled by former officers and directors of the general partner of SemGroup, L.P.; (iv) determine whether any directors, officers or employees of the general partner of SemGroup, L.P. participated in fraud, dishonesty, incompetence, misconduct, mismanagement, or irregularity in the management of our affairs; and (v) determine whether the SemGroup debtor estates have causes of action against current or former officers, directors, or employees of the general partner of SemGroup, L.P. arising from such participation. The examiner’s report was filed with the bankruptcy court on April 15, 2009.

Certain current and prior employees of the general partner of SemGroup, L.P. are referenced in the examiner’s report and the report’s conclusions may suggest possible civil or criminal liability on their part. To the extent such claims exist, they are property of a litigation trust that was established for the benefit of pre-petition creditors pursuant to the Plan of Reorganization, and are not property of the reorganized SemGroup Corporation. This litigation trust is pursuing claims against certain former officers, at its own expense. We may incur expenses, which are not expected to be material, related to information and document requests of the litigation trust related to such claims. Any indemnification obligations to such officers by SemGroup, L.P. were discharged under the Plan of Reorganization.

CFTC. On June 19, 2008, we received a request for voluntary production from the Commodity Futures Trading Commission (“CFTC”). Subsequent to the bankruptcy filings, the CFTC sent other requests for voluntary production. The CFTC has also served subpoenas upon us requiring us to produce various documents and for the depositions of our representatives. We continue to comply with the CFTC’s requests. We are unaware of any currently pending formal charges against us by the CFTC.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

9. COMMITMENTS AND CONTINGENCIES, Continued

(c) Claims reconciliation process

A large number of parties have made claims against us for obligations alleged to have been incurred prior to our predecessor's bankruptcy filing. On September 15, 2010, the bankruptcy court entered an order estimating the contingent, unliquidated and disputed claims and authorizing distributions to holders of allowed claims. Pursuant to that order we have begun making distributions to the claimants. We continue to attempt to settle unresolved claims.

Pursuant to the Plan of Reorganization, we committed to settle authorized and allowed bankruptcy claims by paying a specified amount of cash, issuing a specified number of warrants, and issuing a specified number of shares of SemGroup Corporation common stock. We do not believe the resolution of the remaining outstanding claims will exceed the total amount of consideration established under the Plan of Reorganization for all claimants; instead, the resolution of the remaining claims in some cases will impact the relative share of the established pool of common stock and warrants that certain claimants receive.

However, under certain circumstances we could be required to pay additional funds to settle the specified group of claims to be settled with cash. Pursuant to the Plan of Reorganization, a specified amount of restricted cash was set aside at the Emergence Date, which we expect to be sufficient to settle this group of claims. Since the Emergence Date, we have made significant progress in resolving these claims, and we continue to believe that the cash set aside at the Emergence Date will be sufficient to settle these claims. However, we have not yet reached a resolution of all of these claims, and if the total settlement amount of all of these claims exceeds the specified amount, we will be required to pay additional funds to satisfy the total settlement amount for this specified group of claims. If this were to become probable of occurring, we would be required to record a liability and a corresponding expense.

Blueknight claim

Blueknight Energy Partners, L.P. (“Blueknight”), which was formerly a subsidiary of SemGroup, together with other entities related to Blueknight, entered into a Shared Services Agreement on April 7, 2009, with SemCrude, L.P., now known as Rose Rock Midstream Crude, L.P. (“SemCrude”) and SemManagement, L.L.C. (which are currently subsidiaries of SemGroup). The services provided by SemCrude to Blueknight under this agreement included assisting Blueknight with movement of crude oil belonging to Blueknight’s customers and with the operation of Blueknight’s Oklahoma pipeline system and its Cushing, Oklahoma terminal. Under the subsequent amendments to the agreements beginning in May 2010, certain of these services were phased out, and Blueknight began to perform all services necessary for the movement of its crude oil and the operation of its Cushing terminal without SemCrude’s assistance.

In a letter dated August 18, 2011, Blueknight claimed that SemCrude owes Blueknight approximately 141,000 barrels of crude oil. We responded to Blueknight’s letter denying their charges and requesting documentation from Blueknight of its claim. On February 14, 2012, after months of interaction between the parties through which Blueknight was requested to substantiate its claim, Blueknight filed suit against SemCrude and other related companies in the District Court of Oklahoma County, Oklahoma. On May 1, 2012, the case was transferred to Tulsa County, Oklahoma. On July 2, 2012, the Tulsa County District Court appointed a Special Master to review terminal operations accounting records and determine whether 141,000 barrels of crude oil owned by Blueknight is missing after three months of operations in April through June, 2010. On June 11, 2013, the Special Master’s Report was filed with the District Court finding a shortage in Blueknight’s Cushing terminal and Oklahoma pipeline system of 148,000 barrels. However, after a review of all records created during that three month time period, the Special Master was unable to determine how the shortage might have occurred and she was unable to determine the ownership of the potential shortage.

We are currently seeking discovery in the District Court of documentation and testimony on the potential cause and the impact, if any, of the shortage found by the Special Master. Blueknight is resisting discovery and has asked for summary judgment against SemCrude and the other defendants for the entire terminal and pipeline system shortage. 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

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

9. COMMITMENTS AND CONTINGENCIES, Continued

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 and one owned by SemGas) that KDHE believes, based on their historical use, may have 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 and results indicate that four of the sites have limited amounts of soil contamination that will require remediation and ground water contamination that may require further delineation and/or ongoing monitoring. Work plans have been submitted to, and approved by, the KDHE. We do not anticipate any penalties or fines for these historical sites.

A water pipeline break occurred at a SemCAMS facility during August 2010. This resulted in a spill of material that was predominantly salt water containing a small amount of hydrocarbons. The incident was investigated by Environment Canada and Alberta Environment. On February 14, 2012, charges were filed against SemCAMS by the Federal Government of Canada (Department of Fisheries) and the Province of Alberta (Alberta Environment) in connection with this incident. SemCAMS and the Federal and Provincial Crowns are discussing a resolution of the charges on specific terms. We expect that the matter will be finally resolved by the end of the year. We accrued a liability for estimated fines and environmental contributions of $0.4 million in December 2010, which we still carry on our books at September 30, 2013.

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. We have recorded an asset retirement obligation liability of $42.1 million at September 30, 2013, which is included within other noncurrent liabilities on our condensed consolidated balance sheets. This amount was calculated using the $104.6 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 September 30, 2013, such commitments included the following (in thousands):

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

9. COMMITMENTS AND CONTINGENCIES, Continued

	Volume (Barrels)	Value
Fixed price purchases	202	$	20,324
Fixed price sales	330	$	34,749
Floating price purchases	18,016	$	1,781,247
Floating price sales	18,600	$	1,814,662

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 began in July 2011 and continues through June 2023, subsequent to the extension of the agreement in the second quarter of 2013. At September 30, 2013, approximately $25.8 thousand was due under the contract and the amount of future obligation is approximately $88.2 million. 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.

See Note 3 for commitments related to Glass Mountain Pipeline LLC and the White Cliffs expansion project.

10. 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, 2012 to September 30, 2013 (in thousands):

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

10. EQUITY, Continued

	Common Stock		Additional Paid-in Capital			Treasury Stock			Accumulated Deficit			Accumulated Other Comprehensive Loss			Noncontrolling Interests			Total Owners’ Equity
Balance at December 31, 2012	$	420	$	1,039,189		$	(242	)	$	(145,674	)	$	(1,299	)	$	129,134		$	1,021,528
Net income	—		—			—			44,784			—			14,429			59,213
Other comprehensive income (loss), net of income taxes	—		—			—			—			(4,307		)	—			(4,307		)
Distributions to noncontrolling interests	—		—			—			—			—			(11,458		)	(11,458		)
Rose Rock Midstream, L.P. equity issuance	—		—			—			—			—			210,226			210,226
Transfer of SemCrude Pipeline interest to Rose Rock*	—		56,800			—			—			—			(90,516		)	(33,716		)
Warrants settlements	4		23,754			—			—			—			—			23,758
Dividends paid	—		(16,387		)	—			—			—			—			(16,387		)
Unvested dividend equivalent rights	—		(47		)	—			—			—			(33		)	(80		)
Non-cash equity compensation	—		4,733			—			—			—			578			5,311
Issuance of common stock under compensation plans	1		(1		)	—			—			—			—			—
Repurchase of common stock	—		—			(371		)	—			—			—			(371		)
Balance at September 30, 2013	$	425	$	1,108,041		$	(613	)	$	(100,890	)	$	(5,606	)	$	252,360		$	1,253,717

* On January 13, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. to our consolidated subsidiary, Rose Rock. As this transaction was between entities under common control, the interest in SemCrude Pipeline, L.L.C. was recorded by Rose Rock based on SemGroup's book value. This amount represents the purchase price in excess of book value which was attributed to the noncontrolling interest owners of Rose Rock. The entry to additional paid-in capital has been recorded net of tax.

Accumulated other comprehensive loss

The following table presents the changes in the components of accumulated other comprehensive loss from December 31, 2012 to September 30, 2013 (in thousands):

	Currency Translation			Employee Benefit Plans			Total
Balance at December 31, 2012	$	1,855		$	(3,154	)	$	(1,299	)
Currency translation adjustment	(4,444		)	—			(4,444		)
Changes related to benefit plans, net of income tax expense of $46	—			137			137
Balance at September 30, 2013	$	(2,589	)	$	(3,017	)	$	(5,606	)

There were no significant items reclassified out of accumulated other comprehensive loss to net income for the three months and nine months ended September 30, 2013.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

10. EQUITY, Continued

Common stock

Upon emergence from bankruptcy, we issued 40,882,496 shares of common stock. The Plan of Reorganization specified that we were to issue an additional 517,500 shares of common stock in settlement of pre-petition claims. As of September 30, 2013, we have issued 226,016 shares of this stock and will issue the remainder as the process of resolving the claims progresses. The owners’ equity balances on the condensed consolidated balance sheets include the shares that are required to be issued in settlement of pre-petition claims. The shares of common stock reflected on the condensed consolidated balance sheet at September 30, 2013 are summarized below:

Shares issued on Emergence Date	40,882,496
Shares subsequently issued in settlement of pre-petition claims	226,016
Remaining shares required to be issued in settlement of pre-petition claims	291,484
Issuance of shares under employee and director compensation programs(*)	689,320
Shares issued upon exercise of warrants	441,325
Total shares	42,530,641
Par value per share	$	0.01
Common stock on September 30, 2013 balance sheet (in thousands)	$	425

(*) These shares include 105,738 shares which vested during the nine months ended September 30, 2013. Of these vested shares, recipients sold back to the Company 8,591 shares to satisfy tax withholding obligations which are being recognized at cost as treasury stock on the condensed consolidated balance sheet.

In addition to the shares in the table above, there are shares of unvested restricted stock outstanding at September 30, 2013. The par value of these shares has not yet been reflected in common stock on the condensed consolidated balance sheet, as these shares have not yet vested. There are also shares of restricted stock that were returned to treasury upon forfeiture. The par value of these shares is not reflected in the condensed consolidated balance sheet, as no accounting recognition is given to forfeited shares.

The common stock includes Class A and Class B stock. Class A stock is eligible to be listed on an exchange, whereas Class B stock is not. Any share of Class B stock may be converted to Class A at the election of the holder. Both classes of stock have full voting rights. Both classes of stock have a par value of $0.01 per share. The total number of shares authorized for issuance is 90,000,000 shares of Class A stock and 10,000,000 shares of Class B stock.

Equity-based compensation

We have reserved common stock for issuance pursuant to director and employee compensation programs. At September 30, 2013, there were approximately 534,000 unvested shares that have been granted under these 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. Shares of restricted stock awards that were forfeited were returned to treasury. The par value of these shares is not reflected in the condensed consolidated balance sheet, as no accounting recognition is given to forfeited shares. 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 141,000 additional shares could vest. The holders of certain restricted stock awards granted prior to 2013 are entitled to equivalent dividends (“UDs”) to be received upon vesting of the restricted stock awards. The dividends will be settled in common shares based on the market price of our Class A shares as of the close of business on the vesting date. The UDs are subject to the same forfeiture and acceleration conditions as the associated restricted stock awards. At September 30, 2013, the value of the UDs related to unvested restricted stock awards was approximately $78 thousand. This is equivalent to 1,366 Class A shares based on the quarter end close of business market price of our Class A shares of $57.02 per share. Dividends related to the 2013 restricted stock awards will be settled in cash upon vesting.

During the nine months ended September 30, 2013, we have issued 201,451 restricted stock awards with a weighted average grant date fair value of $52.78 per award.

Warrants

Upon emergence from bankruptcy, we issued 1,634,210 warrants. The Plan of Reorganization specified that we were to issue an additional 544,737 warrants in settlement of the pre-petition claims. As of September 30, 2013, we have issued

Page 30

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

10. EQUITY, Continued

237,897 of the warrants and will issue the remainder as the process of resolving the claims progresses. The warrants are traded on the New York Stock Exchange under the ticker symbol SEMGWS. We classify the warrant fair value as a Level 1 measurement. The warrants reflected on the condensed consolidated balance sheet at September 30, 2013 are summarized below:

Warrants issued on Emergence Date	1,634,210
Warrants subsequently issued in settlement of pre-petition claims	237,897
Remaining warrants to be issued in settlement of pre-petition claims	306,840
Warrants exercised (*)	(818,124		)
Total warrants at September 30, 2013	1,360,823
Fair value per warrant at September 30, 2013	$	34.06
Warrant value included within other noncurrent liabilities on September 30, 2013 consolidated balance sheet	$	46,349,631

(*) During the nine months ended September 30, 2013, certain warrant holders exercised a total of 772,817 warrants resulting in the issuance of 425,618 Class A shares.

Each warrant entitles the holder to purchase one share of common stock for $25 at any time before the November 30, 2014 expiration date. Upon exercise, a holder may elect a cashless exercise, whereby the number of shares to be issued to the holder is reduced, in lieu of a cash payment. In the event of a change in control of the Company, the holders of the warrants would have the right to sell the warrants to us, and we would have the right to purchase the warrants from the holders. In either case, the price to be paid for the warrants would be calculated using a standard pricing model with inputs specified in the warrant agreement.

Employee Stock Purchase Plan

As part of the Company's 2013 Annual Meeting of Stockholders held on May 22, 2013, Company stockholders approved the 2013 Employee Stock Purchase Plan (“ESPP”). The ESPP will be effective October 1, 2013 and will allow Company employees to purchase the Company's Class A stock through payroll deductions based on six month offering periods. Share purchases will be limited to 12,500 shares per offering period per employee-participant. Shares will be able to be purchased by employee-participants at 85% of the Fair Market Value (as defined by the ESPP). Upon the purchase of shares, employee-participants will receive all stockholder rights including dividend and voting rights, and will be permitted to sell their shares at any time. The Company has made 1.0 million shares available under the ESPP. The ESPP terminates on September 30, 2023 or earlier at the discretion of the Board of Directors. No shares are expected to be issued under the ESPP in fiscal year 2013 as the end of the first offering period does not occur until March 31, 2014. The Company expects to begin recording stock based compensation expense related to the ESPP in the fourth quarter for 2013, the start of the first offering period.

Dividends

On May 30, 2013, we paid a dividend of $0.19 per share to shareholders of record on May 20, 2013. On August 30, 2013, we paid a dividend of $0.20 per share to shareholders of record on August 19, 2013.

On November 6, 2013, we declared a dividend of $0.21 per share payable on December 3, 2013 to shareholders of record on November 22, 2013.

11. EARNINGS PER SHARE

Earnings per share is calculated based on income from continuing and discontinued operations less any income attributable to the noncontrolling interest.  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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

11. EARNINGS PER SHARE, Continued

Basic earnings (loss) per share (“Basic EPS”) is calculated based on the weighted average shares outstanding during the period.  Diluted earnings (loss) per share (“Diluted EPS”) includes the dilutive effect of warrants and unvested equity compensation awards.

The following summarizes the calculation of basic earnings (loss) per share for the three months and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

	Three Months Ended September 30, 2013									Three Months Ended September 30, 2012
	Continuing Operations			Discontinued Operations			Net			Continuing Operations			Discontinued Operations			Net
Income	$	3,137		$	(2	)	$	3,135		$	(167	)	$	(265	)	$	(432	)
less: Income attributable to noncontrolling interests	5,054			—			5,054			2,336			—			2,336
Numerator	$	(1,917	)	$	(2	)	$	(1,919	)	$	(2,503	)	$	(265	)	$	(2,768	)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400			41,400			41,400			41,400			41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128			1,128			1,128			549			549			549
Denominator	42,528			42,528			42,528			41,949			41,949			41,949
Basic earnings (loss) per share	$	(0.05	)	$	—		$	(0.05	)	$	(0.06	)	$	(0.01	)	$	(0.07	)

	Nine Months Ended September 30, 2013						Nine Months Ended September 30, 2012
	Continuing Operations		Discontinued Operations		Net		Continuing Operations		Discontinued Operations			Net
Income	$	59,148	$	65	$	59,213	$	9,377	$	(456	)	$	8,921
less: Income attributable to noncontrolling interests	14,429		—		14,429		7,915		—			7,915
Numerator	$	44,719	$	65	$	44,784	$	1,462	$	(456	)	$	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400		41,400		41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	874		874		874		530		530			530
Denominator	42,274		42,274		42,274		41,930		41,930			41,930
Basic earnings (loss) per share	$	1.06	$	—	$	1.06	$	0.03	$	(0.01	)	$	0.02

The following summarizes the calculation of diluted earnings (loss) per share for the three months and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

11. EARNINGS PER SHARE, Continued

	Three Months Ended September 30, 2013									Three Months Ended September 30, 2012
	Continuing Operations			Discontinued Operations			Net			Continuing Operations			Discontinued Operations			Net
Income	$	3,137		$	(2	)	$	3,135		$	(167	)	$	(265	)	$	(432	)
less: Income attributable to noncontrolling interests	5,054			—			5,054			2,336			—			2,336
Numerator	$	(1,917	)	$	(2	)	$	(1,919	)	$	(2,503	)	$	(265	)	$	(2,768	)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400			41,400			41,400			41,400			41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128			1,128			1,128			549			549			549
Effect of dilutive securities	—			—			—			—			—			—
Denominator	42,528			42,528			42,528			41,949			41,949			41,949
Diluted earnings (loss) per share	$	(0.05	)	$	—		$	(0.05	)	$	(0.06	)	$	(0.01	)	$	(0.07	)

	Nine Months Ended September 30, 2013						Nine Months Ended September 30, 2012
	Continuing Operations		Discontinued Operations		Net		Continuing Operations		Discontinued Operations			Net
Income	$	59,148	$	65	$	59,213	$	9,377	$	(456	)	$	8,921
less: Income attributable to noncontrolling interests	14,429		—		14,429		7,915		—			7,915
Numerator	$	44,719	$	65	$	44,784	$	1,462	$	(456	)	$	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400		41,400		41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	874		874		874		530		530			530
Effect of dilutive securities	270		270		270		252		252			252
Denominator	42,544		42,544		42,544		42,182		42,182			42,182
Diluted earnings (loss) per share	$	1.05	$	—	$	1.05	$	0.03	$	(0.01	)	$	0.02

During the three months and nine months ended September 30, 2013, we recorded expenses of $4.8 million and $37.0 million, respectively, related to the change in fair value of the warrants. During the three months and nine months ended September 30, 2012, we recorded expenses of $9.5 million and $17.1 million related to the change in fair value of the warrants. Because the mark to market valuation of the warrants resulted in losses, the warrants would have been antidilutive and, therefore, were not included in the computation of diluted earnings per share.

As we experienced losses from continuing operations for the three months ended September 30, 2013 and 2012, the equity based compensation (described in Note 10) did not cause any dilution.

12. 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):

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

12. SUPPLEMENTAL CASH FLOW INFORMATION, Continued

	Nine Months Ended September 30,
	2013			2012
Decrease (increase) in restricted cash	$	451		$	4,691
Decrease (increase) in accounts receivable	(30,977		)	(116,987		)
Decrease (increase) in receivable from affiliates	(6,861		)	622
Decrease (increase) in inventories	(13,983		)	(1,804		)
Decrease (increase) in derivatives and margin deposits	1,972			457
Decrease (increase) in other current assets	2,269			8,393
Decrease (increase) in other assets	258			2,457
Increase (decrease) in accounts payable and accrued liabilities	50,614			97,638
Increase (decrease) in payable to affiliates	2,102			(5,160		)
Increase (decrease) in payables to pre-petition creditors	(416		)	(4,541		)
Increase (decrease) in other noncurrent liabilities	(1,349		)	2,942
	$	4,080		$	(11,292	)

Other supplemental disclosures

We recorded a $90.5 million reduction to noncontrolling interests in consolidated subsidiaries and an offsetting increase to additional paid-in capital of $56.8 million (net of tax impact of $33.7 million). This non-cash entry represents the portion of the proceeds in excess of historical cost which were attributed to Rose Rock's third-party unitholders related to Rose Rock's purchase of a 33% interest in SCPL (Note 2).

During the nine months ended September 30,2013, we issued 425,618 Class A units related to the exercise of 772,817 warrants resulting in the non-cash reclassification of $23.5 million from other noncurrent liabilities to common stock and additional paid-in capital. Cash proceeds of $0.2 million were received in connection with the warrant exercises.

We paid cash interest of $7.3 million and $4.4 million for the nine months ended September 30,2013 and 2012, respectively.

We paid cash for income taxes (net of refunds received) of $6.6 million and $5.5 million for the nine months ended September 30,2013 and 2012, respectively.

We incurred liabilities for construction work in process that had not been paid of $16.4 million and $7.0 million as of September 30, 2013 and 2012, respectively. Such amounts are not included in capital expenditures on the consolidated statements of cash flows.

At September 30, 2013, we had a non-cash accrual of goodwill of $9.0 million from unpaid invoices which represent purchase price adjustments related to the acquisition of Mid-America Midstream Gas Services, L.L.C. This amount is not included in acquisition of Mid-America Midstream Gas Services, L.L.C. on the consolidated statement of cash flows.

13. RELATED PARTY TRANSACTIONS

NGL Energy

As described in Note 3, we own interests in NGL Energy, which we account for under the equity method.

During the three and nine months endedSeptember 30, 2013 and 2012, we generated the following transactions with NGL Energy (in thousands):

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

13.     RELATED PARTY TRANSACTIONS, Continued

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues	$	31,043	$	14,395	$	66,367	$	41,945
Purchases	$	8,018	$	6,009	$	8,018	$	36,573
Reimbursements from NGL Energy for transition services	$	60	$	28	$	156	$	526

High Sierra Crude Oil and Marketing, LLC

We generated revenues from High Sierra Crude Oil and Marketing, LLC ("High Sierra"), which is a subsidiary of NGL Energy, of $15.7 million and $12.4 million for the three months ended September 30, 2013 and 2012, respectively. We generated revenues from High Sierra of $68.6 million and $23.4 million for the nine months ended September 30, 2013 and 2012, respectively. Purchases from High Sierra were $6.5 million and $16.3 million for the three months ended September 30, 2013 and 2012, respectively. Purchases from High Sierra were $34.7 million and $32.2 million for the nine months ended September 30, 2013 and 2012, respectively. Transactions with High Sierra primarily relate to transportation and marketing of crude oil and condensate. 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 as the purchases of inventory and subsequent sales of the inventory were with the same counterparty.

White Cliffs

As described in Note 3, we account for our ownership interest in White Cliffs under the equity method. During the three months ended September 30, 2013 and 2012, we generated storage revenue from White Cliffs of approximately $0.8 million and $0.6 million, respectively. We generated storage revenue from White Cliffs of approximately $2.1 million and $1.8 million during the nine months ended September 30,2013 and 2012, respectively.

Glass Mountain

As described in Note 3, in May 2012, we formed a joint venture, Glass Mountain, to construct, maintain and operate a 210-mile crude oil pipeline system originating in Alva and Arnett, Oklahoma and terminating at Cushing, OK. In connection with the pipeline project, Glass Mountain entered into a Pipeline Construction Management Agreement with Glass Mountain Holding, LLC ("GMH"), a wholly-owned subsidiary of SemGroup. The Pipeline Construction Management Agreement appoints GMH as construction manager of the pipeline project for which GMH will receive $0.9 million prorated over the period of construction. For the three months and the nine months ended September 30,2013, Glass Mountain paid $0.1 million and $0.4 million to GMH pursuant to this agreement, the remaining balance of $0.1 million will be received by GMH over the period of construction.

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, General Counsel and Secretary. Mr. Berman does not perform any legal services for us. SemGroup paid $0.6 million and $0.5 million in legal fees and related expenses to this law firm during the three months ended September 30, 2013 and 2012, respectively (of which $68.0 thousand and $9.9 thousand was paid by White Cliffs during the three months ended September 30, 2013 and 2012, respectively). SemGroup paid $1.6 million and $1.2 million in legal fees and related expenses to this law firm during the nine months endedSeptember 30, 2013 and 2012, respectively (of which $79.6 thousand and $56.1 thousand was paid by White Cliffs during the nine months endedSeptember 30, 2013 and 2012, respectively).

14. ACQUISITIONS

Mid-America Midstream Gas Services, L.L.C.

On August 1, 2013, we acquired the equity interest of Mid-America Midstream Gas Services, L.L.C. ("MMGS"), a wholly owned subsidiary of Chesapeake Energy Corporation (NYSE: CHK)("Chesapeake"), which is the owner of gas gathering and processing assets in the Mississippi Lime play for approximately $316.1 million in cash. We incurred

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

14.     ACQUISITIONS, Continued

approximately $3.6 million in transaction related general and administrative expenses. The transaction was funded through the combination of a portion of the net proceeds from the sale of the Notes and a borrowing under the revolving credit facility under SemGroup's corporate credit agreement. Highlights of the acquisition include the following:

• 200 miles of gathering pipeline;

• Rose Valley I plant - A 200 mmcf/d (million cubic feet per day) cryogenic processing plant, expected to be in operation in the first quarter of 2014;

• Rose Valley II plant - A 200 mmcf/d cryogenic processing plant, expected to be in operation in the first quarter of 2016;

• Approximately 540,000 net acre dedication in the core of the Mississippi Lime play, supported by a recently announced joint venture between Chesapeake and Sinopec International Petroleum Exploration and Production Corporation ("Sinopec"); and

• A 20-year, 100% fee based, gas gathering and processing agreement with certain affiliates of Chesapeake and Sinopec.

Rose Valley plants I and II will require approximately $125 million of additional capital expenditures for completion as well as additional capital related to future well connections.

We have included MMGS in our condensed consolidated financial statements as of August 1, 2013 in our SemGas segment. During the three months and nine months ended September 30, 2013, our condensed consolidated statements of operations and comprehensive income did not include material amounts of revenue or operating income related to MMGS. The proforma impact to comparative prior year periods, had the acquisition occurred at the beginning of the comparative prior year period, is not significant as the business is in the development stage.

We have received a preliminary independent appraisal of the fair value of the assets acquired in the MMGS acquisition. The estimates of fair value reflected as of September 30, 2013 are subject to change and such changes could be material. We currently expect to complete this process prior to filing our Form 10-K for the year ending December 31, 2013. We have preliminarily estimated the fair value of the assets acquired as follows (in thousands):

Property, plant and equipment	$	123,316
Customer contract intangible	169,244
Goodwill	23,587
Total assets acquired	$	316,147

Goodwill represents the excess of the estimated consideration paid for the acquired business over the fair value of the individual assets acquired. Goodwill primarily represents the value of synergies between the acquired entity and the Company and the opportunity to use the acquired business as a platform for growth. We estimate that all of the goodwill will be deductible for federal income tax purposes and will be amortized on a straight-line basis over 15 years.

Barcas Field Services, LLC

On August 1, 2013, our consolidated subsidiary, Rose Rock, executed a definitive agreement to acquire the assets of Barcas Field Services, LLC ("Barcas"), which owns and operates a crude oil trucking fleet for $50.0 million in cash. The transaction closed on September 1, 2013. Highlights of the acquisition include the following:

• 114 trucks, 120 trailers and miscellaneous equipment; and

• a long-term take-or-pay customer transportation agreement.

We have included Barcas in our condensed consolidated financial statements as of September 1, 2013 in our Crude segment. During the three months and nine months ended September 30, 2013, our condensed consolidated statements of operations and comprehensive income did not include material amounts of revenue or operating income related to Barcas. The proforma impact to comparative prior year periods, had the acquisition occurred at the beginning of the comparative prior year period, is not significant.

We have received a preliminary independent appraisal of the fair value of the assets acquired in the Barcas acquisition. The estimates of fair value reflected as of September 30, 2013 are subject to change and such changes could be material. We currently expect to complete this process prior to filing our Form 10-K for the year ending December 31, 2013. We

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

14.     ACQUISITIONS, Continued

have preliminarily estimated the fair value of the assets acquired as follows (in thousands):

Property, plant and equipment	$	16,690
Customer contract intangible	6,018
Goodwill	27,261
Total assets acquired	$	49,969

Goodwill represents the excess of the estimated consideration paid for the acquired business over the fair value of the individual assets acquired. Goodwill primarily represents the value of synergies between the acquired entity and the Company, the opportunity to use the acquired business as a platform for growth, and the acquired assembled workforce. We estimate that all of the goodwill will be deductible for federal income tax purposes and will be amortized on a straight-line basis over 15 years.

NGL Energy

On August 6, 2013, we completed the acquisition of approximately 5.36% of the general partner of NGL Energy, which increases our ownership of NGL Energy's general partner to 11.78%.

Goodwill

The above acquisitions accounted for the majority of the change to our goodwill during the nine months ended September 30, 2013, as follows (in thousands):

Balance at December 31, 2012	$	9,884
Acquisitions	50,848
Currency translation adjustments	(56		)
Balance at September 30, 2013	$	60,676

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS

Pursuant to the Registration Rights Agreement related to our offering of $300 million of 7.50% senior unsecured notes, as discussed in Note 8, we intend to file a registration statement with the SEC so that holders of the Notes can exchange the Notes and the related guarantees for the Exchange Notes and related guarantees.

Each of the Guarantors is 100% owned by SemGroup Corporation (the "Parent"). Such guarantees of the Notes are full and unconditional and constitute the joint and several obligations of the Guarantors. The guarantees of the Exchange Notes will be full and unconditional and will 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.

Unaudited condensed consolidating financial statements for the Parent, the Guarantors and non-guarantors as of September 30, 2013 and December 31, 2012 and for each of the three months and nine months ended September 30, 2013 and 2012 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 a 33% interest in SCPL to Rose Rock in the first quarter of 2013 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.

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

Condensed Consolidating Guarantor Balance Sheets

	September 30, 2013
	Parent		Guarantors		Non-guarantors		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	9,711	$	—	$	58,135	$	(3,128	)	$	64,718
Restricted cash	32,880		—		1,302		—			34,182
Accounts receivable	640		11,256		356,350		—			368,246
Receivable from affiliates	752		15,189		244		(3,146		)	13,039
Inventories	—		1,164		45,445		—			46,609
Other current assets	2,417		330		12,420		—			15,167
Total current assets	46,400		27,939		473,896		(6,274		)	541,961
Property, plant and equipment	4,521		318,805		733,790		—			1,057,116
Equity method investments	1,475,019		524,300		228,076		(1,709,246		)	518,149
Goodwill	—		23,587		37,089		—			60,676
Other intangible assets	32		167,834		12,031		—			179,897
Other noncurrent assets, net	19,745		1,172		11,686		—			32,603
Total assets	$	1,545,717	$	1,063,637	$	1,496,568	$	(1,715,520	)	$	2,390,402
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	104	$	44,888	$	258,680	$	—		$	303,672
Payable to affiliates	14		121		1,967		—			2,102
Accrued liabilities	14,715		8,026		58,773		(5		)	81,509
Payables to pre-petition creditors	32,317		—		55		—			32,372
Deferred revenue	—		—		18,835		—			18,835
Other current liabilities	97		714		8,309		—			9,120
Current portion of long-term debt	—		—		26		—			26
Total current liabilities	47,247		53,749		346,645		(5		)	447,636
Long-term debt	455,000		—		85,043		—			540,043
Deferred income taxes	976		—		52,612		—			53,588
Other noncurrent liabilities	46,358		—		49,060		—			95,418
Commitments and contingencies
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	996,136		1,009,888		710,848		(1,715,515		)	1,001,357
Noncontrolling interests in consolidated subsidiaries	—		—		252,360		—			252,360
Total owners’ equity	996,136		1,009,888		963,208		(1,715,515		)	1,253,717
Total liabilities and owners’ equity	$	1,545,717	$	1,063,637	$	1,496,568	$	(1,715,520	)	$	2,390,402

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SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	December 31, 2012
	Parent		Guarantors		Non-guarantors		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	19,123	$	—	$	63,844	$	(2,938	)	$	80,029
Restricted cash	33,324		—		1,354		—			34,678
Accounts receivable	1,155		7,927		337,087		—			346,169
Receivable from affiliates	827		7,222		109		(1,980		)	6,178
Inventories	—		181		34,252		—			34,433
Other current assets	2,528		312		15,676		—			18,516
Total current assets	56,957		15,642		452,322		(4,918		)	520,003
Property, plant and equipment	5,399		122,899		686,426		—			814,724
Equity method investments	1,104,832		468,033		138,970		(1,324,033		)	387,802
Goodwill	—		—		9,884		—			9,884
Other intangible assets	36		—		7,549		—			7,585
Other noncurrent assets, net	3,606		1,317		3,258		—			8,181
Total assets	$	1,170,830	$	607,891	$	1,298,409	$	(1,328,951	)	$	1,748,179
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	70	$	12,304	$	241,249	$	—		$	253,623
Accrued liabilities	8,972		4,546		50,313		—			63,831
Payables to pre-petition creditors	32,876		—		57		—			32,933
Deferred revenue	—		—		18,973		—			18,973
Other current liabilities	134		580		4,263		(17		)	4,960
Current portion of long-term debt	—		—		24		—			24
Total current liabilities	42,052		17,430		314,879		(17		)	374,344
Long-term debt	201,500		—		4,562		—			206,062
Deferred income taxes	2,018		—		63,602		—			65,620
Other noncurrent liabilities	32,866		—		47,759		—			80,625
Commitments and contingencies
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	892,394		590,461		738,473		(1,328,934		)	892,394
Noncontrolling interests in consolidated subsidiaries	—		—		129,134		—			129,134
Total owners’ equity	892,394		590,461		867,607		(1,328,934		)	1,021,528
Total liabilities and owners’ equity	$	1,170,830	$	607,891	$	1,298,409	$	(1,328,951	)	$	1,748,179

Page 39

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 September 30, 2013
	Parent			Guarantors		Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	63,623	$	231,404		$	(6,575	)	$	288,452
Service	—			1,174		35,228			—			36,402
Other	—			—		32,894			—			32,894
Total revenues	—			64,797		299,526			(6,575		)	357,748
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			47,657		214,472			(6,575		)	255,554
Operating	—			5,069		47,291			—			52,360
General and administrative	7,855			2,242		10,855			—			20,952
Depreciation and amortization	497			4,838		10,778			—			16,113
Loss (gain) on disposal of long-lived assets, net	—			679		(271		)	—			408
Total expenses	8,352			60,485		283,125			(6,575		)	345,387
Earnings from equity method investments	15,497			24,667		10,787			(43,468		)	7,483
Operating income	7,145			28,979		27,188			(43,468		)	19,844
Other expenses (income):
Interest expense	4,029			1,314		5,136			(1,399		)	9,080
Foreign currency transaction gain	—			—		(457		)	—			(457		)
Other expense, net	3,383			1		(112		)	1,399			4,671
Total other expenses, net	7,412			1,315		4,567			—			13,294
Income (loss) from continuing operations before income taxes	(267		)	27,664		22,621			(43,468		)	6,550
Income tax expense (benefit)	4,960			—		(1,547		)	—			3,413
Income (loss) from continuing operations	(5,227		)	27,664		24,168			(43,468		)	3,137
Loss from discontinued operations, net of income taxes	—			—		(2		)	—			(2		)
Net income (loss)	(5,227		)	27,664		24,166			(43,468		)	3,135
Less: net income attributable to noncontrolling interests	—			—		5,054			—			5,054
Net income (loss) attributable to SemGroup	$	(5,227	)	$	27,664	$	19,112		$	(43,468	)	$	(1,919	)
Net income (loss)	$	(5,227	)	$	27,664	$	24,166		$	(43,468	)	$	3,135
Other comprehensive income (loss), net of income taxes	(2,162		)	—		8,267			—			6,105
Comprehensive income (loss)	(7,389		)	27,664		32,433			(43,468		)	9,240
Less: comprehensive income attributable to noncontrolling interests	—			—		5,054			—			5,054
Comprehensive income (loss) attributable to SemGroup	$	(7,389	)	$	27,664	$	27,379		$	(43,468	)	$	4,186

Page 40

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	Three Months Ended September 30, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	28,781		$	182,672		$	(2,251	)	$	209,202
Service	—			282			29,518			—			29,800
Other	—			62			38,788			—			38,850
Total revenues	—			29,125			250,978			(2,251		)	277,852
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			23,483			168,598			(2,251		)	189,830
Operating	—			3,055			49,312			—			52,367
General and administrative	3,840			2,793			10,047			—			16,680
Depreciation and amortization	628			1,649			9,804			—			12,081
Gain on disposal of long-lived assets, net	—			(3		)	(3,612		)	—			(3,615		)
Total expenses	4,468			30,977			234,149			(2,251		)	267,343
Earnings from equity method investments	14,201			20,904			10,021			(42,010		)	3,116
Operating income	9,733			19,052			26,850			(42,010		)	13,625
Other expenses (income):
Interest expense	4,262			(2,230		)	1,346			(1,386		)	1,992
Foreign currency transaction loss	—			—			355			—			355
Other expense (income), net	8,152			(50		)	(134		)	1,386			9,354
Total other expenses, net	12,414			(2,280		)	1,567			—			11,701
Income (loss) from continuing operations before income taxes	(2,681		)	21,332			25,283			(42,010		)	1,924
Income tax expense	96			—			1,995			—			2,091
Income (loss) from continuing operations	(2,777		)	21,332			23,288			(42,010		)	(167		)
Loss from discontinued operations, net of income taxes	—			(4		)	(261		)	—			(265		)
Net income (loss)	(2,777		)	21,328			23,027			(42,010		)	(432		)
Less: net income attributable to noncontrolling interests	—			—			2,336			—			2,336
Net income (loss) attributable to SemGroup	$	(2,777	)	$	21,328		$	20,691		$	(42,010	)	$	(2,768	)
Net income (loss)	$	(2,777	)	$	21,328		$	23,027		$	(42,010	)	$	(432	)
Other comprehensive loss, net of income taxes	1,475			—			10,597			—			12,072
Comprehensive income (loss)	(1,302		)	21,328			33,624			(42,010		)	11,640
Less: comprehensive income attributable to noncontrolling interests	—			—			2,336			—			2,336
Comprehensive income (loss) attributable to SemGroup	$	(1,302	)	$	21,328		$	31,288		$	(42,010	)	$	9,304

Page 41

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	Nine Months Ended September 30, 2013
	Parent			Guarantors		Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	146,880	$	634,117		$	(15,663	)	$	765,334
Service	—			1,646		94,091			—			95,737
Other	—			—		108,617			—			108,617
Total revenues	—			148,526		836,825			(15,663		)	969,688
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			108,814		587,481			(15,663		)	680,632
Operating	—			13,041		149,772			—			162,813
General and administrative	15,983			6,347		32,557			—			54,887
Depreciation and amortization	1,504			8,898		31,161			—			41,563
Loss (gain) on disposal of long-lived assets, net	—			682		(812		)	—			(130		)
Total expenses	17,487			137,782		800,159			(15,663		)	939,765
Earnings from equity method investments	52,432			63,011		31,886			(107,640		)	39,689
Operating income	34,945			73,755		68,552			(107,640		)	69,612
Other expenses (income):
Interest expense	1,112			3,141		15,845			(4,127		)	15,971
Foreign currency transaction gain	—			—		(973		)	—			(973		)
Other expense (income), net	32,826			159		(341		)	4,127			36,771
Total other expenses, net	33,938			3,300		14,531			—			51,769
Income from continuing operations before income taxes	1,007			70,455		54,021			(107,640		)	17,843
Income tax benefit	(40,469		)	—		(836		)	—			(41,305		)
Income from continuing operations	41,476			70,455		54,857			(107,640		)	59,148
Income (loss) from discontinued operations, net of income taxes	—			66		(1		)	—			65
Net income	41,476			70,521		54,856			(107,640		)	59,213
Less: net income attributable to noncontrolling interests	—			—		14,429			—			14,429
Net income attributable to SemGroup	$	41,476		$	70,521	$	40,427		$	(107,640	)	$	44,784
Net income	$	41,476		$	70,521	$	54,856		$	(107,640	)	$	59,213
Other comprehensive income (loss), net of income taxes	190			—		(4,497		)	—			(4,307		)
Comprehensive income	41,666			70,521		50,359			(107,640		)	54,906
Less: comprehensive income attributable to noncontrolling interests	—			—		14,429			—			14,429
Comprehensive income attributable to SemGroup	$	41,666		$	70,521	$	35,930		$	(107,640	)	$	40,477

Page 42

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	Nine Months Ended September 30, 2012
	Parent		Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—	$	86,158		$	629,770		$	(7,520	)	$	708,408
Service	—		951			85,776			—			86,727
Other	—		69			126,456			—			126,525
Total revenues	—		87,178			842,002			(7,520		)	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—		68,874			589,929			(7,520		)	651,283
Operating	—		9,255			163,495			—			172,750
General and administrative	16,528		6,109			30,436			—			53,073
Depreciation and amortization	1,938		4,707			29,042			—			35,687
Gain on disposal of long-lived assets, net	—		(3		)	(3,493		)	—			(3,496		)
Total expenses	18,466		88,942			809,409			(7,520		)	909,297
Earnings from equity method investments	36,721		39,992			25,053			(78,863		)	22,903
Operating income	18,255		38,228			57,646			(78,863		)	35,266
Other expenses (income):
Interest expense	4,064		(915		)	8,609			(3,995		)	7,763
Foreign currency transaction loss	—		—			358			—			358
Other expense (income), net	12,902		(19		)	(95		)	3,995			16,783
Total other expenses (income), net	16,966		(934		)	8,872			—			24,904
Income from continuing operations before income taxes	1,289		39,162			48,774			(78,863		)	10,362
Income tax expense	286		—			699			—			985
Income from continuing operations	1,003		39,162			48,075			(78,863		)	9,377
Income (loss) from discontinued operations, net of income taxes	3		(11		)	(448		)	—			(456		)
Net income	1,006		39,151			47,627			(78,863		)	8,921
Less: net income attributable to noncontrolling interests	—		—			7,915			—			7,915
Net income attributable to SemGroup	$	1,006	$	39,151		$	39,712		$	(78,863	)	$	1,006
Net income	$	1,006	$	39,151		$	47,627		$	(78,863	)	$	8,921
Other comprehensive income, net of income taxes	984		—			13,946			—			14,930
Comprehensive income	1,990		39,151			61,573			(78,863		)	23,851
Less: comprehensive income attributable to noncontrolling interests	—		—			7,915			—			7,915
Comprehensive income attributable to SemGroup	$	1,990	$	39,151		$	53,658		$	(78,863	)	$	15,936

Page 43

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

Condensed Consolidating Guarantor Statements of Cash Flows

	Nine Months Ended September 30, 2013
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by operating activities	$	19,717		$	16,424		$	74,197		$	(13,819	)	$	96,519
Cash flows from investing activities:
Capital expenditures	(622		)	(65,845		)	(65,183		)	—			(131,650		)
Proceeds from sale of long-lived assets	—			3			1,045			—			1,048
Proceeds from the sale of interest in SemCrude Pipeline, L.L.C. to Rose Rock Midstream L.P.	189,500			—			—			(189,500		)	—
Investments in non-consolidated subsidiaries	(18,775		)	(28,031		)	(96,657		)	—			(143,463		)
Payments to acquire businesses	—			(306,232		)	(49,969		)	—			(356,201		)
Distributions in excess of equity in earnings of affiliates	5,541			—			7,550			—			13,091
Net cash provided by (used in) investing activities	175,644			(400,105		)	(203,214		)	(189,500		)	(617,175		)
Cash flows from financing activities:
Debt issuance costs	(9,037		)	—			(2,828		)	—			(11,865		)
Borrowings on credit facilities	575,000			—			353,474			—			928,474
Principal payments on credit facilities and other obligations	(321,500		)	—			(272,903		)	—			(594,403		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			210,226			—			210,226
Distributions to noncontrolling interests	—			—			(11,458		)	—			(11,458		)
Proceeds from warrant exercises	225			—			—			—			225
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(371		)	—			—			—			(371		)
Dividends paid	(16,387		)	—			—			—			(16,387		)
Intercompany borrowings (advances), net	(432,703		)	383,681			(154,107		)	203,129			—
Net cash provided by (used in) financing activities	(204,773		)	383,681			122,404			203,129			504,441
Effect of exchange rate changes on cash and cash equivalents	—			—			904			—			904
Change in cash and cash equivalents	(9,412		)	—			(5,709		)	(190		)	(15,311		)
Cash and cash equivalents at beginning of period	19,123			—			63,844			(2,938		)	80,029
Cash and cash equivalents at end of period	$	9,711		$	—		$	58,135		$	(3,128	)	$	64,718

Page 44

SEMGROUP CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS, Continued

	Nine Months Ended September 30, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by (used in) operating activities	$	(4,374	)	$	11,105		$	58,353		$	(13,326	)	$	51,758
Cash flows from investing activities:
Capital expenditures	(1,621		)	(41,706		)	(38,796		)	—			(82,123		)
Proceeds from sale of long-lived assets	—			12			335			—			347
Investments in non-consolidated subsidiaries	(1,740		)	(62,464		)	205			—			(63,999		)
Proceeds from the sale of non-consolidated affiliate	—			—			3,500			—			3,500
Distributions in excess of equity in earnings of affiliates	5,062			—			5,507			—			10,569
Net cash provided by (used in) investing activities	1,701			(104,158		)	(29,249		)	—			(131,706		)
Cash flows from financing activities:
Debt issuance costs	(455		)	—			(239		)	—			(694		)
Borrowings on credit facilities	184,000			—			76,500			—			260,500
Principal payments on credit facilities and other obligations	(76,500		)	—			(102,501		)	—			(179,001		)
Distributions to noncontrolling interests	—			—			(5,754		)	—			(5,754		)
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(242		)	—			—			—			(242		)
Intercompany borrowing (advances), net	(98,381		)	93,053			(8,086		)	13,414			—
Net cash provided by (used in) financing activities	8,422			93,053			(40,080		)	13,414			74,809
Effect of exchange rate changes on cash and cash equivalents	—			—			(977		)	—			(977		)
Change in cash and cash equivalents	5,749			—			(11,953		)	88			(6,116		)
Change in cash and cash equivalents included in discontinued operations	—			—			(36		)	—			(36		)
Change in cash and cash equivalents from continuing operations	5,749			—			(11,989		)	88			(6,152		)
Cash and cash equivalents at beginning of period	111			—			76,264			(2,762		)	73,613
Cash and cash equivalents at end of period	$	5,860		$	—		$	64,275		$	(2,674	)	$	67,461

Page 45

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, 2012, filed with the SEC.

Overview of Business

We provide gathering, transportation, storage, distribution, marketing and other midstream services primarily to independent 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.”), Canada and the west coast of the United Kingdom (the “U.K.”). 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 in North American production and supply areas, including the Gulf Coast, Midwest, Rocky Mountain and Western Canadian regions. We maintain and operate storage, terminal and marine facilities at Milford Haven in 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 six primary business segments – Crude, SemStream^®, SemCAMS, SemLogistics, SemMexico, and SemGas^®.

Our Assets

Our assets include:

• a 51% ownership interest (34% directly and 17% indirectly, through our interest in Rose Rock Midstream, L.P. ("Rose Rock")) in White Cliffs Pipeline, L.L.C. ("White Cliffs"), which owns a 527-mile crude oil pipeline running from Platteville, Colorado to Cushing, Oklahoma (the "White Cliffs Pipeline"), that Crude operates;

• the 2% general partner interest and a 46.7% limited partner interest in Rose Rock, which owns an approximately 640-mile crude oil pipeline network in Kansas and Oklahoma and a crude oil storage facility in Cushing, Oklahoma with a capacity of 7.25 million barrels and an additional 0.35 million barrels currently under construction, and a 17% ownership interest in White Cliffs;

• 9.1 million common units of NGL Energy Partners LP (“NGL Energy”) and a 11.78% interest in NGL Energy Holdings LLC, the general partner of NGL Energy;

• approximately 1,790 miles of natural gas and NGL transportation, gathering and distribution pipelines in Kansas, Oklahoma, Texas and Alberta, Canada;

• 8.7 million barrels of owned multi-product storage capacity located in the U.K.;

• 12 liquid asphalt cement terminals and modification facilities and two emulsion distribution terminals in Mexico;

• majority ownership interests in four natural gas processing plants in Alberta, Canada, with combined operating capacity of 694 million cubic feet per day;

• three natural gas processing plants in the U.S., with 188 million cubic feet per day of capacity; and

• a crude oil trucking fleet of over 130 transport trucks and 150 trailers.

We believe that the variety of our petroleum product assets creates opportunities for us and our customers that avoid seasonal fluctuations of a less diverse business.

Recent Developments

On November 11, 2013, we announced our intent to pursue an agreement with Rose Rock to sell an additional one-third interest in SCPL. Following the proposed transaction, we will directly own a one-third interest in SCPL representing a 17% interest in White Cliffs. The transaction is subject to execution of an agreement between the two parties, review and recommendation by the conflicts committee of the general partner of Rose Rock, and the approval of the two company's boards of directors. The transaction is expected to close by year-end.

On November 6, 2013, we declared a dividend of $0.21 per share payable on December 3, 2013 to shareholders of record on November 22, 2013.

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Results of Operations

Consolidated Results of Operations

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2013			2012			2013			2012
Revenue	$	357,748		$	277,852		$	969,688		$	921,660
Expenses
Costs of products sold	255,554			189,830			680,632			651,283
Operating	52,360			52,367			162,813			172,750
General and administrative	20,952			16,680			54,887			53,073
Depreciation and amortization	16,113			12,081			41,563			35,687
Loss (gain) on disposal of long-lived assets, net	408			(3,615		)	(130		)	(3,496		)
Total expenses	345,387			267,343			939,765			909,297
Earnings from equity method investments	7,483			3,116			39,689			22,903
Operating income	19,844			13,625			69,612			35,266
Other expense
Interest expense	9,080			1,992			15,971			7,763
Other expense, net	4,214			9,709			35,798			17,141
Total other expenses, net	13,294			11,701			51,769			24,904
Income from continuing operations before income taxes	6,550			1,924			17,843			10,362
Income tax expense (benefit)	3,413			2,091			(41,305		)	985
Income (loss) from continuing operations	3,137			(167		)	59,148			9,377
Income (loss) from discontinued operations, net of income taxes	(2		)	(265		)	65			(456		)
Net income (loss)	$	3,135		$	(432	)	$	59,213		$	8,921

Revenue and Expenses

Revenue and expenses before intercompany eliminations leading to operating income are analyzed by operating segment below.

Interest expense

Interest expense increased in the three months ended September 30, 2013 to $9.1 million from $2.0 million in the three months ended September 30, 2012. Interest expense increased in the nine months ended September 30, 2013 to $16.0 million from $7.8 million in the nine months ended September 30, 2012. The increase in interest expense for all periods presented is due to the increase in the outstanding debt balance to $540.1 million at September 30, 2013 from $191.7 million at September 30, 2012. The increase in total outstanding debt is primarily attributable to the issuance of $300 million of 7.5% senior notes in the second quarter of 2013. Also contributing to the increase in total outstanding debt is an increase in the revolver balance at Rose Rock of $85.0 million related to the drop down of a one-third interest in SemCrude Pipeline, LLC in the first quarter of 2013.

Other expense, net

Other expense was $4.2 million for the three months ended September 30, 2013, compared to other expense of $9.7 million for the same period in 2012. Other expense was $35.8 million for the nine months ended September 30, 2012, compared to other expense of $17.1 million for the same period in 2012. Other expense for all periods presented was comprised primarily of losses due to the change in the fair value of our outstanding warrants.

Income tax expense (benefit)

The effective tax rate was 52% and 109% for the three months ended September 30, 2013 and 2012, respectively, and (231)% and 10% for the nine months ended September 30, 2013 and 2012, respectively. The rate for the three months ended September 30, 2013 is impacted by a $3.3 million discrete deferred tax benefit resulting from enactment of U.K. tax rate reductions for future periods. Significant items that impacted the effective tax rate for each period, as compared to the U.S.

Page 47

federal statutory rate of 35%, include earnings in foreign jurisdictions taxed at lower rates, a noncontrolling interest in Rose Rock for which taxes are not provided, warrant expense which is not deductible for tax purposes, and the impact of the valuation allowance or release recorded against our deferred tax assets. 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. Deferred tax liabilities, with the exception of those related to certain long-lived assets, have been considered as a source of future taxable income in establishing the amount of the valuation allowance. These combined factors, and the magnitude of 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

	Three Months Ended September 30,					Nine Months Ended September 30,
(in thousands)	2013		2012			2013			2012
Revenue	$	181,831	$	131,616		$	514,485		$	468,748
Expenses
Costs of products sold	157,550		111,790			446,507			412,847
Operating	9,098		6,042			20,527			17,957
General and administrative	3,360		5,015			10,778			9,796
Depreciation and amortization	4,130		3,066			11,327			9,032
Gain on disposal	—		(3,500		)	(25		)	(3,444		)
Total expenses	174,138		122,413			489,114			446,188
Equity earnings in White Cliffs	10,771		10,021			31,861			25,053
Operating income	$	18,464	$	19,224		$	57,232		$	47,613

Three months ended September 30, 2013 versus three months ended September 30, 2012

Revenue

Revenue increased in the three months ended September 30, 2013 to $182 million from $132 million in the three months ended September 30, 2012, as shown in the following table:

	Three Months Ended September 30,
	2013			2012
	(in thousands)
Gross product revenue	$	714,391		$	565,595
ASC 845-10-15	(548,805		)	(445,791		)
Unrealized gain on derivatives, net	464			554
Product revenue	166,050			120,358
Service revenue	15,781			11,196
Other	—			62
Total revenue	$	181,831		$	131,616

Gross product revenue increased in the three months ended September 30, 2013 to $714 million from $566 million in the three months ended September 30, 2012. The increase was primarily a result of an increase in sales volumes to 6.8 million barrels for the three months ended September 30, 2013, from 6.2 million barrels for the same period in 2012, combined with an increase in the average sales price of crude oil to $105 per barrel for the three months ended September 30, 2013, from $91 per barrel for the same period in 2012. The increase in volume relates primarily to increased buy/sell and marketing activity as a result of new crude oil production around our assets and directed efforts to maximize the use of those assets.

ASC 845-10-15, “Nonmonetary Transactions,” requires 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, but has no effect on operating income (loss). However, changes in the level of such purchase and sale activity between periods can have an effect on the comparison between those periods. Gross

Page 48

product revenue was reduced by $549 million and $446 million during the three months ended September 30, 2013 and 2012, respectively, in accordance with ASC 845-10-15.

Service revenue increased in the three months ended September 30, 2013 to $16 million from $11 million for the three months ended September 30, 2012, due to the newly acquired trucking fleet and fees on Cushing crude oil storage which averaged 7.25 million barrels in the third quarter of 2013 compared to an average of 7.0 million barrels in the same period of 2012, as well as additional truck unloading and pumpover fees.

Costs of products sold

Costs of products sold increased to $158 million in the three months ended September 30, 2013 from $112 million for the three months ended September 30, 2012. Costs of products sold were reduced by $549 million and $446 million in the three months ended September 30, 2013 and 2012, respectively, in accordance with ASC 845-10-15. An increase in the volume sold and an increase in the average cost of crude oil per barrel to $103 from $89 per barrel were equally offset by a higher proportion of transactions subject to ASC 845-10-15.

Adjusted gross margin

We view Adjusted gross margin as an important performance measure of the core profitability of our operations, as well as our operating performance as compared to that of other companies in our industry, without regard to financing methods, historical costs basis, capital structure or the impact of fluctuating commodity prices. We define Adjusted gross margin as total revenues minus cost of products sold and unrealized gain (loss) on derivatives. Adjusted gross margin allows us to make a meaningful comparison of the operating results between our fee-based activities, which do not involve the purchase or sale of petroleum products, and our fixed-margin and marketing operations, which do. In addition, Adjusted gross margin allows us to make a meaningful comparison of the results of our fixed-margin and marketing operations across different commodity price environments because it measures the spread between the product sales price and costs of products sold.

Because Adjusted gross margin may be defined differently by other companies in our industry, our definition may not be comparable to similarly titled measures of other companies.

The following table shows the Adjusted gross margin generated by our fee-based services, our fixed-margin transactions and our marketing activities for the three months ended September 30, 2013 and 2012 (in thousands):

Three Months Ended September 30, 2013	Storage		Transportation		Marketing Activities		Other(1)		Total
Revenues	$	8,628	$	7,297	$	162,790	$	3,116	$	181,831
Less: Costs of products sold, exclusive of depreciation and amortization	—		—		157,550		—		157,550
Less: Unrealized gain on derivatives	—		—		464		—		464
Adjusted gross margin	$	8,628	$	7,297	$	4,776	$	3,116	$	23,817

Three Months Ended September 30, 2012	Storage		Transportation		Marketing Activities		Other(1)		Total
Revenues	$	8,367	$	4,768	$	116,318	$	2,163	$	131,616
Less: Costs of products sold, exclusive of depreciation and amortization	—		—		111,790		—		111,790
Less: Unrealized gain on derivatives	—		—		554		—		554
Adjusted gross margin	$	8,367	$	4,768	$	3,974	$	2,163	$	19,272

(1) This category includes fee-based services such as unloading and ancillary storage terminal services.

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 September 30,
	2013		2012
	(in thousands)
Reconciliation of operating income to Adjusted gross margin:
Operating income	$	18,464	$	19,224
Add:
Operating expense	9,098		6,042
General and administrative expense	3,360		5,015
Depreciation and amortization expense	4,130		3,066
Gain on disposal	—		(3,500		)
Less:
Unrealized gain on derivatives	464		554
Earnings from equity method investment	10,771		10,021
Adjusted gross margin	$	23,817	$	19,272

Operating expense

Operating expense increased to $9 million in the three months ended September 30, 2013, from $6 million for the three months ended September 30, 2012. Approximately $2.8 million of the increase is attributable to the newly acquired trucking fleet, along with increases in field expense and insurance of approximately $0.3 million and $0.4 million, respectively. These increases are partially offset by pipeline construction management fees received of approximately $0.5 million.

General and administrative

General and administrative expense decreased in the three months ended September 30, 2013, to $3 million from $5 million for the three months ended September 30, 2012. This decrease is primarily due to a reduction in corporate overhead allocations.

Earnings from equity method investment

Crude’s equity method investments are in White Cliffs and Glass Mountain. Earnings from White Cliffs increased in the three months ended September 30, 2013, to $11 million from $10 million in the three months ended September 30, 2012. This increase is due primarily to a 17% increase in the crude oil volume shipped from Platteville, CO to Cushing, OK. The Glass Mountain Pipeline is still under construction.

Nine months ended September 30, 2013 versus nine months ended September 30, 2012

Revenue

Revenue increased in the nine months ended September 30, 2013 to $514 million from $469 million in the nine months ended September 30, 2012, as shown in the following table:

	Nine Months Ended September 30,
	2013			2012
	(in thousands)
Gross product revenue	$	1,971,729		$	1,538,805
ASC 845-10-15	(1,499,894		)	(1,103,424		)
Unrealized gain on derivatives, net	1,759			432
Product revenue	473,594			435,813
Service revenue	40,891			32,932
Other	—			3
Total revenue	$	514,485		$	468,748

Gross product revenue increased in the nine months ended September 30, 2013, to $2.0 billion from $1.5 billion in the nine months ended September 30, 2012. The increase was primarily a result of an increase in sales volumes to 20.3 million barrels for the nine months ended September 30, 2013, from 16.4 million barrels for the same period in 2012, and an increase

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in the average sales price of crude oil to $97 per barrel for the nine months ended September 30, 2013 from $94 per barrel for the same period in 2012.

ASC 845-10-15, “Nonmonetary Transactions,” requires 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, but has no effect on operating income. However, changes in the level of such purchase and sale activity between periods can have an effect on the comparison between those periods. Gross product revenue was reduced by $1.5 billion and $1.1 billion during the nine months ended September 30, 2013 and 2012, respectively, in accordance with ASC 845-10-15.

Service revenue increased in the nine months ended September 30, 2013, to $41 million from $33 million for the nine months ended September 30, 2012, due to the newly acquired trucking fleet and fees on Cushing crude oil storage as well as additional truck unloading and pumpover fees.

Costs of products sold

Costs of products sold increased in the nine months ended September 30, 2013, to $447 million from $413 million for the same period in 2012. Costs of products sold were reduced by $1.5 billion and $1.1 billion in the nine months ended September 30, 2013 and 2012, respectively, in accordance with ASC 845-10-15. Costs of products sold increased in the nine months ended September 30, 2013, primarily as a result of an increase in the volume sold and an increase in the average cost of crude oil per barrel to $95 from $93 per barrel for the same period in 2012.

Adjusted gross margin

We view Adjusted gross margin as an important performance measure of the core profitability of our operations, as well as our operating performance as compared to that of other companies in our industry, without regard to financing methods, historical costs basis, capital structure or the impact of fluctuating commodity prices. We define Adjusted gross margin as total revenues minus cost of products sold and unrealized gain (loss) on derivatives. Adjusted gross margin allows us to make a meaningful comparison of the operating results between our fee-based activities, which do not involve the purchase or sale of petroleum products, and our fixed-margin and marketing operations, which do. In addition, Adjusted gross margin allows us to make a meaningful comparison of the results of our fixed-margin and marketing operations across different commodity price environments because it measures the spread between the product sales price and costs of products sold.

Because Adjusted gross margin may be defined differently by other companies in our industry, our definition may not be comparable to similarly titled measures of other companies.

The following table shows the Adjusted gross margin generated by our fee-based services, our fixed-margin transactions and our marketing activities for the nine months ended September 30, 2013 and 2012 (in thousands):

Nine Months Ended September 30, 2013	Storage		Transportation		Marketing Activities		Other(1)		Total
Revenues	$	25,624	$	18,721	$	460,661	$	9,479	$	514,485
Less: Costs of products sold, exclusive of depreciation and amortization	—		—		446,507		—		446,507
Less: Unrealized gain on derivatives	—		—		1,759		—		1,759
Adjusted gross margin	$	25,624	$	18,721	$	12,395	$	9,479	$	66,219

Nine Months Ended September 30, 2012	Storage		Transportation		Marketing Activities		Other(1)		Total
Revenues	$	24,205	$	13,425	$	425,439	$	5,679	$	468,748
Less: Costs of products sold, exclusive of depreciation and amortization	—		—		412,847		—		412,847
Less: Unrealized gain on derivatives	—		—		432		—		432
Adjusted gross margin	$	24,205	$	13,425	$	12,160	$	5,679	$	55,469

(1) This category includes fee-based services such as unloading and ancillary storage terminal services.

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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	Nine Months Ended September 30,
	2013			2012
	(in thousands)
Reconciliation of operating income to Adjusted gross margin:
Operating income	$	57,232		$	47,613
Add:
Operating expense	20,527			17,957
General and administrative expense	10,778			9,796
Depreciation and amortization expense	11,327			9,032
Gain on disposal	(25		)	(3,444		)
Less:
Unrealized gain (loss) on derivatives	1,759			432
Earnings from equity method investment	31,861			25,053
Adjusted gross margin	$	66,219		$	55,469

Operating expense

Operating expense increased in the nine months ended September 30, 2013, to $21 million from $18 million for the nine months ended September 30, 2012. Approximately $2.8 million of this increase is attributable to the newly acquired trucking fleet, along with field expense and insurance increases of approximately $0.8 million and $0.5 million, respectively. These increases are partially offset by pipeline construction management fees received and a bad debt recovery of approximately $1.3 million and $0.2 million, respectively.

General and administrative

General and administrative expense increased in the nine months ended September 30, 2013, to $11 million from $10 million for the nine months ended September 30, 2012, as a result of increased professional fees and employment costs.

Earnings from equity method investment

Crude’s equity method investments are in White Cliffs and Glass Mountain. Earnings from White Cliffs increased in the nine months ended September 30, 2013, to $32 million from $25 million in the nine months ended September 30, 2012. This increase is due primarily to a 26% increase in the crude oil volume shipped from Platteville, CO to Cushing, OK. The Glass Mountain Pipeline is still under construction.

SemStream

On November 1, 2011, we contributed the primary operating assets of our SemStream segment to NGL Energy. We did not, however, contribute any of the assets or liabilities of SemStream’s Arizona residential business to NGL Energy. On September 12, 2012, we entered into a definitive agreement to sell those assets and liabilities. This sale was subject to approval by the Arizona Corporation Commission and closed on December 31, 2012, after that approval was granted; therefore, 2012 results are reported as discontinued operations. The results of operations shown below for 2013 reflect only corporate overhead allocations, minor adjustments and the earnings from our equity method investment in NGL Energy. We include our share of NGL Energy’s earnings on a one-quarter lag because we do not receive their financial statements in sufficient time to apply the equity method to the current period.

For additional information about NGL Energy's results for the quarter ended June 30, 2013, see the NGL Energy Form 10-Q for such period filed with the SEC.

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	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2013			2012			2013		2012
Revenue	$	—		$	—		$	—	$	7
Expenses
Costs of products sold	—			—			—		33
Operating	—			7			1		(18		)
General and administrative	114			528			430		582
Depreciation and amortization	—			—			—		—
Loss on disposal	—			—			6		—
Total expenses	114			535			437		597
Equity earnings in NGL Energy	(3,288		)	(6,905		)	7,828		(2,150		)
Operating income (loss)	$	(3,402	)	$	(7,440	)	$	7,391	$	(2,740	)

SemLogistics

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2013			2012			2013			2012
Revenue	$	2,169		$	2,213		$	7,827		$	8,610
Expenses
Costs of products sold	—			97			—			196
Operating	1,616			1,436			5,303			4,521
General and administrative	1,679			990			4,285			4,249
Depreciation and amortization	2,334			2,388			6,987			7,040
Total expenses	5,629			4,911			16,575			16,006
Operating loss	$	(3,460	)	$	(2,698	)	$	(8,748	)	$	(7,396	)

Three months ended September 30, 2013 versus three months ended September 30, 2012

Revenue

Revenue remained flat at $2 million in the three months ended September 30, 2013 and 2012.

High crude oil prices and backwardated market conditions (i.e., prices for future deliveries are lower than current prices) exist today and are forecast to continue through the remainder of 2013. These factors have a negative effect on storage economics. As a result, the demand for storage is depressed and we have experienced difficulty securing contract renewals and replacement of long-term contracts.

We are uncertain when market conditions will improve. However, we believe that geographical imbalances between the production and consumption of crude oil and related refined products will require physical transportation and, as a result, bulk liquid storage must play a key role in the supply chain. This creates a demand for storage which is independent of current crude oil prices, forward price curves and the entire speculative trading environment.

Storage economics have been unfavorable for some time. We will continue to monitor this situation and recognize the possibility that an impairment of the long-lived assets may be required in the near term.

General

In every category of expense, the amounts for the third quarter of 2013 are roughly equivalent to those of the third quarter of 2012. General and administrative expense for 2012 included a credit of approximately $500 thousand related to a reduction of allocated corporate costs as a result of a transfer pricing study in 2012. There was no such adjustment in 2013.

Nine months ended September 30, 2013 versus nine months ended September 30, 2012

Revenue

Revenue decreased by $783 thousand in the nine months ended September 30, 2013, compared to the nine months ended September 30, 2012.

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The decline in revenue is a result of a decline in storage rates offset, in part, by an increase in the volume of storage leased. In addition, we had product sales of $425 thousand in 2012, but no such sales in 2013. The decline in revenue was offset, in part, by an increase in fees for ancillary terminal services.

High crude oil prices and backwardated market conditions (i.e., prices for future deliveries are lower than current prices) exist today and are forecast to continue through the remainder of 2013. These factors have a negative effect on storage economics. As a result, the demand for storage is depressed and we have experienced difficulty securing contract renewals and replacement of long-term contracts.

We are uncertain when market conditions will improve. However, we believe that geographical imbalances between the production and consumption of crude oil and related refined products will require physical transportation and, as a result, bulk liquid storage must play a key role in the supply chain. This creates a demand for storage which is independent of current crude oil prices, forward price curves and the entire speculative trading environment.

Storage economics have been unfavorable for some time. We will continue to monitor this situation and recognize the possibility that an impairment of the long-lived assets may be required in the near term.

Operating

Operating expense increased in the nine months ended September 30, 2013, by $782 thousand compared to the nine months ended September 30, 2012. This increase is due to increases in maintenance expenses.

SemCAMS

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2013		2012		2013		2012
Revenue	$	48,979	$	54,301	$	151,219	$	169,149
Expenses
Costs of products sold	106		309		290		499
Operating	33,980		40,081		116,372		135,165
General and administrative	3,446		3,354		10,933		10,404
Depreciation and amortization	2,631		2,664		7,925		7,910
Total expenses	40,163		46,408		135,520		153,978
Operating income	$	8,816	$	7,893	$	15,699	$	15,171

Three months ended September 30, 2013 versus three months ended September 30, 2012

Revenue

Revenue in the three months ended September 30, 2013, decreased to $49 million from $54 million for the three months ended September 30, 2012. This decrease was due primarily to lower flow through expenses and overhead recovery related to turnaround activities of $10.8 million and $1.0 million, respectively, and foreign exchange loss of $2.2 million. This decrease was offset, in part, by higher flow through expenses related to operating costs of $6.2 million, $1.8 million due to higher volumes processed and maintenance capital recovery fees of $0.8 million.

Operating expense

Operating expense in the three months ended September 30, 2013, decreased to $34 million from $40 million for the three months ended September 30, 2012. This decrease was due primarily to lower expenses related to turnaround activities of $10.8 million and foreign exchange gain of $1.5 million. This decrease was offset, in part, by higher contract services costs of $2.3 million, operating incentive costs of $1.3 million and higher materials and chemicals costs of $1.1 million.

Nine months ended September 30, 2013 versus nine months ended September 30, 2012

Revenue

Revenue in the nine months ended September 30, 2013, decreased to $151 million from $169 million for the nine months ended September 30, 2012. This decrease was due primarily to lower flow through expenses and overhead recovery

Page 54

related to turnaround activities of $33.6 million and $2.6 million, respectively, and foreign exchange loss of $2.5 million. This decrease was offset, in part, by higher flow through expenses related to operating costs of $15.0 million, $3.4 million due to higher volumes processed and maintenance capital recovery fees of $2.6 million.

Operating expense

Operating expense in the nine months ended September 30, 2013, decreased to $116 million from $135 million for the nine months ended September 30, 2012. This decrease was due primarily to lower expenses related to turnaround activities of $33.6 million and foreign exchange gain of $1.7 million. This decrease was offset, in part, by higher contract services costs of $5.9 million, higher power costs of $4.9 million, operating incentive costs of $3.5 million and higher materials and chemicals costs of $1.4 million.

SemMexico

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2013			2012			2013			2012
Revenue	$	65,549		$	62,095		$	160,375		$	193,229
Expenses
Costs of products sold	56,070			55,817			138,372			174,636
Operating	2,230			1,870			6,741			6,033
General and administrative	2,510			1,501			7,175			6,730
Depreciation and amortization	1,529			1,536			4,467			4,614
Gain on disposal	(271		)	(112		)	(784		)	(49		)
Total expenses	62,068			60,612			155,971			191,964
Operating income	$	3,481		$	1,483		$	4,404		$	1,265

Three months ended September 30, 2013 versus three months ended September 30, 2012

Revenue

Revenue increased in the three months ended September 30, 2013, to $66 million from $62 million in the three months ended September 30, 2012. The increase was primarily the result of an increase in sales volumes to 96,050 metric tons for the three months ended September 30, 2013, from 88,125 metric tons for the same period in 2012 offset, in part, by a decrease in the average sale price per metric ton to $670 in 2013 compared to $697 per metric ton in 2012. The increase in volume is a result of a higher demand for value added products, e.g., modified asphalt cement, modified asphalt emulsion and asphalt emulsion. The decrease in average sales price per metric ton is due to an industry-wide drop in asphalt prices in 2013 which are based on Pemex's posted prices for base stock.

Costs of products sold

Costs of products sold remained flat in the three months ended September 30, 2013 and 2012 at $56 million. On a per unit basis, the cost of products sold decreased to $583 per metric ton in the three months ended September 30, 2013, from $633 per metric ton for the same period in 2012.

General and administrative

General and administrative expense increased in the three months ended September 30, 2013, to $3 million from $2 million in the three months ended September 30, 2012. Expenses in 2012 included a $600 thousand reduction to allocated corporate costs as a result of a transfer pricing study in 2012. There was no such adjustment in 2013. In addition, incentive compensation is approximately $360 thousand higher in 2013 compared to 2012.

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Nine months ended September 30, 2013 versus nine months ended September 30, 2012

Revenue

Revenue decreased in the nine months ended September 30, 2013, to $160 million from $193 million in the nine months ended September 30, 2012. The decrease was primarily the result of a decrease in sales volume to 229,236 metric tons for the nine months ended September 30, 2013, from 275,932 metric tons for the same period in 2012. In addition, the average sales price per metric ton dropped to $687 in 2013 compared to $692 per metric ton in 2012. The decline in volume is a result of a slowdown in federal government spending on infrastructure projects in Mexico. The decrease in average sales price per metric ton is due to an industry-wide drop in asphalt prices in 2013 which are based on Pemex's posted prices for base stock.

Costs of products sold

Costs of products sold decreased in the nine months ended September 30, 2013, to $138 million from $175 million in the nine months ended September 30, 2012, and includes an insurance recovery of $685 thousand related to an inventory shrinkage reported in the second quarter of 2012. On a per unit basis, the cost of products sold decreased to $604 per metric ton from $633 per metric ton.

Operating

Operating expense increased in the nine months ended September 30, 2013, to $7 million from $6 million in the nine months ended September 30, 2012. This increase is due primarily to fuel and electricity costs which were approximately $500 thousand higher in 2013 compared to 2012.

SemGas

	Three Months Ended September 30,					Nine Months Ended September 30,
(in thousands)	2013		2012			2013		2012
Revenue	$	65,795	$	29,878		$	151,460	$	89,452
Expenses
Costs of products sold	48,403		24,068			111,141		70,607
Operating	5,436		2,931			13,869		9,092
General and administrative	1,923		1,329			5,112		4,564
Depreciation and amortization	4,992		1,797			9,353		5,153
Loss (gain) on disposal	679		(3		)	673		(3		)
Total expenses	61,433		30,122			140,148		89,413
Operating income (loss)	$	4,362	$	(244	)	$	11,312	$	39

Three months ended September 30, 2013 versus three months ended September 30, 2012

Revenue

Revenue increased in the three months ended September 30, 2013, to $66 million from $30 million for the three months ended September 30, 2012. This increase is the result of higher sales volume (15,989 MMcf versus 8,627 MMcf) and higher sales price per unit ($4.12/Mcf versus $3.46/Mcf). The increase in volume is primarily a result of increased drilling and production in the area served by our gas plants in Hopeton and Nash, Oklahoma and the commissioning of a new 125 MMcf/day processing plant at Hopeton in June 2013.

Costs of products sold

Costs of products sold increased in the three months ended September 30, 2013, to $48 million from $24 million in the three months ended September 30, 2012. This increase is primarily related to higher volume and prices as described above.

Adjusted gross margin

We view Adjusted gross margin as an important performance measure of the core profitability of our operations, as well as our operating performance as compared to that of other companies in our industry, without regard to financing methods, historical costs basis, capital structure or the impact of fluctuating commodity prices. We define Adjusted gross margin as total revenues minus cost of products sold and unrealized gain (loss) on derivatives. Adjusted gross margin allows us to make a

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meaningful comparison of the operating results between our fee-based activities, which do not involve the purchase or sale of petroleum products, and our fixed-margin and marketing operations, which do. In addition, Adjusted gross margin allows us to make a meaningful comparison of the results of our fixed-margin and marketing operations across different commodity price environments because it measures the spread between the product sales price and costs of products sold.

Because Adjusted gross margin may be defined differently by other companies in our industry, our definition may not be comparable to similarly titled measures of other companies.

The following table shows the Adjusted gross margin generated in the three months ended September 30, 2013 and 2012.

	Three Months Ended September 30,
	2013		2012
	(in thousands)
Revenue	$	65,795	$	29,878
Less: Cost of products sold, exclusive of depreciation	48,403		24,068
Less: Unrealized gain (loss) on derivatives	—		—
Adjusted gross margin	$	17,392	$	5,810

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

	Three Months Ended September 30,
	2013		2012
	(in thousands)
Reconciliation of operating income (loss) to Adjusted gross margin:
Operating income (loss)	$	4,362	$	(244	)
Add:
Operating expense	5,436		2,931
General and administrative expense	1,923		1,329
Depreciation and amortization expense	4,992		1,797
Loss (gain) on disposal of long-lived assets	679		(3		)
Adjusted gross margin	$	17,392	$	5,810

Operating expense

Operating expense increased in the three months ended September 30, 2013, to $5 million from $3 million for the three months ended September 30, 2012. This increase is due primarily to higher outside services, field expenses (which includes materials and supplies, lubricants, water disposal, electricity and fuel), and equipment leases of approximately $1.6 million, $290 thousand and $250 thousand, respectively.

General and administrative

General and administrative expense increased in the three months ended September 30, 2013, to $2 million from $1 million in the three months ended September 30, 2012. This increase is due primarily to higher corporate allocations, incentive compensation and insurance of approximately $350 thousand, $130 thousand and $120 thousand, respectively.

Depreciation and amortization

Depreciation and amortization expense increased in the three months ended September 30, 2013, to $5 million from $2 million in the three months ended September 30, 2012. Depreciation increased by approximately $2.1 million between the periods reflecting the addition of approximately $229 million in property, plant and equipment. Amortization expense increased by approximately $1.2 million between the periods due to amortization of the intangible asset related to our twenty year contract with certain affiliates of Chesapeake and Sinopec.

Loss (gain) on disposal of long-lived assets

For the three months ended September 30, 2013, we recorded a loss on disposal of assets of $679 thousand compared to a negligible gain for the three months ended September 30, 2012. This loss is primarily the result of removal of certain equipment from our Hopeton, Oklahoma plant. This equipment will be relocated to our Sherman, Texas facility in 2014.

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Nine months ended September 30, 2013 versus nine months ended September 30, 2012

Revenue

Revenue increased in the nine months ended September 30, 2013, to $151 million from $89 million for the nine months ended September 30, 2012. This increase is the result of higher sales volume (35,791 MMcf versus 25,197 MMcf) and higher sales price per unit ($4.23/Mcf versus $3.55/Mcf). The increase in volume is primarily a result of increased drilling and production in the area served by our gas plants in Hopeton and Nash, Oklahoma and the commissioning of a new 125 MMcf/day processing plant at Hopeton in June 2013.

Costs of products sold

Costs of products sold increased in the nine months ended September 30, 2013, to $111 million from $71 million in the nine months ended September 30, 2012. This increase is primarily related to higher volume and prices as described above. A fuel cost adjustment in the second quarter of 2013 decreased the costs of products sold by $1.4 million. In addition, a contract adjustment in the first quarter of 2012, increased the costs of products sold by approximately $1.3 million.

Adjusted gross margin

We view Adjusted gross margin as an important performance measure of the core profitability of our operations, as well as our operating performance as compared to that of other companies in our industry, without regard to financing methods, historical costs basis, capital structure or the impact of fluctuating commodity prices. We define Adjusted gross margin as total revenues minus cost of products sold and unrealized gain (loss) on derivatives. Adjusted gross margin allows us to make a meaningful comparison of the operating results between our fee-based activities, which do not involve the purchase or sale of petroleum products, and our fixed-margin and marketing operations, which do. In addition, Adjusted gross margin allows us to make a meaningful comparison of the results of our fixed-margin and marketing operations across different commodity price environments because it measures the spread between the product sales price and costs of products sold.

Because Adjusted gross margin may be defined differently by other companies in our industry, our definition may not be comparable to similarly titled measures of other companies.

The following table shows the Adjusted gross margin generated in the nine months ended September 30, 2013 and 2012.

	Nine Months Ended September 30,
	2013		2012
	(in thousands)
Revenue	$	151,460	$	89,452
Less: Cost of products sold, exclusive of depreciation	111,141		70,607
Less: Unrealized gain (loss) on derivatives	—		—
Adjusted gross margin	$	40,319	$	18,845

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.

	Nine Months Ended September 30,
	2013		2012
	(in thousands)
Reconciliation of operating income to Adjusted gross margin:
Operating income	$	11,312	$	39
Add:
Operating expense	13,869		9,092
General and administrative expense	5,112		4,564
Depreciation and amortization expense	9,353		5,153
Loss (gain) on disposal of long-lived assets	673		(3		)
Adjusted gross margin	$	40,319	$	18,845

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Operating expense

Operating expense increased in the nine months ended September 30, 2013, to $14 million from $9 million for the nine months ended September 30, 2012. This increase is due primarily to higher outside services, field expenses (which includes materials and supplies, lubricants, water disposal, electricity and fuel), compressor rental, employee costs, incentive compensation and insurance costs of approximately $1.6 million, $1.4 million, $425 thousand, $400 thousand, $275 thousand and $200 thousand, respectively.

Depreciation

Depreciation and amortization expense increased in the nine months ended September 30, 2013, to $9 million from $5 million for the nine months ended September 30, 2012. Depreciation increased by approximately $3.1 million between the periods reflecting the addition of approximately $229 million in property, plant and equipment. Amortization expense increased by approximately $1.2 million between the periods due to amortization of the intangible asset related to our twenty year contract with Chesapeake.

Loss (gain) on disposal of long-lived assets

For the nine months ended September 30, 2013, we recorded a loss on disposal of assets of $673 thousand compared to a negligible gain for the nine months ended September 30, 2012. This loss is primarily the result of removal of certain equipment from our Hopeton, Oklahoma plant. This equipment will be relocated to our Sherman, Texas facility in 2014.

Other and Eliminations

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2013			2012			2013			2012
Revenue	$	(6,575	)	$	(2,251	)	$	(15,678	)	$	(7,535	)
Expenses
Costs of products sold	(6,575		)	(2,251		)	(15,678		)	(7,535		)
Operating	—			—			—			—
General and administrative	7,920			3,963			16,174			16,748
Depreciation and amortization	497			630			1,504			1,938
Total expenses	1,842			2,342			2,000			11,151
Operating loss	$	(8,417	)	$	(4,593	)	$	(17,678	)	$	(18,686	)

Other and Eliminations is not an operating segment. This table is included to permit the reconciliation of segment information to that of the consolidated Company.

Liquidity and Capital Resources

Sources and Uses of Cash

Our principal sources of short-term liquidity are cash generated from operations and borrowings under our revolving credit facilities. The consolidated cash balance on September 30, 2013 (including restricted cash) was approximately $98.9 million. Of this amount, approximately $46.4 million was held in Canada and may be subject to tax if transferred to the United States. Our restricted cash balance of $34.2 million includes $32.4 million which has been set aside for settlement of pre-petition claims. Potential sources of long-term liquidity include debt and equity securities. 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 distributions through existing cash and cash from operating activities;

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

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

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Our ability to meet our financing requirements and fund our planned capital expenditures will depend on our future operating performance, 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 limited partner units. 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 cash for the periods presented:

	Nine Months Ended September 30,
(in thousands)	2013			2012
Statement of cash flow data:
Cash flows provided by (used in):
Operating activities	$	96,519		$	51,758
Investing activities	(617,175		)	(131,706		)
Financing activities	504,441			74,809
Subtotal	(16,215		)	(5,139		)
Effect of exchange rate on cash and cash equivalents	904			(977		)
Change in cash and cash equivalents from continuing operations	(15,311		)	(6,116		)
Change in cash and cash equivalents included in discontinued operations	—			(36		)
Change in cash and cash equivalents	(15,311		)	(6,152		)
Cash and cash equivalents at beginning of period	80,029			73,613
Cash and cash equivalents at end of period	$	64,718		$	67,461

Operating Activities

The components of operating cash flows can be summarized as follows (in thousands):

	Nine Months Ended September 30,
(in thousands)	2013		2012
Net income	$	59,213	$	8,921
Non-cash expenses, net	33,226		54,129
Changes in operating assets and liabilities	4,080		(11,292		)
Net cash flows provided by operating activities	$	96,519	$	51,758

Non-cash expenses decreased $20.9 million to $33.2 millionfor the nine months ended September 30, 2013 from $54.1 million for the nine months ended September 30, 2012. This decrease is comprised primarily of a $45.7 millionincrease in deferred tax benefit, which is due to the release of a valuation allowance on our net operating loss carryforward deferred tax assets, a $19.9 millionincrease in expense on the change in the fair value of warrants due to increasing market prices, a $5.4 million increase in depreciation and amortization expense, a $3.4 milliondecrease in gain on disposal of long-lived assets and a $1.3 millionincrease due to net unrealized gain related to our derivative instruments. All other non-cash expenses for the nine months ended September 30, 2013 remained relatively comparable to the nine months ended September 30, 2012.

Changes in operating assets and liabilities for the nine months ended September 30, 2013 generated a net increase in operating cash flows of $4.1 million, consisting primarily of an increase of$50.6 millionin accounts payable and accrued liabilities driven primarily by Crude and SemGas operating activity, an increase of$31.0 millionin accounts receivable driven primarily by Crude segment operating activity, an increase of$14.0 millionin inventories primarily related to our Crude segment and an increase of$6.9 millionin receivables from affiliates.

Changes in operating assets and liabilities during the nine months ended September 30, 2012 generated a net decrease in operating cash flows of $11.3 million, consisting primarily of a decrease of$4.7 millionin restricted cash, an increase of

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$117.0 millionin accounts receivable, an increase of$1.8 millionin inventories, an increase of$97.6 millionin accounts payable and accrued liabilities, a decrease of$5.2 millionin payables to affiliates, a decrease of$4.5 millionin payables to prepetition creditors, a decrease of$8.4 million in other current assets, a decrease of$2.5 million in other assets, and an increase of$2.9 millionin other noncurrent liabilities. Prior year accounts receivable and accounts payable cash flows were largely driven by SemCAMS turnaround activity and commodity pricing.

Investing Activities

For the nine months ended September 30, 2013, we had net cash outflows of $617.2 million from investing activities, due primarily to $131.7 million of capital expenditures, $143.5 million in investments in non-consolidated subsidiaries, and our acquisitions of Mid-America Midstream Gas Services, L.L.C. and Barcas Field Services, LLC of $356.2 million, partially offset by investing cash inflows of $13.1 million in distributions in excess of equity in earnings of affiliates. Year to date capital expenditures primarily relate to Rose Rock's Cushing expansion projects, SemGas' Northern Oklahoma expansion projects and well connects and the Wattenberg Oil Trunkline. Investments in non-consolidated subsidiaries represents investments in Glass Mountain Pipeline, the White Cliffs pipeline expansion project, and our purchase of additional general partner interest in NGL Energy. Distributions in excess of equity earnings represent returns of our investments in White Cliffs and NGL Energy.

For the nine months ended September 30, 2012, we had net cash outflows of $131.7 million from investing activities, due primarily to $82.1 million of capital expenditures and $64.0 million in investments in non-consolidated subsidiaries, partially offset by net investing inflows of $10.6 million in distributions in excess of equity in earnings of affiliates.

Financing Activities

For the nine months ended September 30, 2013, we had net cash inflows of $504.4 million from financing activities, which related to borrowings on long-term debt of $928.5 million and $210.2 million in proceeds from the issuance of Rose Rock limited partner units, partially offset by principal payments of $594.4 million, debt issuance costs of $11.9 million due to issuance of notes and increases to revolver capacity, dividends paid of $16.4 million and distributions to non-controlling interests of $11.5 million. Borrowings on long term debt include $300 million of notes issued related to the recently completed acquisition of Mid-America Midstream Gas Services, L.L.C.

For the nine months ended September 30, 2012, we had net cash inflows of $74.8 million from financing activities, substantially all of which related to borrowings on long-term debt of $260.5 million, partially offset by principal payments on long-term debt of $179.0 million.

SemGroup Senior Unsecured Notes

On June 14, 2013, we completed an offering of $300 million of 7.50% senior unsecured notes due 2021 to certain initial purchasers, for resale to qualified institutional buyers. See Footnote 8 of the accompanying condensed consolidated financial statements for additional information.

SemGroup Revolving Credit Facility

At September 30, 2013, we had $155 million borrowings outstanding under our $500 million revolving credit facility. In addition, we had $4.5 million in outstanding letters of credit on that date. The maximum letter of credit capacity under this facility is $250 million.

On April 22, 2013, the credit agreement was amended to (i) permit the increase of the facility by up to an additional $300 million subject to satisfaction of certain conditions, (ii) remove the restriction limiting unsecured senior or subordinated indebtedness to $200 million, while establishing certain requirements for obtaining unsecured senior or subordinated indebtedness of $200 million or more and (iii) establish less restrictive leverage covenants.

On May 3, 2013, we elected to increase the credit facility capacity by $200 million, for a total capacity of $500 million. The facility can be increased by an additional $100 million. In connection with the increase, we recorded $2.2 million of capitalized loan fees which will be amortized over the remaining life of the facility.

The credit agreement includes customary affirmative and negative covenants. At September 30, 2013, we were in compliance with the terms of the credit agreement.

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Rose Rock Revolving Credit Facility

At September 30, 2013, Rose Rock had $85 million in cash borrowings outstanding under its $385 million revolving credit facility. There were $31.8 million in outstanding letters of credit.

On January 11, 2013, the credit facility capacity was increased to $385 million. On September 20, 2013, the credit agreement was amended to extend the agreement to September 20, 2018 and permit the increase of the facility by not more than $200 million, subject to certain conditions. The amended agreement allows Rose Rock to incur unsecured or subordinated debt without limitation, subject to certain conditions, and provides alternative financial performance covenants at Rose Rock's election after the issuance of $200 million or more unsecured or subordinated debt, in aggregate. Additionally, the interest rate and commitment fees related to the revolving facility were lowered.

Subsequent to the amendment, at Rose Rock's option, amounts borrowed under the credit agreement will bear interest at either the Eurodollar rate or an alternate base rate (“ABR”), plus, in each case, an applicable margin. The applicable margin will range from 1.75% to 3.00% in the case of a Eurodollar rate loan, and from 0.75% to 2.00% in the case of an ABR loan, in each case, based on a leverage ratio specified in the credit agreement. A commitment fee that ranges from 0.375% to 0.50%, depending on a leverage ratio specified in the credit agreement, is charged on any unused capacity of the revolving credit facility.

Additionally, the agreement requires Rose Rock to maintain a minimum ratio of consolidated EBITDA to consolidated cash interest expense at the end of any fiscal quarter, for the immediately preceding four quarter period, of 2.50 to 1.00 and a maximum ratio of consolidated net debt to consolidated EBITDA at the end of any fiscal quarter, for the immediately preceding four quarter period, of 5.00 to 1.00 (or 5.50 to 1.00 during a temporary period from the date of funding of the purchase price of certain acquisitions (as described in the credit facility) until the last day of the third fiscal quarter following such acquisitions).

Upon the initial incurrence of at least $200 million of unsecured debt, Rose Rock will have a one-time option to elect to comply with the ratio of consolidated EBITDA to consolidated cash interest expense and the ratio of consolidated net debt to consolidated EBITDA as detailed above or the following alternative covenants:

• a minimum ratio of consolidated EBITDA to consolidated cash interest expense at the end of any fiscal quarter, for the immediately preceding four quarter period, of 2.50 to 1.00;

• a maximum ratio of consolidated net debt to consolidated EBITDA at the end of any fiscal quarter, for the immediately preceding four quarter period, of 5.50 to 1.00;

• and a maximum ratio of senior secured debt to consolidated EBITDA of 3.50 to 1.00.

The credit facility includes a $75 million sub-limit for the issuance of letters of credit. The credit agreement includes customary affirmative and negative covenants and also restricts Rose Rock’s ability to make certain types of payments including cash distributions to unitholders, however, Rose Rock may make those distributions unless Rose Rock is in default under the credit agreement or the distribution could result in a default. At September 30, 2013, Rose Rock was in compliance with the terms of the credit agreement.

SemMexico Credit Facilities

At September 30, 2013, we had no borrowings outstanding under a 56 million Mexican pesos (U.S. $4.3 million at the September 30, 2013 exchange rate) SemMexico credit facility. During the third quarter, the facility was renewed and has a maturity date of July 2014. In addition, SemMexico also had 292.8 million Mexican pesos (U.S. $22.3 million at the September 30, 2013 exchange rate) in outstanding letters of credit. SemMexico had no outstanding borrowings under a 44 million Mexican pesos (U.S. $3.3 million at the September 30, 2013 exchange rate) credit facility which matures in June 2015. At September 30, 2013, we were in compliance with the terms of these facilities.

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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 December 2015.

Rose Rock has an effective shelf registration statement with the SEC that, subject to market conditions and its capital needs, allows Rose Rock to issue up to an aggregate of $500 million of debt or equity securities. In August 2013, Rose Rock used this shelf registration to sell 4.750 million common units representing limited partner interests for proceeds of $152.5 million, net of underwriting discounts and commissions of $6.4 million. This shelf registration expires in May 2016.

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.

We estimate that the capital expenditures for 2013 will be approximately $825 million (including amounts related to the recently completed acquisitions of Mid-America Midstream Gas Services, L.L.C. and Barcas Field Services, LLC), consisting of an estimated $795 million for strategic projects and $30 million for maintenance and regulatory projects. Projected capital spending for 2013 also includes investments in Glass Mountain and White Cliffs. During the nine months endedSeptember 30, 2013, we spent $132 million (cash basis) on capital projects, excluding capital contributions to affiliates 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.

Rose Rock Distributions

The table below shows cash distributions declared or paid during 2012 and 2013.

Quarter Ended	Record Date	Payment Date	Distribution Per Unit
December 31, 2011	February 3, 2012	February 13, 2012	$0.0670	*
March 31, 2012	May 7, 2012	May 15, 2012	$0.3725
June 30, 2012	August 6, 2012	August 14, 2012	$0.3825
September 30, 2012	November 5, 2012	November 14, 2012	$0.3925
December 31, 2012	February 4, 2013	February 14, 2013	$0.4025
March 31, 2013	May 6, 2013	May 15, 2013	$0.4300
June 30, 2013	August 5, 2013	August 14, 2013	$0.4400
September 30, 2013	November 5, 2013	November 14, 2013	$0.4500

* The cash distribution paid in the first quarter of 2012 was $0.0670 per unit. This prorated amount corresponds to the minimum quarterly cash distribution of $0.3625 per unit, or $1.45 per unit on an annualized basis. The proration period began on December 15, 2011, immediately after the closing date of our initial public offering, and continued through December 31, 2011. The distribution was paid on February 13, 2012 to all unitholders of record as of February 3, 2012.

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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 accounted for more than 10% of our total revenue for the three months ended September 30, 2013, at approximately 13%. Shell Trading (US) Company and Tesoro Refining and Marketing Company accounted for more than 10% of our total revenue for the nine months ended September 30,2013 at approximately 10% each. 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, 2012, although the value of product purchase commitments is less at September 30, 2013 than it was at September 30, 2012.

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 sale 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 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 September 30, 2013, such commitments included the following (volumes and dollars in thousands):

	Volume (Barrels)	Value
Fixed price purchases	202	$	20,324
Fixed price sales	330	$	34,749
Floating price purchases	18,016	$	1,781,247
Floating price sales	18,600	$	1,814,662

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 began in July 2011 and continues through June 2023, subsequent to the extension of the agreement in the second quarter of 2013. On September 30, 2013, approximately $25.8 thousand was due under the contract and the amount of future obligation is approximately $88.2 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 nine months ended September 30, 2013, the majority of SemGas’ revenues were generated from such contracts.

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, 2012.

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In addition, we have received preliminary independent appraisals of the assets acquired in the MMGS and Barcas acquisitions. The estimates of fair value recorded as of September 30, 2013, are subject to change and such changes could be material. We expect to complete this process prior to filing our Form 10-K for the year ending December 31, 2013.

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 natural gas liquids, crude oil and natural gas, (ii) interest rates and (iii) currency exchange rates. We may utilize 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 nine months ended September 30, 2013 and September 30, 2012 and the year ended December 31, 2012.

	Light Sweet Crude Oil Futures (Barrel)		Mont Belvieu (Non-LDH) Spot Propane (Gallon)		Henry Hub Natural Gas Futures (MMBtu)
Quarter Ended September 30, 2013
High	$	110.53	$	1.19	$	3.81
Low	$	97.99	$	0.86	$	3.23
High/Low Differential	$	12.54	$	0.33	$	0.58
Quarter Ended September 30, 2012
High	$	99.00	$	0.99	$	3.32
Low	$	83.75	$	0.79	$	2.61
High/Low Differential	$	15.25	$	0.20	$	0.71
Nine Months Ended September 30, 2013
High	$	110.53	$	1.19	$	4.41
Low	$	86.68	$	0.79	$	3.11
High/Low Differential	$	23.85	$	0.40	$	1.30
Nine Months Ended September 30, 2012
High	$	109.77	$	1.40	$	3.32
Low	$	77.69	$	0.71	$	1.91
High/Low Differential	$	32.08	$	0.69	$	1.41
Year Ended December 31, 2012
High	$	109.77	$	1.40	$	3.90
Low	$	77.69	$	0.71	$	1.91
High/Low Differential	$	32.08	$	0.69	$	1.99

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

Page 66

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.

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 $0.10 change in natural gas price results in approximately a $385 thousand impact to Adjusted gross margin.

• A $0.10 change in natural gas liquids prices (Conway and Mont Belvieu) results in approximately a $2.7 million impact to Adjusted gross margin.

• A $10.00 change in condensate price results in approximately a $3.4 million impact to Adjusted gross margin.

Additionally, based on our open derivative contracts at September 30, 2013, an increase in the applicable market price or prices for each derivative contract would result in a decrease in our crude oil sales revenues. Likewise, a decrease in the applicable market price or prices for each derivative contract would result in an increase in 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 contracts	130	$	725	$	(1,330	)	$	1,330	November 2013

Margin deposits or other credit support, including letters of credit, are generally required on derivative instruments utilized 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 utilize 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 utilize 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 September 30, 2013, an increase in these base rates of 1%, above the base rate floors, would increase our interest expense by $2.4 million per year.

The average interest rates presented below are based upon rates in effect at September 30, 2013 and December 31, 2012. 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 67

The following table summarizes our debt obligations:

Liabilities	September 30, 2013	December 31, 2012
Short-term debt - variable rate	$0.0 million	$0.0 million
Average interest rate	0.00%	0.00%
Long-term debt - variable rate	$240.0 million	$206.0 million
Average interest rate	4.90%	4.74%
Long-term debt - fixed rate	$300.0 million	$0.0 million
Fixed interest rate	7.50%	0.00%

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 generally translated using the average exchange rate during the reporting period.

A 10% change in the average exchange rate during the three and nine months ended September 30, 2013, would change operating income by $1.5 million and $3.1 million, respectively.

Page 68

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 September 30, 2013. 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 September 30, 2013, that have materially affected, or that are reasonably likely to materially affect, our internal control over financial reporting.

Page 69

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

For information regarding legal proceedings, see the discussion under the captions “Bankruptcy matters”, “Other matters” and “Environmental” in Note 9 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

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, 2012.

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

Warrant Exercises

Pursuant to our Plan of Reorganization, in 2009 we issued warrants to purchase shares of our Class A Common Stock, or at the election of the warrantholder, shares of our Class B Common Stock, to certain of our pre-petition creditors. For the quarter ended September 30, 2013, two holders exercised warrants to purchase an aggregate of 10,010 shares of our Class A Common Stock. Both of the holders elected to satisfy their obligation to pay the exercise price through "cashless exercise," whereby the number of shares to be issued to the holder is reduced, in lieu of a cash payment for the exercise price. Accordingly, 5,551 shares of our Class A Common Stock were issued pursuant to such exercises. Such issuances were exempt from the registration requirements of the Securities Act pursuant to Section 1145 of the U.S. Bankruptcy Code.

Item 3. Defaults Upon Senior Securities

None

Item 4. Mine Safety Disclosures

Not applicable

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:

Page 70

Exhibit Number	Description
2.1	First Amendment to Unit Purchase Agreement, dated as of July 31, 2013, by and between Chesapeake Midstream Development, L.L.C. and SemGas, L.P. (filed as Exhibit 2.2 to our current report on Form 8-K dated August 1, 2013, filed August 6, 2013, and incorporated herein by reference).
10.1	Second Amendment to the Credit Agreement and First Amendment to the Guarantee and Collateral Agreement, dated as of September 20, 2013, by and among Rose Rock Midstream, L.P., certain subsidiaries of Rose Rock Midstream, L.P., as guarantors, the lenders party thereto and The Royal Bank of Scotland plc, as administrative agent and collateral agent for the lenders (filed as Exhibit 10.1 to our current report on Form 8-K dated September 20, 2013, filed September 26, 2013, and incorporated herein by reference).
31.1	Rule 13a-14(a)/15d-14(a) Certification of Norman J. Szydlowski, 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 Norman J. Szydlowski, 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

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: November 12, 2013	SEMGROUP CORPORATION
	By:	/s/     Robert N. Fitzgerald
		Robert N. Fitzgerald
		Senior Vice President and
		Chief Financial Officer

Page 72

EXHIBIT INDEX

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

Exhibit Number	Description
2.1	First Amendment to Unit Purchase Agreement, dated as of July 31, 2013, by and between Chesapeake Midstream Development, L.L.C. and SemGas, L.P. (filed as Exhibit 2.2 to our current report on Form 8-K dated August 1, 2013, filed August 6, 2013, and incorporated herein by reference).
10.1	Second Amendment to the Credit Agreement and First Amendment to the Guarantee and Collateral Agreement, dated as of September 20, 2013, by and among Rose Rock Midstream, L.P., certain subsidiaries of Rose Rock Midstream, L.P., as guarantors, the lenders party thereto and The Royal Bank of Scotland plc, as administrative agent and collateral agent for the lenders (filed as Exhibit 10.1 to our current report on Form 8-K dated September 20, 2013, filed September 26, 2013, and incorporated herein by reference).
31.1	Rule 13a-14(a)/15d-14(a) Certification of Norman J. Szydlowski, 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 Norman J. Szydlowski, 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 73

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Norman J. Szydlowski, 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: November 12, 2013

/s/ Norman J. Szydlowski

Norman J. Szydlowski

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: November 12, 2013

/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 September 30, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Norman J. Szydlowski, 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: November 12, 2013

/s/ Norman J. Szydlowski

Norman J. Szydlowski

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 September 30, 2013, 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: November 12, 2013

/s/ Robert N. Fitzgerald

Robert N. Fitzgerald

Senior Vice President and

Chief Financial Officer

XML

Acquisition Acquisition (Details Textual) (USD $)	9 Months Ended			9 Months Ended		9 Months Ended				3 Months Ended		0 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Mid-America Midstream Gas Services, L.L.C. [Member]	Aug. 01, 2013 Mid-America Midstream Gas Services, L.L.C. [Member] acre mi	Sep. 30, 2013 Mid-America Midstream Gas Services, L.L.C. [Member] Gathering and processing agreement [Member]	Aug. 01, 2013 Mid-America Midstream Gas Services, L.L.C. [Member] Gathering and processing agreement [Member]	Sep. 30, 2013 Barcas Field Services, LLC [Member]	Sep. 01, 2013 Barcas Field Services, LLC [Member] Trucks Trailers	Aug. 01, 2013 Rose Valley I plant [Member] Mid-America Midstream Gas Services, L.L.C. [Member] MMcf	Aug. 01, 2013 Rose Valley II plant [Member] Mid-America Midstream Gas Services, L.L.C. [Member] MMcf	Sep. 30, 2013 General Partner [Member] NGL Energy Partners LP [Member]	Mar. 31, 2013 General Partner [Member] NGL Energy Partners LP [Member]	Aug. 08, 2013 General Partner [Member] NGL Energy Partners LP [Member] Additional GP ownership acquired [Member]
Acquisition [Line Items]
Goodwill, Amortization Period	15 years
Payments to Acquire Businesses, Gross		$ 316,147,000				$ 49,969,000
Business Combination, Acquisition Related Costs		3,600,000
Length Of Pipeline Network			200
Processing Capacity								200	200
Net Acre Dedication Acquired			540,000
Contract tenor					20 years
Percentage of contract which is fee based				100.00%
Future Capital Expenditures Related to Acquisition			$ 125,000,000
Trucks purchased							114
Trailers purchased							120
General Partner Ownership Interest										11.78%	11.78%	5.36%

XML

Condensed Consolidating Guarantor Financial Statements Condensed Consolidating Guarantor Financial Statements (Details Textual) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Senior Notes	$ 300,000	$ 0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Equity Method Investment, Ownership Percentage	100.00%
Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Semcrude Pipeline [Member]
Condensed Financial Statements, Captions [Line Items]
Equity Method Investment, Ownership Percentage	33.00%

XML

Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2013

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):

	Nine Months Ended September 30,
	2013			2012
Decrease (increase) in restricted cash	$	451		$	4,691
Decrease (increase) in accounts receivable	(30,977		)	(116,987		)
Decrease (increase) in receivable from affiliates	(6,861		)	622
Decrease (increase) in inventories	(13,983		)	(1,804		)
Decrease (increase) in derivatives and margin deposits	1,972			457
Decrease (increase) in other current assets	2,269			8,393
Decrease (increase) in other assets	258			2,457
Increase (decrease) in accounts payable and accrued liabilities	50,614			97,638
Increase (decrease) in payable to affiliates	2,102			(5,160		)
Increase (decrease) in payables to pre-petition creditors	(416		)	(4,541		)
Increase (decrease) in other noncurrent liabilities	(1,349		)	2,942
	$	4,080		$	(11,292	)

Other supplemental disclosures

We recorded a $90.5 million reduction to noncontrolling interests in consolidated subsidiaries and an offsetting increase to additional paid-in capital of $56.8 million (net of tax impact of $33.7 million). This non-cash entry represents the portion of the proceeds in excess of historical cost which were attributed to Rose Rock's third-party unitholders related to Rose Rock's purchase of a 33% interest in SCPL (Note 2).

During the nine months ended September 30,2013, we issued 425,618 Class A units related to the exercise of 772,817 warrants resulting in the non-cash reclassification of $23.5 million from other noncurrent liabilities to common stock and additional paid-in capital. Cash proceeds of $0.2 million were received in connection with the warrant exercises.

We paid cash interest of $7.3 million and $4.4 million for the nine months ended September 30,2013 and 2012, respectively.

We paid cash for income taxes (net of refunds received) of $6.6 million and $5.5 million for the nine months ended September 30,2013 and 2012, respectively.

We incurred liabilities for construction work in process that had not been paid of $16.4 million and $7.0 million as of September 30, 2013 and 2012, respectively. Such amounts are not included in capital expenditures on the consolidated statements of cash flows.

At September 30, 2013, we had a non-cash accrual of goodwill of $9.0 million from unpaid invoices which represent purchase price adjustments related to the acquisition of Mid-America Midstream Gas Services, L.L.C. This amount is not included in acquisition of Mid-America Midstream Gas Services, L.L.C. on the consolidated statement of cash flows.

XML

Financial Instruments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Realized and Unrealized Gains (Losses) from Commodity Derivatives
Realized and unrealized gains (losses) from commodity derivatives	$ (1,652)	$ (631)	$ (2,430)	$ (342)

XML

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Product	$ 288,452	$ 209,202	$ 765,334	$ 708,408
Service	36,402	29,800	95,737	86,727
Other	32,894	38,850	108,617	126,525
Total revenues	357,748	277,852	969,688	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	255,554	189,830	680,632	651,283
Operating	52,360	52,367	162,813	172,750
General and administrative	20,952	16,680	54,887	53,073
Depreciation and amortization	16,113	12,081	41,563	35,687
Loss (gain) on disposal of long-lived assets, net	408	(3,615)	(130)	(3,496)
Total expenses	345,387	267,343	939,765	909,297
Earnings from equity method investments	7,483	3,116	39,689	22,903
Operating income	19,844	13,625	69,612	35,266
Other expenses (income):
Interest expense	9,080	1,992	15,971	7,763
Foreign currency transaction (gain) loss	(457)	355	(973)	358
Other expense, net	4,671	9,354	36,771	16,783
Total other expenses, net	13,294	11,701	51,769	24,904
Income (loss) from continuing operations before income taxes	6,550	1,924	17,843	10,362
Income tax expense (benefit)	3,413	2,091	(41,305)	985
Income (loss) from continuing operations	3,137	(167)	59,148	9,377
Income (loss) from discontinued operations, net of income taxes	(2)	(265)	65	(456)
Net income (loss)	3,135	(432)	59,213	8,921
Less: net income attributable to noncontrolling interests	5,054	2,336	14,429	7,915
Net income (loss) attributable to SemGroup	(1,919)	(2,768)	44,784	1,006
Other comprehensive income (loss), net of income taxes	6,105	12,072	(4,307)	14,930
Comprehensive income (loss)	9,240	11,640	54,906	23,851
Less: comprehensive income attributable to noncontrolling interests	5,054	2,336	14,429	7,915
Comprehensive income (loss) attributable to SemGroup	4,186	9,304	40,477	15,936
Net income per common share (Note 11):
Basic	$ (0.05)	$ (0.07)	$ 1.06	$ 0.02
Diluted	$ (0.05)	$ (0.07)	$ 1.05	$ 0.02
Accumulated Deficit [Member]
Other expenses (income):
Net income (loss)			44,784
Other comprehensive income (loss), net of income taxes			$ 0

XML

Inventories

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

Inventories consist of the following (in thousands):

	September 30, 2013		December 31, 2012
Crude oil	$	32,720	$	24,840
Asphalt and other	13,889		9,593
Total inventories	$	46,609	$	34,433

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Investments In Non-Consolidated Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Equity Method Investments [Table Text Block]

Our equity method investments consist of the following (in thousands):

	September 30, 2013		December 31, 2012
White Cliffs	$	228,076	$	138,970
NGL Energy	187,632		174,398
Glass Mountain	102,441		74,434
Total equity method investments	$	518,149	$	387,802

Earnings from Equity Method Investments [Table Text Block]

Our earnings from equity method investments consist of the following (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
White Cliffs	$	10,786		$	10,021		$	31,886		$	25,053
NGL Energy	(3,288		)	(6,905		)	7,828			(2,150		)
Glass Mountain	(15		)	—			(25		)	—
Total earnings from equity method investments	$	7,483		$	3,116		$	39,689		$	22,903

Cash distributions received from equity method investments [Table Text Block]

Cash distributions received from equity methods investments consist of the following (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
White Cliffs	$	12,755	$	10,794	$	39,436	$	30,561
NGL Energy	4,671		2,090		13,369		5,063
Glass Mountain	—		—		—		—
Total cash distributions received from equity method investments	$	17,426	$	12,884	$	52,805	$	35,624

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

Schedule of Equity Method Investments [Table Text Block]

Certain summarized income statement information of White Cliffs for the three months and nine months ended September 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	31,453	$	28,522	$	92,238	$	76,910
Operating, general and administrative expenses	$	5,141	$	3,857	$	14,433	$	11,382
Depreciation and amortization expense	$	4,720	$	4,995	$	14,150	$	14,964
Net income	$	21,579	$	19,670	$	63,642	$	50,564

NGL Energy Partners LP [Member]

Schedule of Equity Method Investments [Table Text Block]

Certain unaudited summarized income statement information of NGL Energy for the three months and nine months ended June 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2013			2012			2013		2012
Revenue	$	1,385,957		$	326,436		$	4,341,778	$	1,236,023
Cost of products sold	$	1,303,076		$	298,985		$	3,989,511	$	1,128,581
Operating, general and administrative expenses	$	67,499		$	33,298		$	206,824	$	76,015
Depreciation and amortization expense	$	22,724		$	9,227		$	68,989	$	21,260
Net income	$	(17,508	)	$	(24,710	)	$	45,310	$	(4,678	)

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Earnings Per Share (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Diluted earnings per share
Income (loss)	$ 3,137	$ (167)	$ 59,148	$ 9,377
Income (loss) from discontinued operations, net of income taxes	(2)	(265)	65	(456)
Net income	3,135	(432)	59,213	8,921
Less: net income attributable to noncontrolling interests	5,054	2,336	14,429	7,915
Numerator	(1,919)	(2,768)	44,784	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128	549	874	530
Effect of dilutive securities	0		270	252
Denominator, Net, Diluted	42,528	41,949	42,544	42,182
Diluted earnings (loss) per share, Net	$ (0.05)	$ (0.07)	$ 1.05	$ 0.02
Continuing Operations [Member]
Diluted earnings per share
Income (loss)	3,137	(167)	59,148	9,377
Less: net income attributable to noncontrolling interests	5,054	2,336	14,429	7,915
Numerator	(1,917)	(2,503)	44,719	1,462
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128	549	874	530
Effect of dilutive securities	0		270	252
Denominator, Net, Diluted	42,528	41,949	42,544	42,182
Diluted earnings per share, Continuing Operations	$ (0.05)	$ (0.06)	$ 1.05	$ 0.03
Discontinued Operations [Member]
Diluted earnings per share
Income (loss) from discontinued operations, net of income taxes	(2)	(265)	65	(456)
Less: net income attributable to noncontrolling interests	0	0	0	0
Numerator	$ (2)	$ (265)	$ 65	$ (456)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128	549	874	530
Effect of dilutive securities	0		270	252
Denominator, Net, Diluted	42,528	41,949	42,544	42,182
Diluted earnings per share, Discontinued Operations	$ 0.00	$ (0.01)	$ 0.00	$ (0.01)

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Long-Term Debt (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Senior Notes	$ 300,000,000	$ 0
Line of Credit Facility [Abstract]
Capital leases	69,000	86,000
Total long-term debt	540,069,000	206,086,000
less: current portion of long-term debt	26,000	24,000
Noncurrent portion of long-term debt	540,043,000	206,062,000
SemMexico [Member]
Line of Credit Facility [Abstract]
Borrowings	0	0
Corporate [Member]
Line of Credit Facility [Abstract]
Borrowings	155,000,000	201,500,000
Revolving Credit Facility [Member] | SemMexico [Member]
Line of Credit Facility [Abstract]
Borrowings	0
Revolving Credit Facility [Member] | Corporate [Member]
Line of Credit Facility [Abstract]
Borrowings	155,000,000
Rose Rock Midstream L P [Member]
Line of Credit Facility [Abstract]
Borrowings	85,000,000	4,500,000
Noncurrent portion of long-term debt	$ 85,043,000	$ 4,562,000

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Related Party Transactions

9 Months Ended

Sep. 30, 2013

Related Party Transactions [Abstract]

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS

NGL Energy

As described in Note 3, we own interests in NGL Energy, which we account for under the equity method.

During the three and nine months endedSeptember 30, 2013 and 2012, we generated the following transactions with NGL Energy (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues	$	31,043	$	14,395	$	66,367	$	41,945
Purchases	$	8,018	$	6,009	$	8,018	$	36,573
Reimbursements from NGL Energy for transition services	$	60	$	28	$	156	$	526

High Sierra Crude Oil and Marketing, LLC

We generated revenues from High Sierra Crude Oil and Marketing, LLC ("High Sierra"), which is a subsidiary of NGL Energy, of $15.7 million and $12.4 million for the three months ended September 30, 2013 and 2012, respectively. We generated revenues from High Sierra of $68.6 million and $23.4 million for the nine months ended September 30, 2013 and 2012, respectively. Purchases from High Sierra were $6.5 million and $16.3 million for the three months ended September 30, 2013 and 2012, respectively. Purchases from High Sierra were $34.7 million and $32.2 million for the nine months ended September 30, 2013 and 2012, respectively. Transactions with High Sierra primarily relate to transportation and marketing of crude oil and condensate. 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 as the purchases of inventory and subsequent sales of the inventory were with the same counterparty.

White Cliffs

As described in Note 3, we account for our ownership interest in White Cliffs under the equity method. During the three months ended September 30, 2013 and 2012, we generated storage revenue from White Cliffs of approximately $0.8 million and $0.6 million, respectively. We generated storage revenue from White Cliffs of approximately $2.1 million and $1.8 million during the nine months ended September 30,2013 and 2012, respectively.

Glass Mountain

As described in Note 3, in May 2012, we formed a joint venture, Glass Mountain, to construct, maintain and operate a 210-mile crude oil pipeline system originating in Alva and Arnett, Oklahoma and terminating at Cushing, OK. In connection with the pipeline project, Glass Mountain entered into a Pipeline Construction Management Agreement with Glass Mountain Holding, LLC ("GMH"), a wholly-owned subsidiary of SemGroup. The Pipeline Construction Management Agreement appoints GMH as construction manager of the pipeline project for which GMH will receive $0.9 million prorated over the period of construction. For the three months and the nine months ended September 30,2013, Glass Mountain paid $0.1 million and $0.4 million to GMH pursuant to this agreement, the remaining balance of $0.1 million will be received by GMH over the period of construction.

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, General Counsel and Secretary. Mr. Berman does not perform any legal services for us. SemGroup paid $0.6 million and $0.5 million in legal fees and related expenses to this law firm during the three months ended September 30, 2013 and 2012, respectively (of which $68.0 thousand and $9.9 thousand was paid by White Cliffs during the three months ended September 30, 2013 and 2012, respectively). SemGroup paid $1.6 million and $1.2 million in legal fees and related expenses to this law firm during the nine months endedSeptember 30, 2013 and 2012, respectively (of which $79.6 thousand and $56.1 thousand was paid by White Cliffs during the nine months endedSeptember 30, 2013 and 2012, respectively).

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Segments (Details Textual) (Customer Concentration Risk [Member])	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	13.00%	10.00%
Number of customers accounting for in excess of 10% of revenue		2

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Long-Term Debt Long-Term Debt (Details 1)	9 Months Ended
	Sep. 30, 2013
2016 Redemption [Member]
Early redemption premium	105.625%
2017 Redemption [Member]
Early redemption premium	103.75%
2018 Redemption [Member]
Early redemption premium	101.875%
2019 Redemption and Thereafter
Early redemption premium	100.00%

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Rose Rock Midstream, L.P. (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Summarized Balance Sheet Information
Other current assets	$ 15,167	$ 18,516
Property, plant and equipment, net	1,057,116	814,724
Equity method investment	518,149	387,802
Goodwill	60,676	9,884
Other noncurrent assets, net	32,603	8,181
Total assets	2,390,402	1,748,179
Current liabilities	447,636	374,344
Long-term debt	540,043	206,062
Total liabilities and owners' equity	2,390,402	1,748,179
Rose Rock Midstream, L.P. [Member]
Summarized Balance Sheet Information
Cash	1,914	108
Other current assets	292,386	250,509
Property, plant and equipment, net	313,193	291,530
Equity method investment	77,449	0
Goodwill	27,261	0
Other noncurrent assets, net	10,536	2,579
Total assets	722,739	544,726
Current liabilities	254,491	231,843
Long-term debt	85,043	4,562
Partners' capital attributable to parent	130,845	179,187
Partners' capital attributable to noncontrolling interest	252,360	129,134
Total liabilities and owners' equity	$ 722,739	$ 544,726

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Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value of Financial Assets and Liabilities

The tables below summarize the balances of these assets and liabilities at September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013									December 31, 2012
	Level 1			Netting*			Total			Level 1			Netting*			Total
Assets:
Commodity derivatives	$	857		$	(132	)	$	725		$	22		$	(22	)	$	—
Total assets	857			(132		)	725			22			(22		)	—
Liabilities:
Commodity derivatives	$	132		$	(132	)	$	—		$	1,056		$	(22	)	$	1,034
Warrants	46,350			—			46,350			32,858			—			32,858
Total liabilities	46,482			(132		)	46,350			33,914			(22		)	33,892
Net assets (liabilities) at fair value	$	(45,625	)	$	—		$	(45,625	)	$	(33,892	)	$	—		$	(33,892	)

*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 Changes in Fair Value of Financial Assets (Liabilities) Classified as Level 3

There were no financial assets or liabilities classified as Level 2 or Level 3 during the three months and nine months ended September 30, 2013 and 2012, as such no rollforward of activity has been presented.

Schedule of Notional Quantities for Commodity Derivative Instruments

The following table sets forth the unaudited notional quantities for commodity derivative instruments entered into (in thousands of barrels):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Sales	695	470	2,025	1,153
Purchases	805	380	2,095	1,066

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 September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Commodity contracts	$	(1,652	)	$	(631	)	$	(2,430	)	$	(342	)

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

We record 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):

	September 30, 2013				December 31, 2012
	Assets		Liabilities		Assets		Liabilities
Commodity contracts	$	725	$	—	$	—	$	1,034

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Inventories (Tables)

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Components Of Inventories

Inventories consist of the following (in thousands):

	September 30, 2013		December 31, 2012
Crude oil	$	32,720	$	24,840
Asphalt and other	13,889		9,593
Total inventories	$	46,609	$	34,433

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Investments in Non-Consolidated Subsidiaries (Details Textual) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended				3 Months Ended		9 Months Ended	14 Months Ended	3 Months Ended		9 Months Ended	17 Months Ended
	Sep. 30, 2013 mi	Sep. 30, 2012	Sep. 30, 2013 Width	Sep. 30, 2012	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2012 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] mi	Sep. 30, 2012 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2013 General Partner [Member] NGL Energy Partners LP [Member]	Mar. 31, 2013 General Partner [Member] NGL Energy Partners LP [Member]	Sep. 30, 2013 NGL Energy Partners LP [Member]	Jun. 30, 2013 NGL Energy Partners LP [Member]	Mar. 31, 2013 NGL Energy Partners LP [Member] Limited Partner Interests [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] Semcrude Pipeline [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] Semcrude Pipeline [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] Semcrude Pipeline [Member]	Sep. 30, 2013 Glass Mountain Pipeline Llc [Member]	Sep. 30, 2012 Glass Mountain Pipeline Llc [Member]	Sep. 30, 2013 Glass Mountain Pipeline Llc [Member]	Sep. 30, 2013 Glass Mountain Pipeline Llc [Member]	May 31, 2012 Glass Mountain Pipeline Llc [Member]	Sep. 30, 2013 Pipeline expansion [Member] White Cliffs Pipeline, L.L.C. [Member] Semcrude Pipeline [Member]
Equity method investment, ownership percentage							51.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest													17.00%
Width of pipeline in inches			12
Total expected project costs														$ 300,000,000	$ 300,000,000	$ 300,000,000
Partners' Capital Account, Contributions														35,900,000	95,500,000	97,800,000	6,700,000		28,000,000	102,400,000
Estimated Project Contributions in Year Two																	3,500,000		3,500,000	3,500,000		53,300,000
General and administrative	20,952,000	16,680,000	54,887,000	53,073,000	500,000	0	1,200,000	1,500,000
Common units											9,133,409
Percentage of ownership interest					17.00%		17.00%							51.00%	51.00%	51.00%	50.00%		50.00%	50.00%	25.00%
Common units representing limited partner interests												53,622,659
General Partner Ownership Interest									11.78%	11.78%
Fair market value of common units											281,700,000
Share Price	$ 57.02		$ 57.02								$ 30.84
Length Of Pipeline Network	210						527
Equity Method Investment, Additional Ownership Percentage																		25.00%
Additional cash capital contribution, year one																	$ 26,500,000		$ 26,500,000	$ 26,500,000

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Acquisition Acquisition (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Goodwill [Table Text Block]

The above acquisitions accounted for the majority of the change to our goodwill during the nine months ended September 30, 2013, as follows (in thousands):

Balance at December 31, 2012	$	9,884
Acquisitions	50,848
Currency translation adjustments	(56		)
Balance at September 30, 2013	$	60,676

Mid-America Midstream Gas Services, L.L.C. [Member]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

We have preliminarily estimated the fair value of the assets acquired as follows (in thousands):

Property, plant and equipment	$	123,316
Customer contract intangible	169,244
Goodwill	23,587
Total assets acquired	$	316,147

Barcas Field Services, LLC [Member]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

We have preliminarily estimated the fair value of the assets acquired as follows (in thousands):

Property, plant and equipment	$	16,690
Customer contract intangible	6,018
Goodwill	27,261
Total assets acquired	$	49,969

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Rose Rock Midstream, L.P. (Details Textual) (USD $)	3 Months Ended	9 Months Ended				0 Months Ended		9 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended			0 Months Ended			9 Months Ended			0 Months Ended	9 Months Ended			9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 mi	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013 Semcrude Pipeline [Member]	Jan. 11, 2013 SemCrude Pipeline [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member]	Mar. 31, 2013 Rose Rock Midstream, L.P. [Member] Semcrude Pipeline [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Common Units [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member] Common Units [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Class A [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member] Class A [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member] Subordinated Units [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Private Placement [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Private Placement [Member] Common Units [Member]	Jan. 11, 2013 White Cliffs Pipeline, L.L.C. [Member] bbl	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] mi	Sep. 30, 2013 SemCrude Pipeline [Member]	Jan. 11, 2013 SemCrude Pipeline [Member] White Cliffs Pipeline, L.L.C. [Member]	Jan. 11, 2013 Revolving Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Revolving Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Jan. 13, 2013 Revolving Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Dec. 31, 2012 Revolving Credit Facility [Member] Rose Rock Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Limited Partner [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 General Partner [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 General Partner [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Noncontrolling Interest [Member]		Sep. 30, 2013 Additional Paid-In Capital [Member]
Subsidiary (Textual) [Abstract]
Common units representing limited partner interests											2,900,000		1,250,000	8,400,000
Partners' minimum quarterly distribution per unit	$ 0.3625	$ 0.3625
Partners' Capital Account, Units, Sold in Public Offering											4,750,000
Proceeds from Noncontrolling Interests	$ 152,500,000
Equity Method Investment, Ownership Percentage					33.00%													17.00%	33.00%	51.00%
Length Of Pipeline Network	210																	527
Gain (Loss) on Sale of Equity Investments						0
Sale of interest in equity investment to related party		33,716,000	[1]																									90,516,000	[1]	(56,800,000)	[1]
Tax effect of adjustment to APIC from sale of equity investment to less than wholly owned subsidiary		33,700,000
Proceeds from Issuance of Private Placement																2,000,000
Business Acquisition, Cost of Acquired Entity, Cash Paid		143,463,000		63,999,000					189,500,000
Stock Issued During Period, Shares, New Issues										1,500,000		1,250,000
Average daily throughput threshold in barrels for conversion of Class A units																	125,000
Proceeds from Issuance of Common Stock															59,300,000
Line of Credit Facility, Current Borrowing Capacity																							385,000,000	150,000,000
Proceeds from Lines of Credit							133,500,000														133,500,000
General Partner Ownership Interest																										2.00%	2.00%
Transaction related costs		1,400,000						3,700,000
Limited Partnership Unit Issuance Costs, Incurred								1,600,000
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest																									46.70%
Debt Issuance Cost																						1,600,000
Business Combination, Acquisition Related Costs								$ 500,000

[1] * On January 13, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. to our consolidated subsidiary, Rose Rock. As this transaction was between entities under common control, the interest in SemCrude Pipeline, L.L.C. was recorded by Rose Rock based on SemGroup's book value. This amount represents the purchase price in excess of book value which was attributed to the noncontrolling interest owners of Rose Rock. The entry to additional paid-in capital has been recorded net of tax.

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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Components of Inventories
Crude oil	$ 32,720	$ 24,840
Asphalt and other	13,889	9,593
Total Inventories	$ 46,609	$ 34,433

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Basic and diluted earnings per share

The following summarizes the calculation of basic earnings (loss) per share for the three months and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

	Three Months Ended September 30, 2013									Three Months Ended September 30, 2012
	Continuing Operations			Discontinued Operations			Net			Continuing Operations			Discontinued Operations			Net
Income	$	3,137		$	(2	)	$	3,135		$	(167	)	$	(265	)	$	(432	)
less: Income attributable to noncontrolling interests	5,054			—			5,054			2,336			—			2,336
Numerator	$	(1,917	)	$	(2	)	$	(1,919	)	$	(2,503	)	$	(265	)	$	(2,768	)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400			41,400			41,400			41,400			41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128			1,128			1,128			549			549			549
Denominator	42,528			42,528			42,528			41,949			41,949			41,949
Basic earnings (loss) per share	$	(0.05	)	$	—		$	(0.05	)	$	(0.06	)	$	(0.01	)	$	(0.07	)

	Nine Months Ended September 30, 2013						Nine Months Ended September 30, 2012
	Continuing Operations		Discontinued Operations		Net		Continuing Operations		Discontinued Operations			Net
Income	$	59,148	$	65	$	59,213	$	9,377	$	(456	)	$	8,921
less: Income attributable to noncontrolling interests	14,429		—		14,429		7,915		—			7,915
Numerator	$	44,719	$	65	$	44,784	$	1,462	$	(456	)	$	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400		41,400		41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	874		874		874		530		530			530
Denominator	42,274		42,274		42,274		41,930		41,930			41,930
Basic earnings (loss) per share	$	1.06	$	—	$	1.06	$	0.03	$	(0.01	)	$	0.02

The following summarizes the calculation of diluted earnings (loss) per share for the three months and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

	Three Months Ended September 30, 2013									Three Months Ended September 30, 2012
	Continuing Operations			Discontinued Operations			Net			Continuing Operations			Discontinued Operations			Net
Income	$	3,137		$	(2	)	$	3,135		$	(167	)	$	(265	)	$	(432	)
less: Income attributable to noncontrolling interests	5,054			—			5,054			2,336			—			2,336
Numerator	$	(1,917	)	$	(2	)	$	(1,919	)	$	(2,503	)	$	(265	)	$	(2,768	)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400			41,400			41,400			41,400			41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128			1,128			1,128			549			549			549
Effect of dilutive securities	—			—			—			—			—			—
Denominator	42,528			42,528			42,528			41,949			41,949			41,949
Diluted earnings (loss) per share	$	(0.05	)	$	—		$	(0.05	)	$	(0.06	)	$	(0.01	)	$	(0.07	)

	Nine Months Ended September 30, 2013						Nine Months Ended September 30, 2012
	Continuing Operations		Discontinued Operations		Net		Continuing Operations		Discontinued Operations			Net
Income	$	59,148	$	65	$	59,213	$	9,377	$	(456	)	$	8,921
less: Income attributable to noncontrolling interests	14,429		—		14,429		7,915		—			7,915
Numerator	$	44,719	$	65	$	44,784	$	1,462	$	(456	)	$	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400		41,400		41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	874		874		874		530		530			530
Effect of dilutive securities	270		270		270		252		252			252
Denominator	42,544		42,544		42,544		42,182		42,182			42,182
Diluted earnings (loss) per share	$	1.05	$	—	$	1.05	$	0.03	$	(0.01	)	$	0.02

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Equity (Details 3) (USD $)	Sep. 30, 2013
Warrants and Rights Note Disclosure [Abstract]
Total warrants	1,360,823
Fair value per warrant	$ 34.06
Warrant value included within other noncurrent liabilities	$ 46,349,631.38
Warrants Issued On Emergence Date [Member]
Warrants and Rights Note Disclosure [Abstract]
Total warrants	1,634,210
Warrants Subsequently Issued In Settlement Of Pre-Petition Claims [Member]
Warrants and Rights Note Disclosure [Abstract]
Total warrants	237,897
Remaining Warrants To Be Issued In Settlement Of Pre-Petition Claims [Member]
Warrants and Rights Note Disclosure [Abstract]
Total warrants	306,840
Warrants Exercised [Member]
Warrants and Rights Note Disclosure [Abstract]
Total warrants	818,124	[1]

[1] (*) During the nine months ended September 30, 2013, certain warrant holders exercised a total of 772,817 warrants resulting in the issuance of 425,618 Class A shares.

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Related Party Transactions (Details Textual) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013 High Sierra Crude Oil and Marketing, LLC [Member]	Sep. 30, 2012 High Sierra Crude Oil and Marketing, LLC [Member]	Sep. 30, 2013 High Sierra Crude Oil and Marketing, LLC [Member]	Sep. 30, 2012 High Sierra Crude Oil and Marketing, LLC [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2012 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2012 White Cliffs Pipeline, L.L.C. [Member]	Sep. 30, 2013 Law Firm [Member]	Sep. 30, 2012 Law Firm [Member]	Sep. 30, 2013 Law Firm [Member]	Sep. 30, 2012 Law Firm [Member]	Sep. 30, 2013 Glass Mountain Holding LLC [Member] Glass Mountain Pipeline Llc [Member]	Sep. 30, 2013 Glass Mountain Holding LLC [Member] Glass Mountain Pipeline Llc [Member]	May 31, 2012 Glass Mountain Holding LLC [Member] Glass Mountain Pipeline Llc [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] Law Firm [Member]	Sep. 30, 2012 White Cliffs Pipeline, L.L.C. [Member] Law Firm [Member]	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] Law Firm [Member]	Sep. 30, 2012 White Cliffs Pipeline, L.L.C. [Member] Law Firm [Member]
Related Party Transactions (Textual) [Abstract]
Revenues	$ 15,700,000	$ 12,400,000	$ 68,600,000	$ 23,400,000	$ 800,000	$ 600,000	$ 2,100,000	$ 1,800,000					$ 100,000	$ 400,000
Related Party Transaction, Purchases from Related Party	6,500,000	16,300,000	34,700,000	32,200,000
Legal fees									600,000	500,000	1,600,000	1,200,000				68,000	9,900	79,600	56,100
Due from Related Parties															900,000
Future earnings from related party under management agreement													$ 100,000	$ 100,000

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Equity (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet
Total shares	42,530,641
Par value per share	$ 0.01
Common stock	$ 425		$ 420
Shares Issued On Emergence Date [Member]
Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet
Total shares	40,882,496
Shares Subsequently Issued In Settlement Of Pre-Petition Claims [Member]
Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet
Total shares	226,016
Remaining Shares Required To Be Issued In Settlement Of Pre-Petition Claims [Member]
Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet
Total shares	291,484
Issuance of Shares Under Employee and Director Compensation Programs [Member]
Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet
Total shares	689,320	[1]
Shares Issued Upon Exercise Of Warrants [Member]
Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet
Total shares	441,325

[1] (*) These shares include 105,738 shares which vested during the nine months ended September 30, 2013. Of these vested shares, recipients sold back to the Company 8,591 shares to satisfy tax withholding obligations which are being recognized at cost as treasury stock on the condensed consolidated balance sheet.

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Investments in Non-Consolidated Subsidiaries Investments in Non-Consolidated Subsidiaries (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Proceeds from Equity Method Investment, Dividends or Distributions			$ 39,714	$ 25,053
White Cliffs Pipeline L L C [Member]
Proceeds from Equity Method Investment, Dividends or Distributions	12,755	10,794	39,436	30,561
NGL Energy Partners LP [Member]
Proceeds from Equity Method Investment, Dividends or Distributions	4,671	2,090	13,369	5,063
Glass Mountain Pipeline Llc [Member]
Proceeds from Equity Method Investment, Dividends or Distributions	0	0	0	0
Return of and return on capital [Member]
Proceeds from Equity Method Investment, Dividends or Distributions	$ 17,426	$ 12,884	$ 52,805	$ 35,624

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Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Components of operating assets and liabilities
Decrease (increase) in restricted cash	$ 451	$ 4,691
Decrease (increase) in accounts receivable	(30,977)	(116,987)
Decrease (increase) in receivable from affiliates	(6,861)	622
Decrease (increase) in inventories	(13,983)	(1,804)
Decrease (increase) in derivatives and margin deposits	1,972	457
Decrease (increase) in other current assets	2,269	8,393
Decrease (increase) in other assets	258	2,457
Increase (decrease) in accounts payable and accrued liabilities	50,614	97,638
Increase (decrease) in payable to affiliates	2,102	(5,160)
Increase (decrease) in payables to pre-petition creditors	(416)	(4,541)
Increase (decrease) in other noncurrent liabilities	(1,349)	2,942
Total changes in operating assets and liabilities	$ 4,080	$ (11,292)

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Segments (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

	Three Months Ended September 30, 2013
	Crude		SemStream			SemCAMS		SemGas		SemLogistics			SemMexico			Corporate and Other			Consolidated
								(dollars in thousands)
Revenues:
External	$	181,831	$	—		$	48,979	$	59,220	$	2,169		$	65,549		$	—		$	357,748
Intersegment	—		—			—		6,575		—			—			(6,575		)	—
Total revenues	181,831		—			48,979		65,795		2,169			65,549			(6,575		)	357,748
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	157,550		—			106		48,403		—			56,070			(6,575		)	255,554
Operating	9,098		—			33,980		5,436		1,616			2,230			—			52,360
General and administrative	3,360		114			3,446		1,923		1,679			2,510			7,920			20,952
Depreciation and amortization	4,130		—			2,631		4,992		2,334			1,529			497			16,113
Loss (gain) on disposal of long-lived assets, net	—		—			—		679		—			(271		)	—			408
Total expenses	174,138		114			40,163		61,433		5,629			62,068			1,842			345,387
Earnings from equity method investments	10,771		(3,288		)	—		—		—			—			—			7,483
Operating income (loss)	18,464		(3,402		)	8,816		4,362		(3,460		)	3,481			(8,417		)	19,844
Other expenses (income), net	3,634		(1,238		)	4,720		880		(217		)	(21		)	5,536			13,294
Income (loss) from continuing operations before income taxes	$	14,830	$	(2,164	)	$	4,096	$	3,482	$	(3,243	)	$	3,502		$	(13,953	)	$	6,550
Total assets at September 30, 2013 (excluding intersegment receivables)	$	1,012,535	$	187,632		$	320,431	$	510,129	$	167,741		$	95,317		$	96,617		$	2,390,402

For the three months ended September 30, 2013, one customer from our Crude segment accounted for 13% of our total consolidated revenue.

	Three Months Ended September 30, 2012
	Crude			SemStream			SemCAMS		SemGas			SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	131,616		$	—		$	54,301	$	27,627		$	2,213		$	62,095		$	—		$	277,852
Intersegment	—			—			—		2,251			—			—			(2,251		)	—
Total revenues	131,616			—			54,301		29,878			2,213			62,095			(2,251		)	277,852
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	111,790			—			309		24,068			97			55,817			(2,251		)	189,830
Operating	6,042			7			40,081		2,931			1,436			1,870			—			52,367
General and administrative	5,015			528			3,354		1,329			990			1,501			3,963			16,680
Depreciation and amortization	3,066			—			2,664		1,797			2,388			1,536			630			12,081
Gain on disposal of long-lived assets, net	(3,500		)	—			—		(3		)	—			(112		)	—			(3,615		)
Total expenses	122,413			535			46,408		30,122			4,911			60,612			2,342			267,343
Earnings from equity method investments	10,021			(6,905		)	—		—			—			—			—			3,116
Operating income (loss)	19,224			(7,440		)	7,893		(244		)	(2,698		)	1,483			(4,593		)	13,625
Other expenses (income), net	(119		)	(2,551		)	3,419		(378		)	337			(82		)	11,075			11,701
Income (loss) from continuing operations before income taxes	$	19,343		$	(4,889	)	$	4,474	$	134		$	(3,035	)	$	1,565		$	(15,668	)	$	1,924

	Nine Months Ended September 30, 2013
	Crude			SemStream			SemCAMS		SemGas		SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	514,485		$	—		$	151,219	$	135,782	$	7,827		$	160,375		$	—		$	969,688
Intersegment	—			—			—		15,678		—			—			(15,678		)	—
Total revenues	514,485			—			151,219		151,460		7,827			160,375			(15,678		)	969,688
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	446,507			—			290		111,141		—			138,372			(15,678		)	680,632
Operating	20,527			1			116,372		13,869		5,303			6,741			—			162,813
General and administrative	10,778			430			10,933		5,112		4,285			7,175			16,174			54,887
Depreciation and amortization	11,327			—			7,925		9,353		6,987			4,467			1,504			41,563
Loss (gain) on disposal of long-lived assets, net	(25		)	6			—		673		—			(784		)	—			(130		)
Total expenses	489,114			437			135,520		140,148		16,575			155,971			2,000			939,765
Earnings from equity method investments	31,861			7,828			—		—		—			—			—			39,689
Operating income (loss)	57,232			7,391			15,699		11,312		(8,748		)	4,404			(17,678		)	69,612
Other expenses (income), net	10,925			(3,399		)	14,179		2,149		896			(339		)	27,358			51,769
Income (loss) from continuing operations before income taxes	$	46,307		$	10,790		$	1,520	$	9,163	$	(9,644	)	$	4,743		$	(45,036	)	$	17,843

For the nine months ended September 30, 2013, two customers from our Crude segment each accounted for 10% of our total consolidated revenue.

	Nine Months Ended September 30, 2012
	Crude			SemStream			SemCAMS		SemGas			SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	468,748		$	7		$	169,149	$	81,917		$	8,610		$	193,229		$	—		$	921,660
Intersegment	—			—			—		7,535			—			—			(7,535		)	—
Total revenues	468,748			7			169,149		89,452			8,610			193,229			(7,535		)	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	412,847			33			499		70,607			196			174,636			(7,535		)	651,283
Operating	17,957			(18		)	135,165		9,092			4,521			6,033			—			172,750
General and administrative	9,796			582			10,404		4,564			4,249			6,730			16,748			53,073
Depreciation and amortization	9,032			—			7,910		5,153			7,040			4,614			1,938			35,687
Gain on disposal of long-lived assets, net	(3,444		)	—			—		(3		)	—			(49		)	—			(3,496		)
Total expenses	446,188			597			153,978		89,413			16,006			191,964			11,151			909,297
Earnings from equity method investments	25,053			(2,150		)	—		—			—			—			—			22,903
Operating income (loss)	47,613			(2,740		)	15,171		39			(7,396		)	1,265			(18,686		)	35,266
Other expenses (income), net	(739		)	(2,507		)	13,974		924			1,805			233			11,214			24,904
Income (loss) from continuing operations before income taxes	$	48,352		$	(233	)	$	1,197	$	(885	)	$	(9,201	)	$	1,032		$	(29,900	)	$	10,362

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Overview

9 Months Ended

Sep. 30, 2013

Overview [Abstract]

OVERVIEW

OVERVIEW

SemGroup Corporation is a Delaware corporation headquartered in Tulsa, Oklahoma. SemGroup Corporation is the successor entity of SemGroup, L.P., which was an Oklahoma limited partnership. 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, SemGroup, L.P., and their subsidiaries.

Basis of presentation

The accompanying condensed consolidated 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.

The accompanying condensed consolidated financial statements are unaudited. The condensed consolidated balance sheet at December 31, 2012, is derived from audited financial statements.

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 nine months ended September 30, 2013, are not necessarily indicative of the results to be expected for the full year ending December 31, 2013.

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. 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, 2012, which are included in our Annual Report on Form 10-K for the year ended December 31, 2012, filed with the SEC.

Certain reclassifications have been made to conform previously reported balances to the current presentation.

Our significant accounting policies are consistent with those described in our Annual Report on Form 10-K for the year ended December 31, 2012.

Recent accounting pronouncements

On January 31, 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2013-01, "Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities," which clarifies the scope of the offsetting disclosure requirements in ASU 2011-11, "Disclosures About Offsetting Assets and Liabilities." Under ASU 2013-01, the disclosure requirements apply to derivative instruments accounted for in accordance with Accounting Standards Codification ("ASC") 815, "Derivatives and Hedging," including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending arrangements that are either offset on the balance sheet or subject to an enforceable master netting arrangement or similar agreement. ASU 2013-01 is effective for fiscal years beginning on or after January 1, 2013, and interim periods within those years. Retrospective application is required for all comparative periods presented. We adopted this guidance in the first quarter of 2013. The impact of adoption was not material.

On February 5, 2013, the FASB issued ASU 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income." This ASU adds new disclosure requirements for items reclassified out of accumulated other comprehensive income ("AOCI"). The ASU is intended to help entities improve the transparency of changes in other comprehensive income ("OCI") and items reclassified out of AOCI in their financial statements. It does not amend any existing requirements for reporting net income or OCI in the financial statements. We adopted this guidance in the first quarter of 2013. The impact of adoption was not material.

On February 28, 2013, the FASB issued ASU 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date (a consensus of the FASB Emerging Issues Task Force)." The ASU requires entities to “measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date, as the sum of the following:

•the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors; and

•any additional amount the reporting entity expects to pay on behalf of its co-obligors.”

Required disclosures include a description of the joint and several arrangement and the total outstanding amount of the obligation for all joint parties. The ASU permits entities to aggregate disclosures (as opposed to providing separate disclosures for each joint and several obligation). These disclosure requirements are incremental to the existing related-party disclosure requirements in ASC 850, "Related Party Disclosures." The ASU is effective for public entities for all prior periods in fiscal years beginning on or after December 15, 2013, and interim reporting periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

On March 4, 2013, the FASB issued ASU 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment Upon Derecognition of Certain Subsidiaries or Groups of Assets Within a Foreign Entity or of an Investment in a Foreign Entity - a consensus of the FASB Emerging Issues Task Force”, which indicates that the entire amount of a cumulative translation adjustment ("CTA") related to an entity's investment in a foreign entity should be released when there has been a:

• sale of a subsidiary or group of net assets within a foreign entity and the sale represents the substantially complete liquidation of the investment in the foreign entity;

• loss of a controlling financial interest in an investment in a foreign entity (i.e., the foreign entity is deconsolidated); or

• step acquisition for a foreign entity (i.e., when an entity has changed from applying the equity method for an investment in a foreign entity to consolidating the foreign entity).

The ASU does not change the requirement to release a pro rata portion of the CTA of the foreign entity into earnings for a partial sale of an equity method investment in a foreign entity. For public entities, this ASU is effective for fiscal years beginning on or after December 15, 2013, and interim periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

In July 2013, the FASB issued ASU 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," which requires an unrecognized tax benefit to be classified as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except in certain circumstances. For public entities, this ASU is effective for fiscal years beginning on or after December 15, 2013, and interim periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

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Investments in Non-Consolidated Subsidiaries

9 Months Ended

Sep. 30, 2013

Equity Method Investments and Joint Ventures [Abstract]

INVESTMENTS IN NON-CONSOLIDATED SUBSIDIARIES

INVESTMENTS IN NON-CONSOLIDATED SUBSIDIARIES

Our investments in affiliates over which we have significant influence, but for which we do not control the operating decisions of the investee, are accounted for under the equity method. Under the equity method, we do not report the individual assets and liabilities of our investees on our condensed consolidated balance sheets. Instead, our ownership interest is reflected in one line as a noncurrent asset on our condensed consolidated balance sheets. Our equity method investments consist of the following (in thousands):

	September 30, 2013		December 31, 2012
White Cliffs	$	228,076	$	138,970
NGL Energy	187,632		174,398
Glass Mountain	102,441		74,434
Total equity method investments	$	518,149	$	387,802

Under the equity method, we do not report the individual revenues and expenses of our investees in our condensed consolidated statements of income. Instead, our interest in the earnings of our investees is reflected in one line item on our condensed consolidated statement of operations and comprehensive income. Our earnings from equity method investments consist of the following (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
White Cliffs	$	10,786		$	10,021		$	31,886		$	25,053
NGL Energy	(3,288		)	(6,905		)	7,828			(2,150		)
Glass Mountain	(15		)	—			(25		)	—
Total earnings from equity method investments	$	7,483		$	3,116		$	39,689		$	22,903

Cash distributions received from equity methods investments consist of the following (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
White Cliffs	$	12,755	$	10,794	$	39,436	$	30,561
NGL Energy	4,671		2,090		13,369		5,063
Glass Mountain	—		—		—		—
Total cash distributions received from equity method investments	$	17,426	$	12,884	$	52,805	$	35,624

White Cliffs

We account for our 51% ownership of White Cliffs under the equity method, as the other owners have substantive rights to participate in its management.

In August 2012, the owners of White Cliffs approved an expansion project to construct a 12" pipeline from Platteville, Colorado to Cushing, Oklahoma. The project is expected to cost approximately $300 million, which will be funded by capital calls to owners. Our funding requirement will be 51% of the total cost. We have contributed approximately $97.8 million for project funding up through September 30, 2013, including $35.9 million and $95.5 million for the three months and nine months ended September 30, 2013, respectively, and estimate our expected remaining contributions to be $53.3 million, which will be made in 2014.

Certain summarized income statement information of White Cliffs for the three months and nine months ended September 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	31,453	$	28,522	$	92,238	$	76,910
Operating, general and administrative expenses	$	5,141	$	3,857	$	14,433	$	11,382
Depreciation and amortization expense	$	4,720	$	4,995	$	14,150	$	14,964
Net income	$	21,579	$	19,670	$	63,642	$	50,564

The equity in earnings of White Cliffs for the three months and nine months ended September 30, 2013 and 2012 reported in our condensed consolidated statement of operations and comprehensive income is less than 51% of the net income of White Cliffs for the same period. 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 $0.5 million and $24 thousand of such general and administrative expense for the three months ended September 30, 2013 and 2012, respectively, and $1.2 million and $1.5 million for the nine months ended September 30, 2013 and 2012, respectively.

NGL Energy Partners LP

We own 9,133,409 common units representing limited partner interests in NGL Energy Partners LP (NYSE: NGL) (“NGL Energy”), which represents approximately 17.0% of the total 53,622,659 limited partner units of NGL Energy outstanding at June 30, 2013, and a 11.78% interest in the general partner of NGL Energy.

At September 30, 2013, the fair market value of our 9,133,409 common unit investment in NGL Energy was $281.7 million, based on a September 30, 2013 closing price of $30.84 per common unit. This does not reflect our interest in the general partner of NGL Energy. The fair value of our limited partner investment in NGL Energy is categorized as a Level 1 measurement, as it is based on quoted market prices.

Our policy is to record our equity in earnings of NGL Energy on a one-quarter lag, as we do not expect information on the earnings of NGL Energy to always be available in time to consistently record the earnings in the quarter in which they are generated. Accordingly, the equity in earnings from NGL Energy, which is reflected in our condensed consolidated statements of operations and comprehensive income for the three months and nine months ended September 30, 2013 and 2012, relates to the earnings of NGL Energy for the three months and nine months ended June 30, 2013 and 2012, prorated for the period of time we held our ownership interest in NGL Energy.

Certain unaudited summarized income statement information of NGL Energy for the three months and nine months ended June 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2013			2012			2013		2012
Revenue	$	1,385,957		$	326,436		$	4,341,778	$	1,236,023
Cost of products sold	$	1,303,076		$	298,985		$	3,989,511	$	1,128,581
Operating, general and administrative expenses	$	67,499		$	33,298		$	206,824	$	76,015
Depreciation and amortization expense	$	22,724		$	9,227		$	68,989	$	21,260
Net income	$	(17,508	)	$	(24,710	)	$	45,310	$	(4,678	)

Glass Mountain Pipeline, LLC

In May 2012, we formed a joint venture, Glass Mountain Pipeline, LLC (“Glass Mountain” or "GMP"), to construct, maintain and operate a 210-mile crude oil pipeline system ("the Glass Mountain Pipeline") originating in Alva and Arnett, Oklahoma and terminating at Cushing, Oklahoma. The Glass Mountain Pipeline is expected to be operational in January 2014. Once the pipeline is in service, it will be operated by a subsidiary of Rose Rock. Our original ownership interest in GMP was 25%. In September 2012, we acquired an additional 25% ownership interest in GMP, bringing our total ownership interest to 50% . We account for our investment in GMP using the equity method. As of September 30, 2013, we have invested $102.4 million in GMP including our capital contributions, amounts paid to acquire the additional ownership percentage, and capitalized interest. We invested $6.7 million and $28.0 million in GMP for the three months and nine months ended September 30, 2013, respectively. We expect to make additional contributions of approximately $26.5 million for the remainder of 2013 and $3.5 million in 2014.

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Financial Instruments

9 Months Ended

Sep. 30, 2013

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 these assets and liabilities at September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013									December 31, 2012
	Level 1			Netting*			Total			Level 1			Netting*			Total
Assets:
Commodity derivatives	$	857		$	(132	)	$	725		$	22		$	(22	)	$	—
Total assets	857			(132		)	725			22			(22		)	—
Liabilities:
Commodity derivatives	$	132		$	(132	)	$	—		$	1,056		$	(22	)	$	1,034
Warrants	46,350			—			46,350			32,858			—			32,858
Total liabilities	46,482			(132		)	46,350			33,914			(22		)	33,892
Net assets (liabilities) at fair value	$	(45,625	)	$	—		$	(45,625	)	$	(33,892	)	$	—		$	(33,892	)

*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 use as inputs 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. These also include common stock warrants (Note 10) which are traded on the New York Stock Exchange.

“Level 2” measurements use as inputs market observable and corroborated prices for similar commodity derivative contracts. Assets and liabilities classified as Level 2 include over-the-counter (“OTC”) traded forward contracts and swaps.

“Level 3” measurements use as inputs information from a pricing service and internal valuation models incorporating observable and unobservable market data. These may 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.

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 September 30, 2013, 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 classified as Level 2 or Level 3 during the three months and nine months ended September 30, 2013 and 2012, as such no rollforward of 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 location and time basis risk. 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, future contracts and forward contracts of crude oil 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 unaudited notional quantities for commodity derivative instruments entered into (in thousands of barrels):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Sales	695	470	2,025	1,153
Purchases	805	380	2,095	1,066

We have not designated any of our commodity derivative instruments as accounting hedges. We record 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):

	September 30, 2013				December 31, 2012
	Assets		Liabilities		Assets		Liabilities
Commodity contracts	$	725	$	—	$	—	$	1,034

We have posted margin deposits as collateral with brokers who have the right of set off associated with these funds. Our margin accounts were in a net liability position at September 30, 2013 of $0.1 million. At December 31, 2012, our margin deposit balance was $1.9 million. 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 September 30, 2013 and December 31, 2012, we would have had net asset positions of $0.6 million and $0.8 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 September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Commodity contracts	$	(1,652	)	$	(631	)	$	(2,430	)	$	(342	)

Warrants

As described in Note 10, upon emergence from bankruptcy, we issued certain common stock warrants. These warrants are recorded at fair value in other noncurrent liabilities on the condensed consolidated balance sheets, with changes in the fair value recorded to other expense (income).

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Acquisition Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 60,676	$ 9,884
Mid-America Midstream Gas Services, L.L.C. [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	123,316
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	169,244
Goodwill	23,587
Total assets acquired	$ 316,147

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Segments

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

SEGMENTS

4. 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, other than White Cliffs and Glass Mountain, which have been included within the Crude segment. Our investment in NGL Energy is included within the SemStream segment. 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 and interest expenses incurred at the corporate level are allocated to the segments, based on our allocation policies in effect at the time.

	Three Months Ended September 30, 2013
	Crude		SemStream			SemCAMS		SemGas		SemLogistics			SemMexico			Corporate and Other			Consolidated
								(dollars in thousands)
Revenues:
External	$	181,831	$	—		$	48,979	$	59,220	$	2,169		$	65,549		$	—		$	357,748
Intersegment	—		—			—		6,575		—			—			(6,575		)	—
Total revenues	181,831		—			48,979		65,795		2,169			65,549			(6,575		)	357,748
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	157,550		—			106		48,403		—			56,070			(6,575		)	255,554
Operating	9,098		—			33,980		5,436		1,616			2,230			—			52,360
General and administrative	3,360		114			3,446		1,923		1,679			2,510			7,920			20,952
Depreciation and amortization	4,130		—			2,631		4,992		2,334			1,529			497			16,113
Loss (gain) on disposal of long-lived assets, net	—		—			—		679		—			(271		)	—			408
Total expenses	174,138		114			40,163		61,433		5,629			62,068			1,842			345,387
Earnings from equity method investments	10,771		(3,288		)	—		—		—			—			—			7,483
Operating income (loss)	18,464		(3,402		)	8,816		4,362		(3,460		)	3,481			(8,417		)	19,844
Other expenses (income), net	3,634		(1,238		)	4,720		880		(217		)	(21		)	5,536			13,294
Income (loss) from continuing operations before income taxes	$	14,830	$	(2,164	)	$	4,096	$	3,482	$	(3,243	)	$	3,502		$	(13,953	)	$	6,550
Total assets at September 30, 2013 (excluding intersegment receivables)	$	1,012,535	$	187,632		$	320,431	$	510,129	$	167,741		$	95,317		$	96,617		$	2,390,402

For the three months ended September 30, 2013, one customer from our Crude segment accounted for 13% of our total consolidated revenue.

	Three Months Ended September 30, 2012
	Crude			SemStream			SemCAMS		SemGas			SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	131,616		$	—		$	54,301	$	27,627		$	2,213		$	62,095		$	—		$	277,852
Intersegment	—			—			—		2,251			—			—			(2,251		)	—
Total revenues	131,616			—			54,301		29,878			2,213			62,095			(2,251		)	277,852
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	111,790			—			309		24,068			97			55,817			(2,251		)	189,830
Operating	6,042			7			40,081		2,931			1,436			1,870			—			52,367
General and administrative	5,015			528			3,354		1,329			990			1,501			3,963			16,680
Depreciation and amortization	3,066			—			2,664		1,797			2,388			1,536			630			12,081
Gain on disposal of long-lived assets, net	(3,500		)	—			—		(3		)	—			(112		)	—			(3,615		)
Total expenses	122,413			535			46,408		30,122			4,911			60,612			2,342			267,343
Earnings from equity method investments	10,021			(6,905		)	—		—			—			—			—			3,116
Operating income (loss)	19,224			(7,440		)	7,893		(244		)	(2,698		)	1,483			(4,593		)	13,625
Other expenses (income), net	(119		)	(2,551		)	3,419		(378		)	337			(82		)	11,075			11,701
Income (loss) from continuing operations before income taxes	$	19,343		$	(4,889	)	$	4,474	$	134		$	(3,035	)	$	1,565		$	(15,668	)	$	1,924

	Nine Months Ended September 30, 2013
	Crude			SemStream			SemCAMS		SemGas		SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	514,485		$	—		$	151,219	$	135,782	$	7,827		$	160,375		$	—		$	969,688
Intersegment	—			—			—		15,678		—			—			(15,678		)	—
Total revenues	514,485			—			151,219		151,460		7,827			160,375			(15,678		)	969,688
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	446,507			—			290		111,141		—			138,372			(15,678		)	680,632
Operating	20,527			1			116,372		13,869		5,303			6,741			—			162,813
General and administrative	10,778			430			10,933		5,112		4,285			7,175			16,174			54,887
Depreciation and amortization	11,327			—			7,925		9,353		6,987			4,467			1,504			41,563
Loss (gain) on disposal of long-lived assets, net	(25		)	6			—		673		—			(784		)	—			(130		)
Total expenses	489,114			437			135,520		140,148		16,575			155,971			2,000			939,765
Earnings from equity method investments	31,861			7,828			—		—		—			—			—			39,689
Operating income (loss)	57,232			7,391			15,699		11,312		(8,748		)	4,404			(17,678		)	69,612
Other expenses (income), net	10,925			(3,399		)	14,179		2,149		896			(339		)	27,358			51,769
Income (loss) from continuing operations before income taxes	$	46,307		$	10,790		$	1,520	$	9,163	$	(9,644	)	$	4,743		$	(45,036	)	$	17,843

For the nine months ended September 30, 2013, two customers from our Crude segment each accounted for 10% of our total consolidated revenue.

	Nine Months Ended September 30, 2012
	Crude			SemStream			SemCAMS		SemGas			SemLogistics			SemMexico			Corporate and Other			Consolidated
									(dollars in thousands)
Revenues:
External	$	468,748		$	7		$	169,149	$	81,917		$	8,610		$	193,229		$	—		$	921,660
Intersegment	—			—			—		7,535			—			—			(7,535		)	—
Total revenues	468,748			7			169,149		89,452			8,610			193,229			(7,535		)	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	412,847			33			499		70,607			196			174,636			(7,535		)	651,283
Operating	17,957			(18		)	135,165		9,092			4,521			6,033			—			172,750
General and administrative	9,796			582			10,404		4,564			4,249			6,730			16,748			53,073
Depreciation and amortization	9,032			—			7,910		5,153			7,040			4,614			1,938			35,687
Gain on disposal of long-lived assets, net	(3,444		)	—			—		(3		)	—			(49		)	—			(3,496		)
Total expenses	446,188			597			153,978		89,413			16,006			191,964			11,151			909,297
Earnings from equity method investments	25,053			(2,150		)	—		—			—			—			—			22,903
Operating income (loss)	47,613			(2,740		)	15,171		39			(7,396		)	1,265			(18,686		)	35,266
Other expenses (income), net	(739		)	(2,507		)	13,974		924			1,805			233			11,214			24,904
Income (loss) from continuing operations before income taxes	$	48,352		$	(233	)	$	1,197	$	(885	)	$	(9,201	)	$	1,032		$	(29,900	)	$	10,362

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Investments in Non-Consolidated Subsidiaries Investments in Non-Consolidated Subsidiaries (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Equity method investments	$ 518,149	$ 387,802
White Cliffs Pipeline L L C [Member]
Equity method investments	228,076	138,970
NGL Energy Partners LP [Member]
Equity method investments	187,632	174,398
Glass Mountain Pipeline Llc [Member]
Equity method investments	$ 102,441	$ 74,434

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Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2013

Debt disclosure

Summary of Long-Term Debt

Our long-term debt consisted of the following (in thousands):

	September 30, 2013		December 31, 2012
SemGroup 7.50% senior unsecured notes	$	300,000	$	—
SemGroup corporate revolving credit facility	155,000		201,500
Rose Rock credit facility	85,000		4,500
SemMexico credit facility	—		—
Capital leases	69		86
Total long-term debt	$	540,069	$	206,086
less: current portion of long-term debt	26		24
Noncurrent portion of long-term debt	$	540,043	$	206,062

Early Redemption Premium Percentages [Table Text Block]

Year	Percentage
2016	105.625%
2017	103.750%
2018	101.875%
2019 and thereafter	100.000%

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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2013

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):

	Nine Months Ended September 30,
	2013			2012
Decrease (increase) in restricted cash	$	451		$	4,691
Decrease (increase) in accounts receivable	(30,977		)	(116,987		)
Decrease (increase) in receivable from affiliates	(6,861		)	622
Decrease (increase) in inventories	(13,983		)	(1,804		)
Decrease (increase) in derivatives and margin deposits	1,972			457
Decrease (increase) in other current assets	2,269			8,393
Decrease (increase) in other assets	258			2,457
Increase (decrease) in accounts payable and accrued liabilities	50,614			97,638
Increase (decrease) in payable to affiliates	2,102			(5,160		)
Increase (decrease) in payables to pre-petition creditors	(416		)	(4,541		)
Increase (decrease) in other noncurrent liabilities	(1,349		)	2,942
	$	4,080		$	(11,292	)

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Related Party Transactions (Details) (NGL Energy [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
NGL Energy [Member]
Related Party Transaction
Revenues	$ 31,043	$ 14,395	$ 66,367	$ 41,945
Related Party Transaction, Purchases from Related Party	8,018	6,009	8,018	36,573
Reimbursements from NGL Energy for transition services	$ 60	$ 28	$ 156	$ 526

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Rose Rock Midstream, L.P. (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended		9 Months Ended	0 Months Ended					9 Months Ended	0 Months Ended					9 Months Ended	0 Months Ended					9 Months Ended	0 Months Ended						9 Months Ended	0 Months Ended					9 Months Ended	0 Months Ended					9 Months Ended	0 Months Ended						9 Months Ended	0 Months Ended
	Feb. 13, 2012 Distribution of Q4 2011 earnings (pro-rated) [Member]		Sep. 30, 2013 Distribution of Q4 2011 earnings (pro-rated) [Member]	Feb. 13, 2012 Distribution of Q4 2011 earnings (pro-rated) [Member] SemGroup [Member] Common Units [Member]	Feb. 13, 2012 Distribution of Q4 2011 earnings (pro-rated) [Member] SemGroup [Member] Subordinated Units [Member]	Feb. 13, 2012 Distribution of Q4 2011 earnings (pro-rated) [Member] Noncontrolling Interest [Member]	Feb. 13, 2012 Distribution of Q4 2011 earnings (pro-rated) [Member] SemGroup [Member]	May 15, 2012 Distribution of Q1 2012 earnings [Member]	Sep. 30, 2013 Distribution of Q1 2012 earnings [Member]	May 15, 2012 Distribution of Q1 2012 earnings [Member] SemGroup [Member] Common Units [Member]	May 15, 2012 Distribution of Q1 2012 earnings [Member] SemGroup [Member] Subordinated Units [Member]	May 15, 2012 Distribution of Q1 2012 earnings [Member] Noncontrolling Interest [Member]	May 15, 2012 Distribution of Q1 2012 earnings [Member] SemGroup [Member]	Aug. 14, 2012 Distribution of Q2 2012 earnings [Member]	Sep. 30, 2013 Distribution of Q2 2012 earnings [Member]	Aug. 14, 2012 Distribution of Q2 2012 earnings [Member] SemGroup [Member] Common Units [Member]	Aug. 14, 2012 Distribution of Q2 2012 earnings [Member] SemGroup [Member] Subordinated Units [Member]	Aug. 14, 2012 Distribution of Q2 2012 earnings [Member] Noncontrolling Interest [Member]	Aug. 14, 2012 Distribution of Q2 2012 earnings [Member] SemGroup [Member]	Nov. 14, 2012 Distribution of Q3 2012 earnings [Member]	Sep. 30, 2013 Distribution of Q3 2012 earnings [Member]	Nov. 14, 2012 Distribution of Q3 2012 earnings [Member] SemGroup [Member] Common Units [Member]	Nov. 14, 2012 Distribution of Q3 2012 earnings [Member] SemGroup [Member] Subordinated Units [Member]	Nov. 14, 2012 Distribution of Q3 2012 earnings [Member] Noncontrolling Interest [Member]	Nov. 14, 2012 Distribution of Q3 2012 earnings [Member] SemGroup [Member]	Nov. 14, 2012 Distribution of Q3 2012 earnings [Member] SemGroup [Member]	Feb. 14, 2013 Distribution of Q4 2012 earnings [Member]	Sep. 30, 2013 Distribution of Q4 2012 earnings [Member]	Feb. 14, 2013 Distribution of Q4 2012 earnings [Member] SemGroup [Member] Common Units [Member]	Feb. 14, 2013 Distribution of Q4 2012 earnings [Member] SemGroup [Member] Subordinated Units [Member]	Feb. 14, 2013 Distribution of Q4 2012 earnings [Member] Noncontrolling Interest [Member]	Feb. 14, 2013 Distribution of Q4 2012 earnings [Member] SemGroup [Member]	May 15, 2013 Distribution of Q1 2013 earnings [Member]	Sep. 30, 2013 Distribution of Q1 2013 earnings [Member]	May 15, 2013 Distribution of Q1 2013 earnings [Member] SemGroup [Member] Common Units [Member]	May 15, 2013 Distribution of Q1 2013 earnings [Member] SemGroup [Member] Subordinated Units [Member]	May 15, 2013 Distribution of Q1 2013 earnings [Member] Noncontrolling Interest [Member]	May 15, 2013 Distribution of Q1 2013 earnings [Member] SemGroup [Member]	Aug. 14, 2013 Distribution of Q2 2013 earnings [Member]	Sep. 30, 2013 Distribution of Q2 2013 earnings [Member]	Aug. 14, 2013 Distribution of Q2 2013 earnings [Member] SemGroup [Member] Common Units [Member]	Aug. 14, 2013 Distribution of Q2 2013 earnings [Member] SemGroup [Member] Subordinated Units [Member]	Aug. 14, 2013 Distribution of Q2 2013 earnings [Member] Noncontrolling Interest [Member]	Aug. 14, 2013 Distribution of Q2 2013 earnings [Member] SemGroup [Member]	Nov. 14, 2013 Distribution of Q3 2013 earnings [Member]		Sep. 30, 2013 Distribution of Q3 2013 earnings [Member]	Nov. 14, 2013 Distribution of Q3 2013 earnings [Member] SemGroup [Member] Common Units [Member]	Nov. 14, 2013 Distribution of Q3 2013 earnings [Member] SemGroup [Member] Subordinated Units [Member]	Nov. 14, 2013 Distribution of Q3 2013 earnings [Member] Noncontrolling Interest [Member]	Nov. 14, 2013 Distribution of Q3 2013 earnings [Member] SemGroup [Member]
Distributions paid or to be paid
Distribution per unit	$ 0.0670	[1]						$ 0.3725						$ 0.3825						$ 0.3925							$ 0.4025						$ 0.4300						$ 0.4400
Record Date			Feb. 03, 2012						May 07, 2012						Aug. 06, 2012						Nov. 05, 2012							Feb. 04, 2013						May 06, 2013						Aug. 05, 2013							Nov. 05, 2013
Distribution Date			Feb. 13, 2012						May 15, 2012						Aug. 14, 2012						Nov. 14, 2012							Feb. 14, 2013						May 15, 2013						Aug. 14, 2013							Nov. 14, 2013
Distribution Made to Limited Partner, Distributions Declared, Per Unit																																													$ 0.4500	[2]
Managing Member or General Partner, Subsequent Distribution Amount																																																			$ 232
General partner distributions							23						128						131						134							167						179						183
Incentive distributions							0						0						0							0						0						41						72							127
Limited partner distributions				93	561	470				517	3,125	2,607				532	3,209	2,678				545	3,294	2,748					1,163	3,377	3,624				1,242	3,607	3,872				1,271	3,692	3,962
Distribution Made to Limited Partner, Cash Distributions Declared																																																1,301	3,775	6,189
Partners' Capital Account, Distributions	$ 1,147							$ 6,377						$ 6,550						$ 6,721							$ 8,331						$ 8,941						$ 9,180						$ 11,624

[1] *Minimum quarterly distribution for quarter ended December 31, 2011 was prorated for the period beginning immediately after the closing of Rose Rock’s IPO, December 14, 2011 through December 31, 2011.

[2] **Expected payment date and amounts for distributions related to the quarter ended September 30, 2013.

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Supplemental Cash Flow Information Supplemental Cash Flow Information (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Sale of interest in equity investment to related party	$ 33,716,000	[1]
Tax effect of adjustment to APIC from sale of equity investment to less than wholly owned subsidiary	33,700,000
Warrants exercised during period	772,817
Proceeds from warrant exercises	225,000		0
Interest Paid	7,300,000		4,400,000
Income Taxes Paid, Net	6,600,000		5,500,000
Capital Expenditures Incurred but Not yet Paid	16,400,000		7,000,000
Accrued liabilities	81,509,000			63,831,000
Noncontrolling Interest [Member]
Sale of interest in equity investment to related party	90,516,000	[1]
Additional Paid-in Capital [Member]
Sale of interest in equity investment to related party	(56,800,000)	[1]
Warrant [Member]
Stock Issued During Period, Shares, Conversion of Convertible Securities	425,618
Adjustments to Additional Paid in Capital, Other	23,500,000
Semcrude Pipeline [Member]
Equity Method Investment, Ownership Percentage	33.00%
Goodwill related to unpaid invoices representing purchase price adjustments [Member]
Accrued liabilities	$ 9,000,000

[1] * On January 13, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. to our consolidated subsidiary, Rose Rock. As this transaction was between entities under common control, the interest in SemCrude Pipeline, L.L.C. was recorded by Rose Rock based on SemGroup's book value. This amount represents the purchase price in excess of book value which was attributed to the noncontrolling interest owners of Rose Rock. The entry to additional paid-in capital has been recorded net of tax.

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Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Taxes (Textual) [Abstract]
U.S. federal statutory rate			35.00%
Valuation Allowance, Deferred Tax Asset, Change in Amount			$ (50.9)
Effective Income Tax Rate, Continuing Operations	52.00%	109.00%	(231.00%)	10.00%
Semcrude Pipeline [Member]
Income Taxes (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	33.00%		33.00%
Foreign Tax Authority [Member]
Income Taxes (Textual) [Abstract]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 3.3

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Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Fair Value of Financial Assets and Liabilities
Total assets	$ 725
Total liabilities	46,350		33,892
Net assets (liabilities) at fair value	(45,625)		(33,892)
Level 1 [Member]
Fair Value of Financial Assets and Liabilities
Total assets	857		22
Total liabilities	46,482		33,914
Net assets (liabilities) at fair value	(45,625)		(33,892)
Netting [Member]
Fair Value of Financial Assets and Liabilities
Total assets	(132)	[1]	(22)	[1]
Total liabilities	(132)	[1]	(22)	[1]
Net assets (liabilities) at fair value		[1]		[1]
Commodity Derivatives [Member]
Fair Value of Financial Assets and Liabilities
Total assets	725		0
Total liabilities	0		1,034
Commodity Derivatives [Member] | Level 1 [Member]
Fair Value of Financial Assets and Liabilities
Total assets	857		22
Total liabilities	132		1,056
Commodity Derivatives [Member] | Netting [Member]
Fair Value of Financial Assets and Liabilities
Total assets	(132)	[1]	(22)	[1]
Total liabilities	(132)	[1]	(22)	[1]
Warrants [Member]
Fair Value of Financial Assets and Liabilities
Total liabilities	46,350		32,858
Warrants [Member] | Level 1 [Member]
Fair Value of Financial Assets and Liabilities
Total liabilities	46,350		32,858
Warrants [Member] | Netting [Member]
Fair Value of Financial Assets and Liabilities
Total liabilities		[1]		[1]

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

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Investments in Non-Consolidated Subsidiaries Investments in Non-Consolidated Subsidiaries (Details 4) (NGL Energy Partners LP [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
NGL Energy Partners LP [Member]
Summarized income statement information
Equity Method Investment, Summarized Financial Information, Revenue	$ 1,385,957	$ 326,436	$ 4,341,778	$ 1,236,023
Cost of Goods Sold	1,303,076	298,985	3,989,511	1,128,581
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses	67,499	33,298	206,824	76,015
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense	22,724	9,227	68,989	21,260
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ (17,508)	$ (24,710)	$ 45,310	$ (4,678)

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,728	$ 3,687
Accumulated depreciation	167,584	130,886
Accumulated amortization	$ 9,521	$ 6,701

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

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”).

(a) Confirmation order appeal

Luke Oil appeal. On October 21, 2009, Luke Oil Company, C&S Oil/Cross Properties, Inc., Wayne Thomas Oil and Gas and William R. Earnhardt Company (collectively, “Luke Oil”) filed an objection to the Plan of Reorganization “to the extent that the Plan of Reorganization may alter, impair, or otherwise adversely affect Luke Oil’s legal rights or other interests.” On October 28, 2009, the bankruptcy court overruled the Luke Oil objection and entered the confirmation order. On November 6, 2009, Luke Oil filed a Notice of Appeal. On December 23, 2009, Luke Oil’s appeal was docketed in the United States District Court for the District of Delaware. We filed a motion to dismiss the appeal as equitably moot. On May 21, 2012, the District Court entered an order granting our motion to dismiss Luke Oil's appeal of the confirmation order. On June 18, 2012, Luke Oil filed its Notice of Appeal, notifying the District Court and the parties to the lawsuit that it was appealing the decision of the District Court to the United States Court of Appeals for the Third Circuit. On August 27, 2013, the United States Court of Appeals for the Third Circuit issued an opinion, and on September 18, 2013 issued a judgment, reversing the District Court’s dismissal of the confirmation order and remanding the case to the District Court for consideration on the merits of Luke Oil’s appeal of the confirmation order. On October 1, 2013, at the request of the parties, the District Court entered an order staying the case and referring it to a magistrate judge for mediation. While we believe that this action is without merit and are vigorously defending this matter on appeal, an adverse ruling on this action could have a material adverse impact on us.

(b) Investigations

Around the time of our predecessor's bankruptcy filings, several governmental agencies launched investigations regarding the circumstances of the filings. The mandate and scope of these investigations were very broad and the investigations are ongoing.

Bankruptcy examiner. On October 14, 2008, the bankruptcy court appointed an examiner to (i) investigate the circumstances surrounding our predecessor's trading strategy prior to bankruptcy filings; (ii) investigate the circumstances surrounding certain insider transactions and the formation of SemGroup Energy Partners L.P. (a former subsidiary); (iii) investigate the circumstances surrounding the potential improper use of borrowed funds and funds generated from operations and the liquidation of assets to satisfy margin calls related to our predecessor's trading strategy and that of certain entities owned or controlled by former officers and directors of the general partner of SemGroup, L.P.; (iv) determine whether any directors, officers or employees of the general partner of SemGroup, L.P. participated in fraud, dishonesty, incompetence, misconduct, mismanagement, or irregularity in the management of our affairs; and (v) determine whether the SemGroup debtor estates have causes of action against current or former officers, directors, or employees of the general partner of SemGroup, L.P. arising from such participation. The examiner’s report was filed with the bankruptcy court on April 15, 2009.

Certain current and prior employees of the general partner of SemGroup, L.P. are referenced in the examiner’s report and the report’s conclusions may suggest possible civil or criminal liability on their part. To the extent such claims exist, they are property of a litigation trust that was established for the benefit of pre-petition creditors pursuant to the Plan of Reorganization, and are not property of the reorganized SemGroup Corporation. This litigation trust is pursuing claims against certain former officers, at its own expense. We may incur expenses, which are not expected to be material, related to information and document requests of the litigation trust related to such claims. Any indemnification obligations to such officers by SemGroup, L.P. were discharged under the Plan of Reorganization.

CFTC. On June 19, 2008, we received a request for voluntary production from the Commodity Futures Trading Commission (“CFTC”). Subsequent to the bankruptcy filings, the CFTC sent other requests for voluntary production. The CFTC has also served subpoenas upon us requiring us to produce various documents and for the depositions of our representatives. We continue to comply with the CFTC’s requests. We are unaware of any currently pending formal charges against us by the CFTC.

(c) Claims reconciliation process

A large number of parties have made claims against us for obligations alleged to have been incurred prior to our predecessor's bankruptcy filing. On September 15, 2010, the bankruptcy court entered an order estimating the contingent, unliquidated and disputed claims and authorizing distributions to holders of allowed claims. Pursuant to that order we have begun making distributions to the claimants. We continue to attempt to settle unresolved claims.

Pursuant to the Plan of Reorganization, we committed to settle authorized and allowed bankruptcy claims by paying a specified amount of cash, issuing a specified number of warrants, and issuing a specified number of shares of SemGroup Corporation common stock. We do not believe the resolution of the remaining outstanding claims will exceed the total amount of consideration established under the Plan of Reorganization for all claimants; instead, the resolution of the remaining claims in some cases will impact the relative share of the established pool of common stock and warrants that certain claimants receive.

However, under certain circumstances we could be required to pay additional funds to settle the specified group of claims to be settled with cash. Pursuant to the Plan of Reorganization, a specified amount of restricted cash was set aside at the Emergence Date, which we expect to be sufficient to settle this group of claims. Since the Emergence Date, we have made significant progress in resolving these claims, and we continue to believe that the cash set aside at the Emergence Date will be sufficient to settle these claims. However, we have not yet reached a resolution of all of these claims, and if the total settlement amount of all of these claims exceeds the specified amount, we will be required to pay additional funds to satisfy the total settlement amount for this specified group of claims. If this were to become probable of occurring, we would be required to record a liability and a corresponding expense.

Blueknight claim

Blueknight Energy Partners, L.P. (“Blueknight”), which was formerly a subsidiary of SemGroup, together with other entities related to Blueknight, entered into a Shared Services Agreement on April 7, 2009, with SemCrude, L.P., now known as Rose Rock Midstream Crude, L.P. (“SemCrude”) and SemManagement, L.L.C. (which are currently subsidiaries of SemGroup). The services provided by SemCrude to Blueknight under this agreement included assisting Blueknight with movement of crude oil belonging to Blueknight’s customers and with the operation of Blueknight’s Oklahoma pipeline system and its Cushing, Oklahoma terminal. Under the subsequent amendments to the agreements beginning in May 2010, certain of these services were phased out, and Blueknight began to perform all services necessary for the movement of its crude oil and the operation of its Cushing terminal without SemCrude’s assistance.

In a letter dated August 18, 2011, Blueknight claimed that SemCrude owes Blueknight approximately 141,000 barrels of crude oil. We responded to Blueknight’s letter denying their charges and requesting documentation from Blueknight of its claim. On February 14, 2012, after months of interaction between the parties through which Blueknight was requested to substantiate its claim, Blueknight filed suit against SemCrude and other related companies in the District Court of Oklahoma County, Oklahoma. On May 1, 2012, the case was transferred to Tulsa County, Oklahoma. On July 2, 2012, the Tulsa County District Court appointed a Special Master to review terminal operations accounting records and determine whether 141,000 barrels of crude oil owned by Blueknight is missing after three months of operations in April through June, 2010. On June 11, 2013, the Special Master’s Report was filed with the District Court finding a shortage in Blueknight’s Cushing terminal and Oklahoma pipeline system of 148,000 barrels. However, after a review of all records created during that three month time period, the Special Master was unable to determine how the shortage might have occurred and she was unable to determine the ownership of the potential shortage.

We are currently seeking discovery in the District Court of documentation and testimony on the potential cause and the impact, if any, of the shortage found by the Special Master. Blueknight is resisting discovery and has asked for summary judgment against SemCrude and the other defendants for the entire terminal and pipeline system shortage. 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 and one owned by SemGas) that KDHE believes, based on their historical use, may have 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 and results indicate that four of the sites have limited amounts of soil contamination that will require remediation and ground water contamination that may require further delineation and/or ongoing monitoring. Work plans have been submitted to, and approved by, the KDHE. We do not anticipate any penalties or fines for these historical sites.

A water pipeline break occurred at a SemCAMS facility during August 2010. This resulted in a spill of material that was predominantly salt water containing a small amount of hydrocarbons. The incident was investigated by Environment Canada and Alberta Environment. On February 14, 2012, charges were filed against SemCAMS by the Federal Government of Canada (Department of Fisheries) and the Province of Alberta (Alberta Environment) in connection with this incident. SemCAMS and the Federal and Provincial Crowns are discussing a resolution of the charges on specific terms. We expect that the matter will be finally resolved by the end of the year. We accrued a liability for estimated fines and environmental contributions of $0.4 million in December 2010, which we still carry on our books at September 30, 2013.

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. We have recorded an asset retirement obligation liability of $42.1 million at September 30, 2013, which is included within other noncurrent liabilities on our condensed consolidated balance sheets. This amount was calculated using the $104.6 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 September 30, 2013, such commitments included the following (in thousands):

	Volume (Barrels)	Value
Fixed price purchases	202	$	20,324
Fixed price sales	330	$	34,749
Floating price purchases	18,016	$	1,781,247
Floating price sales	18,600	$	1,814,662

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 began in July 2011 and continues through June 2023, subsequent to the extension of the agreement in the second quarter of 2013. At September 30, 2013, approximately $25.8 thousand was due under the contract and the amount of future obligation is approximately $88.2 million. 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.

See Note 3 for commitments related to Glass Mountain Pipeline LLC and the White Cliffs expansion project.

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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 59,213	$ 8,921
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized (gain) loss related to derivative instruments	(1,759)	(432)
Depreciation and amortization	41,563	35,687
Depreciation, Depletion and Amortization, Nonproduction		36,123
Loss (gain) on disposal of long-lived assets, net	(107)	(3,496)
Earnings from equity method investments	(39,689)	(22,903)
Distributions from equity investments	39,714	25,053
Amortization of debt issuance costs	1,943	2,078
Deferred tax benefit	(49,448)	(3,738)
Non-cash equity compensation	5,311	4,832
Fair value adjustment of warrants	37,028	17,082
Provision for uncollectible accounts receivable, net of recoveries	(357)	(828)
Foreign currency transaction (gain) loss	(973)	358
Changes in operating assets and liabilities (Note 12)	4,080	(11,292)
Net cash provided by operating activities	96,519	51,758
Cash flows from investing activities:
Capital expenditures	(131,650)	(82,123)
Proceeds from sale of long-lived assets	1,048	347
Investments in non-consolidated subsidiaries	(143,463)	(63,999)
Payments to acquire businesses	(356,201)	0
Proceeds from sale of non-consolidated affiliate	0	3,500
Distributions in excess of equity in earnings of affiliates	13,091	10,569
Net cash used in investing activities	(617,175)	(131,706)
Cash flows from financing activities:
Debt issuance costs	(11,865)	(694)
Borrowings on credit facilities	928,474	260,500
Principal payments on credit facilities and other obligations	(594,403)	(179,001)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	210,226	0
Distributions to noncontrolling interests	(11,458)	(5,754)
Proceeds from warrant exercises	225	0
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(371)	(242)
Payments of dividends	(16,387)	0
Net cash provided by financing activities	504,441	74,809
Effect of exchange rate changes on cash and cash equivalents	904	(977)
Change in cash and cash equivalents	(15,311)	(6,116)
Change in cash and cash equivalents included in discontinued operations	0	(36)
Change in cash and cash equivalents from continuing operations	(15,311)	(6,152)
Cash and cash equivalents at beginning of period	80,029	73,613
Cash and cash equivalents at end of period	$ 64,718	$ 67,461

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Long-Term Debt (Details Textual)	9 Months Ended			3 Months Ended	9 Months Ended							9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended									9 Months Ended				0 Months Ended				3 Months Ended	0 Months Ended	3 Months Ended		9 Months Ended					9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2013 Senior Notes [Member] USD ($)	Sep. 30, 2013 Senior Notes [Member] USD ($)	Sep. 30, 2013 sale of stock [Member]	Sep. 30, 2013 Registration Payment Arrangement, Arrangement [Domain]	Sep. 30, 2013 Registration Payment Arrangement, Arrangement [Domain] Minimum [Member]	Sep. 30, 2013 Registration Payment Arrangement, Arrangement [Domain] Maximum [Member]	Sep. 30, 2013 Corporate [Member] USD ($)	Dec. 31, 2012 Corporate [Member] USD ($)	Sep. 30, 2013 Corporate [Member] Letter of Credit [Member] USD ($)	Sep. 30, 2013 Corporate [Member] Letter of Credit [Member] Maximum [Member] USD ($)	May 31, 2013 Corporate [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Corporate [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2012 Corporate [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Corporate [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2012 Corporate [Member] Revolving Credit Facility [Member] USD ($)	May 03, 2013 Corporate [Member] Revolving Credit Facility [Member] USD ($)	Apr. 22, 2013 Corporate [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Corporate [Member] Revolving Credit Facility [Member] Maximum [Member] USD ($)	Sep. 30, 2013 SemMexico [Member] USD ($)	Dec. 31, 2012 SemMexico [Member] USD ($)	Sep. 30, 2013 SemMexico [Member] Letter of Credit [Member] USD ($)	Sep. 30, 2013 SemMexico [Member] Letter of Credit [Member] MXN	Sep. 30, 2013 SemMexico [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 SemMexico [Member] Revolving Credit Facility [Member] MXN	Sep. 30, 2013 SemMexico [Member] Revolving Credit Agreements [Member] Additional Credit Agreement [Member] USD ($)	Sep. 30, 2013 SemMexico [Member] Revolving Credit Agreements [Member] Additional Credit Agreement [Member] MXN	Jan. 11, 2013 Rose Rock Midstream L P [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] USD ($)	Dec. 31, 2012 Rose Rock Midstream L P [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Bilateral Letter of Credit [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Letter of Credit [Member] USD ($)	Jan. 11, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2012 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2012 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] USD ($)	Jan. 13, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] Eurodollar Rate Borrowings [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] Alternate Base Rate Borrowings [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] Minimum [Member]	Sep. 30, 2013 Rose Rock Midstream L P [Member] Revolving Credit Facility [Member] Maximum [Member]	Sep. 30, 2013 Rose Rock Midstream L P [Member] 1.75% Letter of Credit [Member] Bilateral Letter of Credit [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] 2.0% Letter of Credit [Member] Bilateral Letter of Credit [Member] USD ($)	Sep. 30, 2013 Rose Rock Midstream L P [Member] Debt issuance [Member] Subordinated Debt [Member] USD ($)	Sep. 30, 2013 Semcrude Pipeline [Member]
Debt Instrument [Line Items]
Senior Notes	$ 300,000,000		$ 0
Debt Instrument, Interest Rate, Stated Percentage				7.50%	7.50%
Proceeds from Issuance of Senior Long-term Debt	294,000,000
Senior Notes Redemable Prior to June 15, 2016	35.00%
Early Redemption Premium on Senior Notes Redeemed Prior to June 15, 2016	1.00%					107.50%
Basis point adjustment to discount rate	50
Redemption premium on senior notes in the event of a change in control	101.00%
Interest rate increase							0.25%	0.25%	1.00%
Interest expense recorded				6,000,000	7,100,000										2,300,000	1,700,000	5,000,000	4,900,000																		1,900,000	500,000	6,100,000	1,400,000
Unamortized debt costs				6,400,000	6,400,000										4,800,000		4,800,000																			3,700,000		3,700,000
Maximum borrowing capacity													250,000,000		500,000,000		500,000,000				500,000,000					3,300,000	44,000,000	4,300,000	56,000,000											385,000,000
Borrowings outstanding										155,000,000	201,500,000				155,000,000		155,000,000					0	0			0			0		85,000,000	4,500,000									30,000,000	55,000,000
Letters of credit outstanding												4,500,000												22,300,000	292,800,000								7,600,000	31,800,000											600,000	7,000,000
Interest rate in effect												3.25%			5.50%		5.50%							0.50%	0.50%									2.25%							2.53%	4.50%			1.75%	2.00%
Percentage of line of credit facility fronting fee												0.25%																						0.25%
Commitment fee on unused capacity																	0.50%																										0.375%	0.50%
Line of Credit Facility, Maximum Borrowing Incremental Increases																				300,000,000	100,000,000															200,000,000		200,000,000
Senior Unsecured Indebtedness Threshold																				200,000,000
Line of Credit Facility, Incremental Increase																			200,000,000
Proceeds from Lines of Credit																														133,500,000					133,500,000
Equity Method Investment, Ownership Percentage																																																33.00%
Debt Issuance Cost														2,200,000																								1,600,000
Minimum aggregate issuance to elect alternative financial covenants																																															200,000,000
Margin added to Prime Rate to determine effective interest rate																										2.00%	2.00%	1.70%	1.70%
Interest Costs Capitalized	2,900,000	200,000
Long-term Debt, Fair Value	$ 306,000,000

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 64,718	$ 80,029
Restricted cash	34,182	34,678
Accounts receivable, net	368,246	346,169
Receivable from affiliates	13,039	6,178
Inventories	46,609	34,433
Other current assets	15,167	18,516
Total current assets	541,961	520,003
Property, plant and equipment, net	1,057,116	814,724
Equity method investments	518,149	387,802
Goodwill	60,676	9,884
Other intangible assets, net	179,897	7,585
Other noncurrent assets, net	32,603	8,181
Total assets	2,390,402	1,748,179
Current liabilities:
Accounts payable	303,672	253,623
Payable to affiliates	2,102	0
Accrued liabilities	81,509	63,831
Payables to pre-petition creditors	32,372	32,933
Deferred revenue	18,835	18,973
Other current liabilities	9,120	4,960
Current portion of long-term debt	26	24
Total current liabilities	447,636	374,344
Long-term debt	540,043	206,062
Deferred income taxes	53,588	65,620
Other noncurrent liabilities	95,418	80,625
Commitments and contingencies (Note 9)
SemGroup owners' equity:
Common stock (Note 10)	425	420
Additional paid-in capital	1,108,041	1,039,189
Treasury stock, at cost (Note 10)	(613)	(242)
Accumulated deficit	(100,890)	(145,674)
Accumulated other comprehensive loss	(5,606)	(1,299)
Total SemGroup owners' equity	1,001,357	892,394
Noncontrolling interests in consolidated subsidiaries	252,360	129,134
Total owners' equity	1,253,717	1,021,528
Total liabilities and owners' equity	$ 2,390,402	$ 1,748,179

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Financial Instruments (Details 2)	3 Months Ended		9 Months Ended
	Sep. 30, 2013 bbl	Sep. 30, 2012 bbl	Sep. 30, 2013 bbl	Sep. 30, 2012 bbl
Sales [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	695,000	470,000	2,025,000	1,153,000
Purchases [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	805,000	380,000	2,095,000	1,066,000

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Acquisition Acquisition (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Acquisitions [Abstract]
Goodwill	$ 60,676	$ 9,884
Goodwill, Acquired During Period	50,848
Goodwill, Translation Adjustments	$ (56)

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

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 September 30, 2013, such commitments included the following (in thousands):

	Volume (Barrels)	Value
Fixed price purchases	202	$	20,324
Fixed price sales	330	$	34,749
Floating price purchases	18,016	$	1,781,247
Floating price sales	18,600	$	1,814,662

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Rose Rock Midstream, L.P. (Tables)

9 Months Ended

Sep. 30, 2013

Investments in and Advances to Affiliates, Schedule of Investments [Abstract]

Quarterly Target Distributions

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. Rose Rock’s partnership agreement requires Rose Rock to distribute all of its available cash each quarter in the following manner:

	Total Quarterly Distributions Per Unit Target Amount						Marginal Percentage Interest in Distributions
							Unitholders		General Partner		Incentive Distribution Rights
Minimum Quarterly Distributions					$	0.362500	98.0	%	2.0	%	—
First Target Distribution	above	$	0.362500	up to	$	0.416875	98.0	%	2.0	%	—
Second Target Distribution	above	$	0.416875	up to	$	0.453125	85.0	%	2.0	%	13.0	%
Third Target Distribution	above	$	0.453125	up to	$	0.543750	75.0	%	2.0	%	23.0	%
Thereafter				above	$	0.543750	50.0	%	2.0	%	48.0	%

Distributions Paid and Declared

The following table shows the cash distributions paid or declared during 2013 and 2012 (in thousands, except for per unit amounts):

		Record Date	Payment Date	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, 2011	*	February 3, 2012	February 13, 2012	$	0.0670	*	$	23	$	—	$	93	$	561	$	470	$	1,147
March 31, 2012		May 7, 2012	May 15, 2012	$	0.3725		$	128	$	—	$	517	$	3,125	$	2,607	$	6,377
June 30, 2012		August 6, 2012	August 14, 2012	$	0.3825		$	131	$	—	$	532	$	3,209	$	2,678	$	6,550
September 30, 2012		November 5, 2012	November 14, 2012	$	0.3925		$	134	$	—	$	545	$	3,294	$	2,748	$	6,721
December 31, 2012		February 4, 2013	February 14, 2013	$	0.4025		$	167	$	—	$	1,163	$	3,377	$	3,624	$	8,331
March 31, 2013		May 6, 2013	May 15, 2013	$	0.4300		$	179	$	41	$	1,242	$	3,607	$	3,872	$	8,941
June 30, 2013		August 5, 2013	August 14, 2013	$	0.4400		$	183	$	72	$	1,271	$	3,692	$	3,962	$	9,180
September 30, 2013	**	November 5, 2013	November 14, 2013	$	0.4500	**	$	232	$	127	$	1,301	$	3,775	$	6,189	$	11,624

*Minimum quarterly distribution for quarter ended December 31, 2011 was prorated for the period beginning immediately after the closing of Rose Rock’s IPO, December 14, 2011 through December 31, 2011.

**Expected payment date and amounts for distributions related to the quarter ended September 30, 2013.

Summarized Balance Sheet Information

Certain summarized balance sheet information of Rose Rock is shown below (in thousands):

	(unaudited)
	September 30, 2013		December 31, 2012
Cash	$	1,914	$	108
Other current assets	292,386		250,509
Property, plant and equipment, net	313,193		291,530
Equity method investment	77,449		—
Goodwill	27,261		—
Other noncurrent assets, net	10,536		2,579
Total assets	$	722,739	$	544,726
Current liabilities	$	254,491	$	231,843
Long-term debt	85,043		4,562
Partners’ capital attributable to SemGroup	130,845		179,187
Partners’ capital attributable to noncontrolling interests	252,360		129,134
Total liabilities and partners’ capital	$	722,739	$	544,726

Summarized Income Statement Information

Certain summarized income statement information of Rose Rock for the three months and nine months ended September 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	181,831	$	131,554	$	514,485	$	468,687
Cost of products sold	$	157,550	$	111,790	$	446,507	$	412,847
Operating, general and administrative expenses	$	12,394	$	9,779	$	30,434	$	25,976
Depreciation and amortization expense	$	4,130	$	3,066	$	11,327	$	9,032
Earnings from equity method investment	$	3,527	$	—	$	10,431	$	—
Net income	$	9,411	$	6,469	$	30,539	$	19,353

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Investments in Non-Consolidated Subsidiaries (Details 3) (White Cliffs Pipeline L L C [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
White Cliffs Pipeline L L C [Member]
Summarized income statement information
Equity Method Investment, Summarized Financial Information, Revenue	$ 31,453	$ 28,522	$ 92,238	$ 76,910
Equity Method Investment, Summarized Financial Information, Operating, General and Administrative Expenses	5,141	3,857	14,433	11,382
Equity Method Investment, Summarized Financial Information, Depreciation and Amortization Expense	4,720	4,995	14,150	14,964
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ 21,579	$ 19,670	$ 63,642	$ 50,564

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Condensed Consolidating Guarantor Financial Statements Condensed Consolidating Guarantor Financial Statements (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 64,718,000	$ 67,461,000	$ 64,718,000	$ 67,461,000	$ 80,029,000	$ 73,613,000
Restricted Cash and Cash Equivalents, Current	34,182,000		34,182,000		34,678,000
Accounts receivable, net	368,246,000		368,246,000		346,169,000
Receivable from affiliates	13,039,000		13,039,000		6,178,000
Inventories	46,609,000		46,609,000		34,433,000
Other Assets, Current	15,167,000		15,167,000		18,516,000
Total current assets	541,961,000		541,961,000		520,003,000
Property, plant and equipment, net	1,057,116,000		1,057,116,000		814,724,000
Equity method investments	518,149,000		518,149,000		387,802,000
Goodwill	60,676,000		60,676,000		9,884,000
Other intangible assets, net	179,897,000		179,897,000		7,585,000
Other noncurrent assets, net	32,603,000		32,603,000		8,181,000
Total assets	2,390,402,000		2,390,402,000		1,748,179,000
Accounts Payable, Current	303,672,000		303,672,000		253,623,000
Payable to affiliates	2,102,000		2,102,000		0
Accrued liabilities	81,509,000		81,509,000		63,831,000
Payables to pre-petition creditors	32,372,000		32,372,000		32,933,000
Deferred revenue	18,835,000		18,835,000		18,973,000
Other Liabilities, Current	9,120,000		9,120,000		4,960,000
Current portion of long-term debt	26,000		26,000		24,000
Total current liabilities	447,636,000		447,636,000		374,344,000
Long-term Debt and Capital Lease Obligations	540,043,000		540,043,000		206,062,000
Deferred Tax Liabilities, Net, Noncurrent	53,588,000		53,588,000		65,620,000
Other Liabilities, Noncurrent	95,418,000		95,418,000		80,625,000
Commitments and contingencies
Stockholders' Equity Attributable to Parent	1,001,357,000		1,001,357,000		892,394,000
Noncontrolling interests in consolidated subsidiaries	252,360,000		252,360,000		129,134,000
Total owners' equity	1,253,717,000		1,253,717,000		1,021,528,000
Total liabilities and owners' equity	2,390,402,000		2,390,402,000		1,748,179,000
Product Revenue	288,452,000	209,202,000	765,334,000	708,408,000
Sales Revenue, Services, Other	36,402,000	29,800,000	95,737,000	86,727,000
Other Revenue, Net	32,894,000	38,850,000	108,617,000	126,525,000
Total revenues	357,748,000	277,852,000	969,688,000	921,660,000
Costs of products sold, exclusive of depreciation and amortization shown below	255,554,000	189,830,000	680,632,000	651,283,000
Operating Costs and Expenses	52,360,000	52,367,000	162,813,000	172,750,000
General and administrative	20,952,000	16,680,000	54,887,000	53,073,000
Depreciation and amortization	16,113,000	12,081,000	41,563,000	35,687,000
Loss (gain) on disposal of long-lived assets, net	408,000	(3,615,000)	(130,000)	(3,496,000)
Total expenses	345,387,000	267,343,000	939,765,000	909,297,000
Earnings from equity method investments	7,483,000	3,116,000	39,689,000	22,903,000
Operating income	19,844,000	13,625,000	69,612,000	35,266,000
Interest Expense	9,080,000	1,992,000	15,971,000	7,763,000
Foreign currency transaction (gain) loss	(457,000)	355,000	(973,000)	358,000
Other Nonoperating Income (Expense)	4,671,000	9,354,000	36,771,000	16,783,000
Total other expenses, net	13,294,000	11,701,000	51,769,000	24,904,000
Income (loss) from continuing operations before income taxes	6,550,000	1,924,000	17,843,000	10,362,000
Income tax expense (benefit)	3,413,000	2,091,000	(41,305,000)	985,000
Income (loss) from continuing operations	3,137,000	(167,000)	59,148,000	9,377,000
Income (loss) from discontinued operations, net of income taxes	(2,000)	(265,000)	65,000	(456,000)
Net income (loss)	3,135,000	(432,000)	59,213,000	8,921,000
Net Income (Loss) Attributable to Noncontrolling Interest	5,054,000	2,336,000	14,429,000	7,915,000
Net income (loss) attributable to SemGroup	(1,919,000)	(2,768,000)	44,784,000	1,006,000
Other Comprehensive Income (Loss), Net of Tax	6,105,000	12,072,000	(4,307,000)	14,930,000
Comprehensive income	9,240,000	11,640,000	54,906,000	23,851,000
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	5,054,000	2,336,000	14,429,000	7,915,000
Comprehensive income attributable to SemGroup	4,186,000	9,304,000	40,477,000	15,936,000
Net Cash Provided by (Used in) Operating Activities			96,519,000	51,758,000
Payments to Acquire Property, Plant, and Equipment			(131,650,000)	(82,123,000)
Proceeds from sale of long-lived assets			1,048,000	347,000
Proceeds from Divestiture of Businesses			0
Payments to Acquire Equity Method Investments			(143,463,000)	(63,999,000)
Payments to acquire businesses			(356,201,000)	0
Proceeds from sale of non-consolidated affiliate			0	3,500,000
Distributions in excess of equity in earnings of affiliates			13,091,000	10,569,000
Net cash used in investing activities			(617,175,000)	(131,706,000)
Payments of Debt Issuance Costs			(11,865,000)	(694,000)
Proceeds from Issuance of Long-term Debt and Capital Securities, Net			928,474,000	260,500,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities			(594,403,000)	(179,001,000)
Proceeds from Issuance of Common Limited Partners Units			210,226,000	0
Distributions to noncontrolling interests			(11,458,000)	(5,754,000)
Proceeds from warrant exercises			225,000	0
Payments for Repurchase of Other Equity			(371,000)	(242,000)
Payments of dividends			16,387,000	0
Intercompany borrowings (advances), net			0	0
Net cash provided by financing activities			504,441,000	74,809,000
Effect of exchange rate changes on cash and cash equivalents			904,000	(977,000)
Change in cash and cash equivalents			(15,311,000)	(6,116,000)
Change in cash and cash equivalents included in discontinued operations			0	(36,000)
Change in cash and cash equivalents from continuing operations			(15,311,000)	(6,152,000)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	9,711,000	5,860,000	9,711,000	5,860,000	19,123,000	111,000
Restricted Cash and Cash Equivalents, Current	32,880,000		32,880,000		33,324,000
Accounts receivable, net	640,000		640,000		1,155,000
Receivable from affiliates	752,000		752,000		827,000
Inventories	0		0		0
Other Assets, Current	2,417,000		2,417,000		2,528,000
Total current assets	46,400,000		46,400,000		56,957,000
Property, plant and equipment, net	4,521,000		4,521,000		5,399,000
Equity method investments	1,475,019,000		1,475,019,000		1,104,832,000
Goodwill	0		0		0
Other intangible assets, net	32,000		32,000		36,000
Other noncurrent assets, net	19,745,000		19,745,000		3,606,000
Total assets	1,545,717,000		1,545,717,000		1,170,830,000
Accounts Payable, Current	104,000		104,000		70,000
Payable to affiliates	14,000		14,000
Accrued liabilities	14,715,000		14,715,000		8,972,000
Payables to pre-petition creditors	32,317,000		32,317,000		32,876,000
Deferred revenue	0		0		0
Other Liabilities, Current	97,000		97,000		134,000
Current portion of long-term debt	0		0		0
Total current liabilities	47,247,000		47,247,000		42,052,000
Long-term Debt and Capital Lease Obligations	455,000,000		455,000,000		201,500,000
Deferred Tax Liabilities, Net, Noncurrent	976,000		976,000		2,018,000
Other Liabilities, Noncurrent	46,358,000		46,358,000		32,866,000
Commitments and contingencies
Stockholders' Equity Attributable to Parent	996,136,000		996,136,000		892,394,000
Noncontrolling interests in consolidated subsidiaries	0		0		0
Total owners' equity	996,136,000		996,136,000		892,394,000
Total liabilities and owners' equity	1,545,717,000		1,545,717,000		1,170,830,000
Product Revenue	0	0	0	0
Sales Revenue, Services, Other	0	0	0	0
Other Revenue, Net	0	0	0	0
Total revenues	0	0	0	0
Costs of products sold, exclusive of depreciation and amortization shown below	0	0	0	0
Operating Costs and Expenses	0	0	0	0
General and administrative	7,855,000	3,840,000	15,983,000	16,528,000
Depreciation and amortization	497,000	628,000	1,504,000	1,938,000
Loss (gain) on disposal of long-lived assets, net	0	0	0	0
Total expenses	8,352,000	4,468,000	17,487,000	18,466,000
Earnings from equity method investments	15,497,000	14,201,000	52,432,000	36,721,000
Operating income	7,145,000	9,733,000	34,945,000	18,255,000
Interest Expense	4,029,000	4,262,000	1,112,000	4,064,000
Foreign currency transaction (gain) loss	0	0	0	0
Other Nonoperating Income (Expense)	3,383,000	8,152,000	32,826,000	12,902,000
Total other expenses, net	7,412,000	12,414,000	33,938,000	16,966,000
Income (loss) from continuing operations before income taxes	(267,000)	(2,681,000)	1,007,000	1,289,000
Income tax expense (benefit)	4,960,000	96,000	(40,469,000)	286,000
Income (loss) from continuing operations	(5,227,000)	(2,777,000)	41,476,000	1,003,000
Income (loss) from discontinued operations, net of income taxes	0	0	0	3,000
Net income (loss)	(5,227,000)	(2,777,000)	41,476,000	1,006,000
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
Net income (loss) attributable to SemGroup	(5,227,000)	(2,777,000)	41,476,000	1,006,000
Other Comprehensive Income (Loss), Net of Tax	(2,162,000)	1,475,000	190,000	984,000
Comprehensive income	(7,389,000)	(1,302,000)	41,666,000	1,990,000
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0	0	0	0
Comprehensive income attributable to SemGroup	(7,389,000)	(1,302,000)	41,666,000	1,990,000
Net Cash Provided by (Used in) Operating Activities			19,717,000	(4,374,000)
Payments to Acquire Property, Plant, and Equipment			(622,000)	(1,621,000)
Proceeds from sale of long-lived assets			0	0
Proceeds from Divestiture of Businesses			189,500,000
Payments to Acquire Equity Method Investments			(18,775,000)	(1,740,000)
Payments to acquire businesses			0
Proceeds from sale of non-consolidated affiliate				0
Distributions in excess of equity in earnings of affiliates			5,541,000	5,062,000
Net cash used in investing activities			175,644,000	1,701,000
Payments of Debt Issuance Costs			(9,037,000)	(455,000)
Proceeds from Issuance of Long-term Debt and Capital Securities, Net			575,000,000	184,000,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities			(321,500,000)	(76,500,000)
Proceeds from Issuance of Common Limited Partners Units			0
Distributions to noncontrolling interests			0	0
Proceeds from warrant exercises			225,000
Payments for Repurchase of Other Equity			(371,000)	(242,000)
Payments of dividends			16,387,000
Intercompany borrowings (advances), net			(432,703,000)	(98,381,000)
Net cash provided by financing activities			(204,773,000)	8,422,000
Effect of exchange rate changes on cash and cash equivalents			0	0
Change in cash and cash equivalents			(9,412,000)	5,749,000
Change in cash and cash equivalents included in discontinued operations				0
Change in cash and cash equivalents from continuing operations				5,749,000
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	(3,128,000)	(2,674,000)	(3,128,000)	(2,674,000)	(2,938,000)	(2,762,000)
Restricted Cash and Cash Equivalents, Current	0		0		0
Accounts receivable, net	0		0		0
Receivable from affiliates	(3,146,000)		(3,146,000)		(1,980,000)
Inventories	0		0		0
Other Assets, Current	0		0		0
Total current assets	(6,274,000)		(6,274,000)		(4,918,000)
Property, plant and equipment, net	0		0		0
Equity method investments	(1,709,246,000)		(1,709,246,000)		(1,324,033,000)
Goodwill	0		0		0
Other intangible assets, net	0		0		0
Other noncurrent assets, net	0		0		0
Total assets	(1,715,520,000)		(1,715,520,000)		(1,328,951,000)
Accounts Payable, Current	0		0		0
Payable to affiliates	0		0
Accrued liabilities	(5,000)		(5,000)		0
Payables to pre-petition creditors	0		0		0
Deferred revenue	0		0		0
Other Liabilities, Current	0		0		(17,000)
Current portion of long-term debt	0		0		0
Total current liabilities	(5,000)		(5,000)		(17,000)
Long-term Debt and Capital Lease Obligations	0		0		0
Deferred Tax Liabilities, Net, Noncurrent	0		0		0
Other Liabilities, Noncurrent	0		0		0
Commitments and contingencies
Stockholders' Equity Attributable to Parent	(1,715,515,000)		(1,715,515,000)		(1,328,934,000)
Noncontrolling interests in consolidated subsidiaries	0		0		0
Total owners' equity	(1,715,515,000)		(1,715,515,000)		(1,328,934,000)
Total liabilities and owners' equity	(1,715,520,000)		(1,715,520,000)		(1,328,951,000)
Product Revenue	(6,575,000)	(2,251,000)	(15,663,000)	(7,520,000)
Sales Revenue, Services, Other	0	0	0	0
Other Revenue, Net	0	0	0	0
Total revenues	(6,575,000)	(2,251,000)	(15,663,000)	(7,520,000)
Costs of products sold, exclusive of depreciation and amortization shown below	(6,575,000)	(2,251,000)	(15,663,000)	(7,520,000)
Operating Costs and Expenses	0	0	0	0
General and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
Loss (gain) on disposal of long-lived assets, net	0	0	0	0
Total expenses	(6,575,000)	(2,251,000)	(15,663,000)	(7,520,000)
Earnings from equity method investments	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Operating income	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Interest Expense	(1,399,000)	(1,386,000)	(4,127,000)	(3,995,000)
Foreign currency transaction (gain) loss	0	0	0	0
Other Nonoperating Income (Expense)	1,399,000	1,386,000	4,127,000	3,995,000
Total other expenses, net	0	0	0	0
Income (loss) from continuing operations before income taxes	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Income tax expense (benefit)	0	0	0	0
Income (loss) from continuing operations	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Income (loss) from discontinued operations, net of income taxes	0	0	0	0
Net income (loss)	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
Net income (loss) attributable to SemGroup	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Comprehensive income	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0	0	0	0
Comprehensive income attributable to SemGroup	(43,468,000)	(42,010,000)	(107,640,000)	(78,863,000)
Net Cash Provided by (Used in) Operating Activities			(13,819,000)	(13,326,000)
Payments to Acquire Property, Plant, and Equipment			0	0
Proceeds from sale of long-lived assets			0	0
Proceeds from Divestiture of Businesses			(189,500,000)
Payments to Acquire Equity Method Investments			0	0
Payments to acquire businesses			0
Proceeds from sale of non-consolidated affiliate				0
Distributions in excess of equity in earnings of affiliates			0	0
Net cash used in investing activities			(189,500,000)	0
Payments of Debt Issuance Costs			0	0
Proceeds from Issuance of Long-term Debt and Capital Securities, Net			0	0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities			0	0
Proceeds from Issuance of Common Limited Partners Units			0
Distributions to noncontrolling interests			0	0
Proceeds from warrant exercises			0
Payments for Repurchase of Other Equity			0	0
Payments of dividends			0
Intercompany borrowings (advances), net			203,129,000	13,414,000
Net cash provided by financing activities			203,129,000	13,414,000
Effect of exchange rate changes on cash and cash equivalents			0	0
Change in cash and cash equivalents			(190,000)	88,000
Change in cash and cash equivalents included in discontinued operations				0
Change in cash and cash equivalents from continuing operations				88,000
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	58,135,000	64,275,000	58,135,000	64,275,000	63,844,000	76,264,000
Restricted Cash and Cash Equivalents, Current	1,302,000		1,302,000		1,354,000
Accounts receivable, net	356,350,000		356,350,000		337,087,000
Receivable from affiliates	244,000		244,000		109,000
Inventories	45,445,000		45,445,000		34,252,000
Other Assets, Current	12,420,000		12,420,000		15,676,000
Total current assets	473,896,000		473,896,000		452,322,000
Property, plant and equipment, net	733,790,000		733,790,000		686,426,000
Equity method investments	228,076,000		228,076,000		138,970,000
Goodwill	37,089,000		37,089,000		9,884,000
Other intangible assets, net	12,031,000		12,031,000		7,549,000
Other noncurrent assets, net	11,686,000		11,686,000		3,258,000
Total assets	1,496,568,000		1,496,568,000		1,298,409,000
Accounts Payable, Current	258,680,000		258,680,000		241,249,000
Payable to affiliates	1,967,000		1,967,000
Accrued liabilities	58,773,000		58,773,000		50,313,000
Payables to pre-petition creditors	55,000		55,000		57,000
Deferred revenue	18,835,000		18,835,000		18,973,000
Other Liabilities, Current	8,309,000		8,309,000		4,263,000
Current portion of long-term debt	26,000		26,000		24,000
Total current liabilities	346,645,000		346,645,000		314,879,000
Long-term Debt and Capital Lease Obligations	85,043,000		85,043,000		4,562,000
Deferred Tax Liabilities, Net, Noncurrent	52,612,000		52,612,000		63,602,000
Other Liabilities, Noncurrent	49,060,000		49,060,000		47,759,000
Commitments and contingencies
Stockholders' Equity Attributable to Parent	710,848,000		710,848,000		738,473,000
Noncontrolling interests in consolidated subsidiaries	252,360,000		252,360,000		129,134,000
Total owners' equity	963,208,000		963,208,000		867,607,000
Total liabilities and owners' equity	1,496,568,000		1,496,568,000		1,298,409,000
Product Revenue	231,404,000	182,672,000	634,117,000	629,770,000
Sales Revenue, Services, Other	35,228,000	29,518,000	94,091,000	85,776,000
Other Revenue, Net	32,894,000	38,788,000	108,617,000	126,456,000
Total revenues	299,526,000	250,978,000	836,825,000	842,002,000
Costs of products sold, exclusive of depreciation and amortization shown below	214,472,000	168,598,000	587,481,000	589,929,000
Operating Costs and Expenses	47,291,000	49,312,000	149,772,000	163,495,000
General and administrative	10,855,000	10,047,000	32,557,000	30,436,000
Depreciation and amortization	10,778,000	9,804,000	31,161,000	29,042,000
Loss (gain) on disposal of long-lived assets, net	(271,000)	(3,612,000)	(812,000)	(3,493,000)
Total expenses	283,125,000	234,149,000	800,159,000	809,409,000
Earnings from equity method investments	10,787,000	10,021,000	31,886,000	25,053,000
Operating income	27,188,000	26,850,000	68,552,000	57,646,000
Interest Expense	5,136,000	1,346,000	15,845,000	8,609,000
Foreign currency transaction (gain) loss	(457,000)	355,000	(973,000)	358,000
Other Nonoperating Income (Expense)	(112,000)	(134,000)	(341,000)	(95,000)
Total other expenses, net	4,567,000	1,567,000	14,531,000	8,872,000
Income (loss) from continuing operations before income taxes	22,621,000	25,283,000	54,021,000	48,774,000
Income tax expense (benefit)	(1,547,000)	1,995,000	(836,000)	699,000
Income (loss) from continuing operations	24,168,000	23,288,000	54,857,000	48,075,000
Income (loss) from discontinued operations, net of income taxes	(2,000)	(261,000)	(1,000)	(448,000)
Net income (loss)	24,166,000	23,027,000	54,856,000	47,627,000
Net Income (Loss) Attributable to Noncontrolling Interest	5,054,000	2,336,000	14,429,000	7,915,000
Net income (loss) attributable to SemGroup	19,112,000	20,691,000	40,427,000	39,712,000
Other Comprehensive Income (Loss), Net of Tax	8,267,000	10,597,000	(4,497,000)	13,946,000
Comprehensive income	32,433,000	33,624,000	50,359,000	61,573,000
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	5,054,000	2,336,000	14,429,000	7,915,000
Comprehensive income attributable to SemGroup	27,379,000	31,288,000	35,930,000	53,658,000
Net Cash Provided by (Used in) Operating Activities			74,197,000	58,353,000
Payments to Acquire Property, Plant, and Equipment			(65,183,000)	(38,796,000)
Proceeds from sale of long-lived assets			1,045,000	335,000
Proceeds from Divestiture of Businesses			0
Payments to Acquire Equity Method Investments			(96,657,000)	205,000
Payments to acquire businesses			(49,969,000)
Proceeds from sale of non-consolidated affiliate				3,500,000
Distributions in excess of equity in earnings of affiliates			7,550,000	5,507,000
Net cash used in investing activities			(203,214,000)	(29,249,000)
Payments of Debt Issuance Costs			(2,828,000)	(239,000)
Proceeds from Issuance of Long-term Debt and Capital Securities, Net			353,474,000	76,500,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities			(272,903,000)	(102,501,000)
Proceeds from Issuance of Common Limited Partners Units			210,226,000
Distributions to noncontrolling interests			(11,458,000)	(5,754,000)
Proceeds from warrant exercises			0
Payments for Repurchase of Other Equity			0	0
Payments of dividends			0
Intercompany borrowings (advances), net			(154,107,000)	(8,086,000)
Net cash provided by financing activities			122,404,000	(40,080,000)
Effect of exchange rate changes on cash and cash equivalents			904,000	(977,000)
Change in cash and cash equivalents			(5,709,000)	(11,953,000)
Change in cash and cash equivalents included in discontinued operations				(36,000)
Change in cash and cash equivalents from continuing operations				(11,989,000)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	0	0	0	0	0	0
Restricted Cash and Cash Equivalents, Current	0		0		0
Accounts receivable, net	11,256,000		11,256,000		7,927,000
Receivable from affiliates	15,189,000		15,189,000		7,222,000
Inventories	1,164,000		1,164,000		181,000
Other Assets, Current	330,000		330,000		312,000
Total current assets	27,939,000		27,939,000		15,642,000
Property, plant and equipment, net	318,805,000		318,805,000		122,899,000
Equity method investments	524,300,000		524,300,000		468,033,000
Goodwill	23,587,000		23,587,000		0
Other intangible assets, net	167,834,000		167,834,000		0
Other noncurrent assets, net	1,172,000		1,172,000		1,317,000
Total assets	1,063,637,000		1,063,637,000		607,891,000
Accounts Payable, Current	44,888,000		44,888,000		12,304,000
Payable to affiliates	121,000		121,000
Accrued liabilities	8,026,000		8,026,000		4,546,000
Payables to pre-petition creditors	0		0		0
Deferred revenue	0		0		0
Other Liabilities, Current	714,000		714,000		580,000
Current portion of long-term debt	0		0		0
Total current liabilities	53,749,000		53,749,000		17,430,000
Long-term Debt and Capital Lease Obligations	0		0		0
Deferred Tax Liabilities, Net, Noncurrent	0		0		0
Other Liabilities, Noncurrent	0		0		0
Commitments and contingencies
Stockholders' Equity Attributable to Parent	1,009,888,000		1,009,888,000		590,461,000
Noncontrolling interests in consolidated subsidiaries	0		0		0
Total owners' equity	1,009,888,000		1,009,888,000		590,461,000
Total liabilities and owners' equity	1,063,637,000		1,063,637,000		607,891,000
Product Revenue	63,623,000	28,781,000	146,880,000	86,158,000
Sales Revenue, Services, Other	1,174,000	282,000	1,646,000	951,000
Other Revenue, Net	0	62,000	0	69,000
Total revenues	64,797,000	29,125,000	148,526,000	87,178,000
Costs of products sold, exclusive of depreciation and amortization shown below	47,657,000	23,483,000	108,814,000	68,874,000
Operating Costs and Expenses	5,069,000	3,055,000	13,041,000	9,255,000
General and administrative	2,242,000	2,793,000	6,347,000	6,109,000
Depreciation and amortization	4,838,000	1,649,000	8,898,000	4,707,000
Loss (gain) on disposal of long-lived assets, net	679,000	(3,000)	682,000	(3,000)
Total expenses	60,485,000	30,977,000	137,782,000	88,942,000
Earnings from equity method investments	24,667,000	20,904,000	63,011,000	39,992,000
Operating income	28,979,000	19,052,000	73,755,000	38,228,000
Interest Expense	1,314,000	(2,230,000)	3,141,000	(915,000)
Foreign currency transaction (gain) loss	0	0	0	0
Other Nonoperating Income (Expense)	1,000	(50,000)	159,000	(19,000)
Total other expenses, net	1,315,000	(2,280,000)	3,300,000	(934,000)
Income (loss) from continuing operations before income taxes	27,664,000	21,332,000	70,455,000	39,162,000
Income tax expense (benefit)	0	0	0	0
Income (loss) from continuing operations	27,664,000	21,332,000	70,455,000	39,162,000
Income (loss) from discontinued operations, net of income taxes	0	(4,000)	66,000	(11,000)
Net income (loss)	27,664,000	21,328,000	70,521,000	39,151,000
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
Net income (loss) attributable to SemGroup	27,664,000	21,328,000	70,521,000	39,151,000
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Comprehensive income	27,664,000	21,328,000	70,521,000	39,151,000
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0	0	0	0
Comprehensive income attributable to SemGroup	27,664,000	21,328,000	70,521,000	39,151,000
Net Cash Provided by (Used in) Operating Activities			16,424,000	11,105,000
Payments to Acquire Property, Plant, and Equipment			(65,845,000)	(41,706,000)
Proceeds from sale of long-lived assets			3,000	12,000
Proceeds from Divestiture of Businesses			0
Payments to Acquire Equity Method Investments			(28,031,000)	(62,464,000)
Payments to acquire businesses			(306,232,000)
Proceeds from sale of non-consolidated affiliate				0
Distributions in excess of equity in earnings of affiliates			0	0
Net cash used in investing activities			(400,105,000)	(104,158,000)
Payments of Debt Issuance Costs			0	0
Proceeds from Issuance of Long-term Debt and Capital Securities, Net			0	0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities			0	0
Proceeds from Issuance of Common Limited Partners Units			0
Distributions to noncontrolling interests			0	0
Proceeds from warrant exercises			0
Payments for Repurchase of Other Equity			0	0
Payments of dividends			0
Intercompany borrowings (advances), net			383,681,000	93,053,000
Net cash provided by financing activities			383,681,000	93,053,000
Effect of exchange rate changes on cash and cash equivalents			0	0
Change in cash and cash equivalents			0	0
Change in cash and cash equivalents included in discontinued operations				0
Change in cash and cash equivalents from continuing operations				$ 0

XML

Financial Instruments Fair Value Disclosures (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Financial Instruments [Abstract]
Level 2 and level 3 fair value transactions	$ 0
Derivative Asset, Fair Value, Net	600,000	800,000
Margin Deposit Assets	$ (100,000)	$ 1,900,000

XML

Equity (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended							9 Months Ended				9 Months Ended
	May 30, 2013	Nov. 19, 2013	Sep. 30, 2013	Sep. 30, 2013 Employee Stock Purchase Plan[Member]	Sep. 30, 2013 Warrants Issued On Emergence Date [Member]	Sep. 30, 2013 Warrants Subsequently Issued In Settlement Of Pre-Petition Claims [Member]	Sep. 30, 2013 Class A [Member]	Sep. 30, 2013 Class B [Member]	Sep. 30, 2013 Shares Issued On Emergence Date [Member]	Sep. 30, 2013 Shares Subsequently Issued In Settlement Of Pre-Petition Claims [Member]	Sep. 30, 2013 Issuance of Shares Under Employee and Director Compensation Programs [Member]		Sep. 30, 2013 Warrant [Member]	Sep. 30, 2013 Semcrude Pipeline [Member]	Sep. 30, 2013 2013 Q2 [Member]	Sep. 30, 2013 2013 Q3 [Member] [Member]	Sep. 30, 2013 2013 Q4 [Member]
Equity [Line Items]
Common Stock, Dividends, Per Share, Declared																	$ 0.21
Dividends Payable, Date to be Paid																	Dec. 03, 2013
EQUITY (Textual) [Abstract]
Equity Method Investment, Ownership Percentage														33.00%
Income tax expense, related to change in benefit plans			$ 46
Common stock shares issued			42,530,641						40,882,496	226,016	689,320	[1]
Shares To Be Issued To Settle Prepetition Claims										517,500
Vested common stock											105,738
Shares of vested stock awards sold back to satisfy tax obligations			8,591
Par value per share			$ 0.01				$ 0.01	$ 0.01
Common stock shares authorized							90,000,000	10,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			201,451
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Potentialy Vest			141,000
Deferred Compensation Liability, Classified, Noncurrent			$ 78
Number of Class A shares equal to unvested dividend rights			1,366
Share Price			$ 57.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number			534,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 52.78
Warrants issued			1,360,823		1,634,210	237,897
Class of Warrant or Right, To Be Issued						544,737
Warrants exercised during period			772,817
Stock Issued During Period, Shares, Conversion of Convertible Securities													425,618
Price of purchase of one share of common stock against warrant			25
Limitation on ESPP shares per employee per offering period				12,500
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date				85.00%
Common Stock, Capital Shares Reserved for Future Issuance				1,000,000
Common Stock, Dividends, Per Share, Cash Paid	$ 0.19	$ 0.20
Dividends Payable, Date of Record															May 20, 2013	Aug. 19, 2013	Nov. 22, 2013
Dividends Payable, Date Declared																	Nov. 06, 2013

[1] (*) These shares include 105,738 shares which vested during the nine months ended September 30, 2013. Of these vested shares, recipients sold back to the Company 8,591 shares to satisfy tax withholding obligations which are being recognized at cost as treasury stock on the condensed consolidated balance sheet.

XML

Rose Rock Midstream, L.P. (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Summarized Income Statement Information
Revenue	$ 357,748	$ 277,852	$ 969,688	$ 921,660
Cost of products sold	255,554	189,830	680,632	651,283
Depreciation and amortization	16,113	12,081	41,563	35,687
Earnings from equity method investments	7,483	3,116	39,689	22,903
Net income	3,135	(432)	59,213	8,921
Rose Rock Midstream, L.P. [Member]
Summarized Income Statement Information
Revenue	181,831	131,554	514,485	468,687
Cost of products sold	157,550	111,790	446,507	412,847
Operating, general and administrative expenses	12,394	9,779	30,434	25,976
Depreciation and amortization	4,130	3,066	11,327	9,032
Earnings from equity method investments	3,527	0	10,431	0
Net income	$ 9,411	$ 6,469	$ 30,539	$ 19,353

XML

Condensed Consolidating Guarantor Financial Statements (Tables)

9 Months Ended

Sep. 30, 2013

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Schedule of Condensed Balance Sheet [Table Text Block]

Condensed Consolidating Guarantor Balance Sheets

	September 30, 2013
	Parent		Guarantors		Non-guarantors		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	9,711	$	—	$	58,135	$	(3,128	)	$	64,718
Restricted cash	32,880		—		1,302		—			34,182
Accounts receivable	640		11,256		356,350		—			368,246
Receivable from affiliates	752		15,189		244		(3,146		)	13,039
Inventories	—		1,164		45,445		—			46,609
Other current assets	2,417		330		12,420		—			15,167
Total current assets	46,400		27,939		473,896		(6,274		)	541,961
Property, plant and equipment	4,521		318,805		733,790		—			1,057,116
Equity method investments	1,475,019		524,300		228,076		(1,709,246		)	518,149
Goodwill	—		23,587		37,089		—			60,676
Other intangible assets	32		167,834		12,031		—			179,897
Other noncurrent assets, net	19,745		1,172		11,686		—			32,603
Total assets	$	1,545,717	$	1,063,637	$	1,496,568	$	(1,715,520	)	$	2,390,402
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	104	$	44,888	$	258,680	$	—		$	303,672
Payable to affiliates	14		121		1,967		—			2,102
Accrued liabilities	14,715		8,026		58,773		(5		)	81,509
Payables to pre-petition creditors	32,317		—		55		—			32,372
Deferred revenue	—		—		18,835		—			18,835
Other current liabilities	97		714		8,309		—			9,120
Current portion of long-term debt	—		—		26		—			26
Total current liabilities	47,247		53,749		346,645		(5		)	447,636
Long-term debt	455,000		—		85,043		—			540,043
Deferred income taxes	976		—		52,612		—			53,588
Other noncurrent liabilities	46,358		—		49,060		—			95,418
Commitments and contingencies
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	996,136		1,009,888		710,848		(1,715,515		)	1,001,357
Noncontrolling interests in consolidated subsidiaries	—		—		252,360		—			252,360
Total owners’ equity	996,136		1,009,888		963,208		(1,715,515		)	1,253,717
Total liabilities and owners’ equity	$	1,545,717	$	1,063,637	$	1,496,568	$	(1,715,520	)	$	2,390,402

	December 31, 2012
	Parent		Guarantors		Non-guarantors		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	19,123	$	—	$	63,844	$	(2,938	)	$	80,029
Restricted cash	33,324		—		1,354		—			34,678
Accounts receivable	1,155		7,927		337,087		—			346,169
Receivable from affiliates	827		7,222		109		(1,980		)	6,178
Inventories	—		181		34,252		—			34,433
Other current assets	2,528		312		15,676		—			18,516
Total current assets	56,957		15,642		452,322		(4,918		)	520,003
Property, plant and equipment	5,399		122,899		686,426		—			814,724
Equity method investments	1,104,832		468,033		138,970		(1,324,033		)	387,802
Goodwill	—		—		9,884		—			9,884
Other intangible assets	36		—		7,549		—			7,585
Other noncurrent assets, net	3,606		1,317		3,258		—			8,181
Total assets	$	1,170,830	$	607,891	$	1,298,409	$	(1,328,951	)	$	1,748,179
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	70	$	12,304	$	241,249	$	—		$	253,623
Accrued liabilities	8,972		4,546		50,313		—			63,831
Payables to pre-petition creditors	32,876		—		57		—			32,933
Deferred revenue	—		—		18,973		—			18,973
Other current liabilities	134		580		4,263		(17		)	4,960
Current portion of long-term debt	—		—		24		—			24
Total current liabilities	42,052		17,430		314,879		(17		)	374,344
Long-term debt	201,500		—		4,562		—			206,062
Deferred income taxes	2,018		—		63,602		—			65,620
Other noncurrent liabilities	32,866		—		47,759		—			80,625
Commitments and contingencies
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	892,394		590,461		738,473		(1,328,934		)	892,394
Noncontrolling interests in consolidated subsidiaries	—		—		129,134		—			129,134
Total owners’ equity	892,394		590,461		867,607		(1,328,934		)	1,021,528
Total liabilities and owners’ equity	$	1,170,830	$	607,891	$	1,298,409	$	(1,328,951	)	$	1,748,179

Schedule of Condensed Income Statement [Table Text Block]

Condensed Consolidating Guarantor Statements of Operations

	Three Months Ended September 30, 2013
	Parent			Guarantors		Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	63,623	$	231,404		$	(6,575	)	$	288,452
Service	—			1,174		35,228			—			36,402
Other	—			—		32,894			—			32,894
Total revenues	—			64,797		299,526			(6,575		)	357,748
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			47,657		214,472			(6,575		)	255,554
Operating	—			5,069		47,291			—			52,360
General and administrative	7,855			2,242		10,855			—			20,952
Depreciation and amortization	497			4,838		10,778			—			16,113
Loss (gain) on disposal of long-lived assets, net	—			679		(271		)	—			408
Total expenses	8,352			60,485		283,125			(6,575		)	345,387
Earnings from equity method investments	15,497			24,667		10,787			(43,468		)	7,483
Operating income	7,145			28,979		27,188			(43,468		)	19,844
Other expenses (income):
Interest expense	4,029			1,314		5,136			(1,399		)	9,080
Foreign currency transaction gain	—			—		(457		)	—			(457		)
Other expense, net	3,383			1		(112		)	1,399			4,671
Total other expenses, net	7,412			1,315		4,567			—			13,294
Income (loss) from continuing operations before income taxes	(267		)	27,664		22,621			(43,468		)	6,550
Income tax expense (benefit)	4,960			—		(1,547		)	—			3,413
Income (loss) from continuing operations	(5,227		)	27,664		24,168			(43,468		)	3,137
Loss from discontinued operations, net of income taxes	—			—		(2		)	—			(2		)
Net income (loss)	(5,227		)	27,664		24,166			(43,468		)	3,135
Less: net income attributable to noncontrolling interests	—			—		5,054			—			5,054
Net income (loss) attributable to SemGroup	$	(5,227	)	$	27,664	$	19,112		$	(43,468	)	$	(1,919	)
Net income (loss)	$	(5,227	)	$	27,664	$	24,166		$	(43,468	)	$	3,135
Other comprehensive income (loss), net of income taxes	(2,162		)	—		8,267			—			6,105
Comprehensive income (loss)	(7,389		)	27,664		32,433			(43,468		)	9,240
Less: comprehensive income attributable to noncontrolling interests	—			—		5,054			—			5,054
Comprehensive income (loss) attributable to SemGroup	$	(7,389	)	$	27,664	$	27,379		$	(43,468	)	$	4,186

	Three Months Ended September 30, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	28,781		$	182,672		$	(2,251	)	$	209,202
Service	—			282			29,518			—			29,800
Other	—			62			38,788			—			38,850
Total revenues	—			29,125			250,978			(2,251		)	277,852
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			23,483			168,598			(2,251		)	189,830
Operating	—			3,055			49,312			—			52,367
General and administrative	3,840			2,793			10,047			—			16,680
Depreciation and amortization	628			1,649			9,804			—			12,081
Gain on disposal of long-lived assets, net	—			(3		)	(3,612		)	—			(3,615		)
Total expenses	4,468			30,977			234,149			(2,251		)	267,343
Earnings from equity method investments	14,201			20,904			10,021			(42,010		)	3,116
Operating income	9,733			19,052			26,850			(42,010		)	13,625
Other expenses (income):
Interest expense	4,262			(2,230		)	1,346			(1,386		)	1,992
Foreign currency transaction loss	—			—			355			—			355
Other expense (income), net	8,152			(50		)	(134		)	1,386			9,354
Total other expenses, net	12,414			(2,280		)	1,567			—			11,701
Income (loss) from continuing operations before income taxes	(2,681		)	21,332			25,283			(42,010		)	1,924
Income tax expense	96			—			1,995			—			2,091
Income (loss) from continuing operations	(2,777		)	21,332			23,288			(42,010		)	(167		)
Loss from discontinued operations, net of income taxes	—			(4		)	(261		)	—			(265		)
Net income (loss)	(2,777		)	21,328			23,027			(42,010		)	(432		)
Less: net income attributable to noncontrolling interests	—			—			2,336			—			2,336
Net income (loss) attributable to SemGroup	$	(2,777	)	$	21,328		$	20,691		$	(42,010	)	$	(2,768	)
Net income (loss)	$	(2,777	)	$	21,328		$	23,027		$	(42,010	)	$	(432	)
Other comprehensive loss, net of income taxes	1,475			—			10,597			—			12,072
Comprehensive income (loss)	(1,302		)	21,328			33,624			(42,010		)	11,640
Less: comprehensive income attributable to noncontrolling interests	—			—			2,336			—			2,336
Comprehensive income (loss) attributable to SemGroup	$	(1,302	)	$	21,328		$	31,288		$	(42,010	)	$	9,304

	Nine Months Ended September 30, 2013
	Parent			Guarantors		Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	146,880	$	634,117		$	(15,663	)	$	765,334
Service	—			1,646		94,091			—			95,737
Other	—			—		108,617			—			108,617
Total revenues	—			148,526		836,825			(15,663		)	969,688
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			108,814		587,481			(15,663		)	680,632
Operating	—			13,041		149,772			—			162,813
General and administrative	15,983			6,347		32,557			—			54,887
Depreciation and amortization	1,504			8,898		31,161			—			41,563
Loss (gain) on disposal of long-lived assets, net	—			682		(812		)	—			(130		)
Total expenses	17,487			137,782		800,159			(15,663		)	939,765
Earnings from equity method investments	52,432			63,011		31,886			(107,640		)	39,689
Operating income	34,945			73,755		68,552			(107,640		)	69,612
Other expenses (income):
Interest expense	1,112			3,141		15,845			(4,127		)	15,971
Foreign currency transaction gain	—			—		(973		)	—			(973		)
Other expense (income), net	32,826			159		(341		)	4,127			36,771
Total other expenses, net	33,938			3,300		14,531			—			51,769
Income from continuing operations before income taxes	1,007			70,455		54,021			(107,640		)	17,843
Income tax benefit	(40,469		)	—		(836		)	—			(41,305		)
Income from continuing operations	41,476			70,455		54,857			(107,640		)	59,148
Income (loss) from discontinued operations, net of income taxes	—			66		(1		)	—			65
Net income	41,476			70,521		54,856			(107,640		)	59,213
Less: net income attributable to noncontrolling interests	—			—		14,429			—			14,429
Net income attributable to SemGroup	$	41,476		$	70,521	$	40,427		$	(107,640	)	$	44,784
Net income	$	41,476		$	70,521	$	54,856		$	(107,640	)	$	59,213
Other comprehensive income (loss), net of income taxes	190			—		(4,497		)	—			(4,307		)
Comprehensive income	41,666			70,521		50,359			(107,640		)	54,906
Less: comprehensive income attributable to noncontrolling interests	—			—		14,429			—			14,429
Comprehensive income attributable to SemGroup	$	41,666		$	70,521	$	35,930		$	(107,640	)	$	40,477

	Nine Months Ended September 30, 2012
	Parent		Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—	$	86,158		$	629,770		$	(7,520	)	$	708,408
Service	—		951			85,776			—			86,727
Other	—		69			126,456			—			126,525
Total revenues	—		87,178			842,002			(7,520		)	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—		68,874			589,929			(7,520		)	651,283
Operating	—		9,255			163,495			—			172,750
General and administrative	16,528		6,109			30,436			—			53,073
Depreciation and amortization	1,938		4,707			29,042			—			35,687
Gain on disposal of long-lived assets, net	—		(3		)	(3,493		)	—			(3,496		)
Total expenses	18,466		88,942			809,409			(7,520		)	909,297
Earnings from equity method investments	36,721		39,992			25,053			(78,863		)	22,903
Operating income	18,255		38,228			57,646			(78,863		)	35,266
Other expenses (income):
Interest expense	4,064		(915		)	8,609			(3,995		)	7,763
Foreign currency transaction loss	—		—			358			—			358
Other expense (income), net	12,902		(19		)	(95		)	3,995			16,783
Total other expenses (income), net	16,966		(934		)	8,872			—			24,904
Income from continuing operations before income taxes	1,289		39,162			48,774			(78,863		)	10,362
Income tax expense	286		—			699			—			985
Income from continuing operations	1,003		39,162			48,075			(78,863		)	9,377
Income (loss) from discontinued operations, net of income taxes	3		(11		)	(448		)	—			(456		)
Net income	1,006		39,151			47,627			(78,863		)	8,921
Less: net income attributable to noncontrolling interests	—		—			7,915			—			7,915
Net income attributable to SemGroup	$	1,006	$	39,151		$	39,712		$	(78,863	)	$	1,006
Net income	$	1,006	$	39,151		$	47,627		$	(78,863	)	$	8,921
Other comprehensive income, net of income taxes	984		—			13,946			—			14,930
Comprehensive income	1,990		39,151			61,573			(78,863		)	23,851
Less: comprehensive income attributable to noncontrolling interests	—		—			7,915			—			7,915
Comprehensive income attributable to SemGroup	$	1,990	$	39,151		$	53,658		$	(78,863	)	$	15,936

Schedule of Condensed Cash Flow Statement [Table Text Block]

Condensed Consolidating Guarantor Statements of Cash Flows

	Nine Months Ended September 30, 2013
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by operating activities	$	19,717		$	16,424		$	74,197		$	(13,819	)	$	96,519
Cash flows from investing activities:
Capital expenditures	(622		)	(65,845		)	(65,183		)	—			(131,650		)
Proceeds from sale of long-lived assets	—			3			1,045			—			1,048
Proceeds from the sale of interest in SemCrude Pipeline, L.L.C. to Rose Rock Midstream L.P.	189,500			—			—			(189,500		)	—
Investments in non-consolidated subsidiaries	(18,775		)	(28,031		)	(96,657		)	—			(143,463		)
Payments to acquire businesses	—			(306,232		)	(49,969		)	—			(356,201		)
Distributions in excess of equity in earnings of affiliates	5,541			—			7,550			—			13,091
Net cash provided by (used in) investing activities	175,644			(400,105		)	(203,214		)	(189,500		)	(617,175		)
Cash flows from financing activities:
Debt issuance costs	(9,037		)	—			(2,828		)	—			(11,865		)
Borrowings on credit facilities	575,000			—			353,474			—			928,474
Principal payments on credit facilities and other obligations	(321,500		)	—			(272,903		)	—			(594,403		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			210,226			—			210,226
Distributions to noncontrolling interests	—			—			(11,458		)	—			(11,458		)
Proceeds from warrant exercises	225			—			—			—			225
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(371		)	—			—			—			(371		)
Dividends paid	(16,387		)	—			—			—			(16,387		)
Intercompany borrowings (advances), net	(432,703		)	383,681			(154,107		)	203,129			—
Net cash provided by (used in) financing activities	(204,773		)	383,681			122,404			203,129			504,441
Effect of exchange rate changes on cash and cash equivalents	—			—			904			—			904
Change in cash and cash equivalents	(9,412		)	—			(5,709		)	(190		)	(15,311		)
Cash and cash equivalents at beginning of period	19,123			—			63,844			(2,938		)	80,029
Cash and cash equivalents at end of period	$	9,711		$	—		$	58,135		$	(3,128	)	$	64,718

	Nine Months Ended September 30, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by (used in) operating activities	$	(4,374	)	$	11,105		$	58,353		$	(13,326	)	$	51,758
Cash flows from investing activities:
Capital expenditures	(1,621		)	(41,706		)	(38,796		)	—			(82,123		)
Proceeds from sale of long-lived assets	—			12			335			—			347
Investments in non-consolidated subsidiaries	(1,740		)	(62,464		)	205			—			(63,999		)
Proceeds from the sale of non-consolidated affiliate	—			—			3,500			—			3,500
Distributions in excess of equity in earnings of affiliates	5,062			—			5,507			—			10,569
Net cash provided by (used in) investing activities	1,701			(104,158		)	(29,249		)	—			(131,706		)
Cash flows from financing activities:
Debt issuance costs	(455		)	—			(239		)	—			(694		)
Borrowings on credit facilities	184,000			—			76,500			—			260,500
Principal payments on credit facilities and other obligations	(76,500		)	—			(102,501		)	—			(179,001		)
Distributions to noncontrolling interests	—			—			(5,754		)	—			(5,754		)
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(242		)	—			—			—			(242		)
Intercompany borrowing (advances), net	(98,381		)	93,053			(8,086		)	13,414			—
Net cash provided by (used in) financing activities	8,422			93,053			(40,080		)	13,414			74,809
Effect of exchange rate changes on cash and cash equivalents	—			—			(977		)	—			(977		)
Change in cash and cash equivalents	5,749			—			(11,953		)	88			(6,116		)
Change in cash and cash equivalents included in discontinued operations	—			—			(36		)	—			(36		)
Change in cash and cash equivalents from continuing operations	5,749			—			(11,989		)	88			(6,152		)
Cash and cash equivalents at beginning of period	111			—			76,264			(2,762		)	73,613
Cash and cash equivalents at end of period	$	5,860		$	—		$	64,275		$	(2,674	)	$	67,461

XML

Rose Rock Midstream, L.P. (Details 1)	3 Months Ended
	Sep. 30, 2013
Minimum Quarterly Distributions [Member]
Quarterly Target Distributions
Marginal Percentage Interest, Unitholders	98.00%
Marginal Percentage Interest, General Partner	2.00%
Marginal Percentage Interest, Incentive Distribution Rights	0.00%
Minimum Quarterly Distributions [Member] | Minimum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.3625
First Target Distribution [Member]
Quarterly Target Distributions
Marginal Percentage Interest, Unitholders	98.00%
Marginal Percentage Interest, General Partner	2.00%
Marginal Percentage Interest, Incentive Distribution Rights	0.00%
First Target Distribution [Member] | Minimum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.3625
First Target Distribution [Member] | Maximum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.416875
Second Target Distribution [Member]
Quarterly Target Distributions
Marginal Percentage Interest, Unitholders	85.00%
Marginal Percentage Interest, General Partner	2.00%
Marginal Percentage Interest, Incentive Distribution Rights	13.00%
Second Target Distribution [Member] | Minimum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.416875
Second Target Distribution [Member] | Maximum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.453125
Third Target Distribution [Member]
Quarterly Target Distributions
Marginal Percentage Interest, Unitholders	75.00%
Marginal Percentage Interest, General Partner	2.00%
Marginal Percentage Interest, Incentive Distribution Rights	23.00%
Third Target Distribution [Member] | Minimum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.453125
Third Target Distribution [Member] | Maximum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.54375
Thereafter [Member]
Quarterly Target Distributions
Marginal Percentage Interest, Unitholders	50.00%
Marginal Percentage Interest, General Partner	2.00%
Marginal Percentage Interest, Incentive Distribution Rights	48.00%
Thereafter [Member] | Minimum [Member]
Quarterly Target Distributions
Quarterly Distributions, Per Unit Target Amounts	0.54375

XML

Long-Term Debt

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Long-Term Debt

LONG-TERM DEBT

Our long-term debt consisted of the following (in thousands):

	September 30, 2013		December 31, 2012
SemGroup 7.50% senior unsecured notes	$	300,000	$	—
SemGroup corporate revolving credit facility	155,000		201,500
Rose Rock credit facility	85,000		4,500
SemMexico credit facility	—		—
Capital leases	69		86
Total long-term debt	$	540,069	$	206,086
less: current portion of long-term debt	26		24
Noncurrent portion of long-term debt	$	540,043	$	206,062

SemGroup senior unsecured notes

On June 14, 2013, we completed an offering of $300 million of 7.50% senior unsecured notes due 2021 (the “Notes”) to certain initial purchasers for resale to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and to non-U.S. persons outside the United States pursuant to Regulation S of the Securities Act. The Notes are guaranteed by certain of our subsidiaries: SemGas, L.P., SemCanada, L.P., SemCanada II, L.P., SemMaterials, L.P., SemStream, 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, Wattenberg Holding, LLC, Glass Mountain Holding, LLC and Mid-America Midstream Gas Services, L.L.C. (collectively, the "Guarantors").

The net proceeds from the offering were $294.0 million, after deducting the initial purchasers' discount. We used the net proceeds from the offering to (i) fund a portion of our acquisition on August 1, 2013, of all the outstanding equity interests in Mid-America Midstream Gas Services, L.L.C., a subsidiary of Chesapeake Energy Corporation, and (ii) during the second quarter of 2013, repay amounts borrowed under our revolving credit facility.

The Notes are governed by an indenture, as supplemented, between the Company and its subsidiary Guarantors and Wilmington Trust, N.A., as trustee (the “Indenture”). The Indenture includes customary covenants, including limitations on our ability to incur additional indebtedness or issue certain preferred shares; pay dividends and make certain distributions, investments and other restricted payments; create certain liens; sell assets; enter into transactions with affiliates; enter into sale and lease-back transactions; merge, consolidate, sell or otherwise dispose of all or substantially all of our assets; and designate our subsidiaries as unrestricted under the Indenture.

The Indenture includes customary events of default, including events of default relating to non-payment of principal and other amounts owing from time to time, failure to provide required reports, failure to comply with agreements in the indenture, cross payment-defaults to any material indebtedness, bankruptcy and insolvency events, certain unsatisfied judgments, and invalidation or cessation of the subsidiary guarantee of a significant subsidiary. A default would permit holders to declare the Notes and accrued interest due and payable.

The Notes are effectively subordinated in right of payment to any of our, and the Guarantors', existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness and are structurally subordinated to the obligations of any subsidiary that is not a guarantor of the Notes.

The Company may issue additional Notes under the Indenture from time to time, subject to the terms of the Indenture.

Except as described below, the Notes are not redeemable at the Company's option prior to June 15, 2016. From and after June 15, 2016, the Company may redeem the Notes, in whole or in part, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest, if redeemed during the twelve-month period beginning on June 15 of each of the years indicated below:

Year	Percentage
2016	105.625%
2017	103.750%
2018	101.875%
2019 and thereafter	100.000%

Prior to June 15, 2016, the Company may, at its option, on one or more occasions, redeem up to 35% of the sum of the original aggregate principal amount of the Notes at a redemption price equal to 107.500% of the aggregate principal amount thereof, plus accrued and unpaid interest, with the net cash proceeds of one or more equity offerings of the Company, subject to certain conditions.

Prior to June 15, 2016, the Company may also redeem all or part of the Notes at a price equal to the principal plus a premium equal to the greater of 1% of the principal or the excess of the present value of the June 15, 2016 redemption price from the table above plus all required interest payments due through June 15, 2016, computed using a discount rate based on a published United States Treasury Rate plus 50 basis points, over the principal value of such Note.

In the event of a change of control, the Company is required to offer to repurchase the Notes at an amount equal to 101% of the principal plus accrued and unpaid interest.

The Notes are also subject to a Registration Rights Agreement which requires the Company to file a registration statement with the SEC and to use commercially reasonable efforts to cause the registration statement to be declared effective by the SEC so that holders of the Notes can exchange the Notes and related guarantees for registered notes (the "Exchange Notes") and guarantees that have substantially identical terms as the Notes and related guarantees. The guarantees of the Exchange Notes will be full and unconditional and will constitute the joint and several obligations of the Guarantors. Failure to meet the terms of the Registration Rights Agreement will require the Company to pay incremental interest of 0.25% per annum, increased by an additional 0.25% per annum for each 90-day period for which registration default continues (up to a maximum of 1.0% per annum).

Interest on the Notes is payable in arrears on June 15th and December 15th to holders of record on June 1st and December 1st each year until maturity. For the three and nine months ended September 30, 2013, we incurred $6.0 million and $7.1 million of interest expense related to the Notes, respectively, including the amortization of debt issuance costs. At September 30, 2013, we had $6.4 million of unamortized debt issuance costs related to the Notes included in other noncurrent assets on our condensed consolidated balance sheet.

At September 30, 2013, we were in compliance with the terms of the Notes.

SemGroup corporate credit agreement

Our revolving credit facility had a capacity of $500 million at September 30, 2013. This capacity may be used either for cash borrowings or letters of credit, although the maximum letter of credit capacity is $250 million. At September 30, 2013, we had $155 million outstanding cash borrowings on this facility and outstanding letters of credit of $4.5 million.

The interest rate in effect at September 30, 2013, on $155 million of alternate base rate ("ABR") borrowings was 5.5%. At September 30, 2013, the rate in effect on letters of credit was 3.25%. In addition, a fronting fee of 0.25% is charged on outstanding letters of credit. A commitment fee of 0.5% is charged on any unused capacity on the revolving credit facility.

At September 30, 2013, $4.8 million in capitalized loan fees, net of accumulated amortization, was recorded in other noncurrent assets, which is being amortized over the life of the facility.

We recorded interest expense related to the SemGroup revolving credit facility of $2.3 million and $1.7 million for the three months ended September 30, 2013 and 2012, respectively, including amortization of debt issuance costs. We recorded interest expense related to the SemGroup revolving credit facility of $5.0 million and $4.9 million for the nine months endedSeptember 30, 2013 and 2012, respectively, including amortization of debt issuance costs.

At September 30, 2013, we were in compliance with the terms of the credit agreement.

On April 22, 2013, the credit agreement was amended to (i) permit the increase of the facility by up to an additional $300 million subject to satisfaction of certain conditions, (ii) remove the restriction limiting unsecured senior or subordinated indebtedness to $200 million, while establishing certain requirements for obtaining unsecured senior or subordinated indebtedness of $200 million or more and (iii) establish less restrictive leverage covenants.

On May 3, 2013, we elected to increase the credit facility capacity by $200 million, for a total capacity of $500 million. The facility can be increased by an additional $100 million. In connection with the increase, we recorded $2.2 million of capitalized loan fees which are being amortized over the remaining life of the facility.

The credit agreement is guaranteed by all of our material domestic subsidiaries (except for SemCrude Pipeline, L.L.C. and Rose Rock Midstream, L.P. and its subsidiaries) and secured by a lien on substantially all of our property and assets, subject to customary exceptions.

Rose Rock credit facility

At September 30, 2013, there was $85.0 million outstanding cash borrowings under the Rose Rock revolving credit facility, of which $55.0 million incurred interest at the ABR plus an applicable margin, and $30 million incurred interest at the Eurodollar rate plus an applicable margin. The interest rate in effect at September 30, 2013 on $55.0 million of ABR borrowings was 4.50%. The interest rate in effect at September 30, 2013 on $30 million of Eurodollar rate borrowings was 2.53%.

Rose Rock had $31.8 million in outstanding letters of credit, and the rate in effect was 2.25%. In addition, a fronting fee of 0.25% is charged on outstanding letters of credit. A commitment fee that ranges from 0.375% to 0.50%, depending on a leverage ratio specified in the credit agreement, is charged on any unused capacity of the revolving credit facility.

On January 11, 2013, the credit facility capacity was increased to $385 million and Rose Rock borrowed $133.5 million in connection with the purchase of a 33% interest in SCPL from SemGroup and to pay transaction related expenses. Approximately $1.6 million of related costs have been capitalized and will be amortized over the remaining life of the facility.

On September 20, 2013, the credit agreement was amended to extend the agreement to September 20, 2018 and permit the increase of the facility by not more than $200 million, subject to certain conditions. The amended agreement allows the Rose Rock to incur unsecured or subordinated debt without limitation, subject to certain conditions, and provides alternative financial performance covenants at Rose Rock's election after the issuance of $200 million or more unsecured or subordinated debt, in aggregate. Additionally, the interest rate and commitment fees related to the revolving facility were lowered.

Rose Rock had $7.6 million of Secured Bilateral Letters of Credit outstanding at September 30, 2013. The interest rate in effect was 1.75% on $0.6 million and 2.0% on $7.0 million. Secured Bilateral Letters of Credit are external to the facility and do not reduce revolver availability.

We recorded $1.9 million and $0.5 million of interest expense related to this facility during the three months ended September 30, 2013 and 2012, respectively, including amortization of debt issuance costs. We recorded $6.1 million and $1.4 million of interest expense related to this facility during the nine months ended September 30, 2013 and 2012, respectively, including amortization of debt issuance costs.

At September 30, 2013, $3.7 million in capitalized loan fees, net of accumulated amortization, was recorded in other noncurrent assets, which is being amortized over the life of the facility.

At September 30, 2013, we were in compliance with the terms of the credit agreement.

SemMexico facilities

During the third quarter, SemMexico renewed a credit agreement that allows SemMexico to borrow up to 56 million Mexican pesos (U.S. $4.3 million at the September 30, 2013 exchange rate) at any time during the term of the facility. The new maturity date of the facility is July 2014. Borrowings are unsecured and bear interest at the bank prime rate in Mexico plus 1.70%. At September 30, 2013, there were no borrowings outstanding on this facility.

On June 13, 2012, SemMexico entered into a credit agreement that allows SemMexico to borrow up to 44 million Mexican pesos (U.S. $3.3 million at the September 30, 2013 exchange rate) at any time during the term of the facility, which matures in June 2015. Borrowings are unsecured and bear interest at the bank prime rate in Mexico plus 2.0%. At September 30, 2013, there were no outstanding borrowings on this facility.

SemMexico also has outstanding letters of credit of 292.8 million Mexican pesos at September 30, 2013 (U.S. $22.3 million at the September 30, 2013 exchange rate). Fees are generally charged on outstanding letters of credit at a rate of 0.5%.

At September 30, 2013, we were in compliance with the terms of these facilities.

Capitalized interest

During the nine months ended September 30, 2013 and 2012, we capitalized interest from our credit facilities of $2.9 million and $0.2 million, respectively.

Fair value

We estimate the fair value of our senior unsecured notes to be $306 million at September 30, 2013, based on unadjusted, transacted market prices, which is categorized as a Level 1 measurement. We estimate that the fair value of our other long-term debt was not materially different than the recorded values at September 30, 2013. 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 other debt outstanding at September 30, 2013. This estimate is categorized as a Level 3 measurement.

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Equity (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Comprehensive Income (Loss), Net of Tax	$ 6,105	$ 12,072	$ (4,307)	$ 14,930
Components of Accumulated Other Comprehensive Loss
Beginning Balance			(1,299)
Currency translation adjustments			(4,444)
Changes related to benefit plans, net of income tax expense of $46			137
Ending Balance	(5,606)		(5,606)
Currency Translation [Member]
Components of Accumulated Other Comprehensive Loss
Beginning Balance			1,855
Currency translation adjustments			(4,444)
Changes related to benefit plans, net of income tax expense of $46			0
Ending Balance	(2,589)		(2,589)
Employee Benefit Plans [Member]
Components of Accumulated Other Comprehensive Loss
Beginning Balance			(3,154)
Currency translation adjustments			0
Changes related to benefit plans, net of income tax expense of $46			137
Ending Balance	$ (3,017)		$ (3,017)

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Equity (Tables)

9 Months Ended

Sep. 30, 2013

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, 2012 to September 30, 2013 (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, 2012	$	420	$	1,039,189		$	(242	)	$	(145,674	)	$	(1,299	)	$	129,134		$	1,021,528
Net income	—		—			—			44,784			—			14,429			59,213
Other comprehensive income (loss), net of income taxes	—		—			—			—			(4,307		)	—			(4,307		)
Distributions to noncontrolling interests	—		—			—			—			—			(11,458		)	(11,458		)
Rose Rock Midstream, L.P. equity issuance	—		—			—			—			—			210,226			210,226
Transfer of SemCrude Pipeline interest to Rose Rock*	—		56,800			—			—			—			(90,516		)	(33,716		)
Warrants settlements	4		23,754			—			—			—			—			23,758
Dividends paid	—		(16,387		)	—			—			—			—			(16,387		)
Unvested dividend equivalent rights	—		(47		)	—			—			—			(33		)	(80		)
Non-cash equity compensation	—		4,733			—			—			—			578			5,311
Issuance of common stock under compensation plans	1		(1		)	—			—			—			—			—
Repurchase of common stock	—		—			(371		)	—			—			—			(371		)
Balance at September 30, 2013	$	425	$	1,108,041		$	(613	)	$	(100,890	)	$	(5,606	)	$	252,360		$	1,253,717

Components of Accumulated Other Comprehensive Loss

The following table presents the changes in the components of accumulated other comprehensive loss from December 31, 2012 to September 30, 2013 (in thousands):

	Currency Translation			Employee Benefit Plans			Total
Balance at December 31, 2012	$	1,855		$	(3,154	)	$	(1,299	)
Currency translation adjustment	(4,444		)	—			(4,444		)
Changes related to benefit plans, net of income tax expense of $46	—			137			137
Balance at September 30, 2013	$	(2,589	)	$	(3,017	)	$	(5,606	)

Schedule of Common Stock Reflected On The Condensed Consolidated Balance Sheet

The shares of common stock reflected on the condensed consolidated balance sheet at September 30, 2013 are summarized below:

Shares issued on Emergence Date	40,882,496
Shares subsequently issued in settlement of pre-petition claims	226,016
Remaining shares required to be issued in settlement of pre-petition claims	291,484
Issuance of shares under employee and director compensation programs(*)	689,320
Shares issued upon exercise of warrants	441,325
Total shares	42,530,641
Par value per share	$	0.01
Common stock on September 30, 2013 balance sheet (in thousands)	$	425

(*) These shares include 105,738 shares which vested during the nine months ended September 30, 2013. Of these vested shares, recipients sold back to the Company 8,591 shares to satisfy tax withholding obligations which are being recognized at cost as treasury stock on the condensed consolidated balance sheet.

Schedule of Warrants Reflected On The Condensed Consolidated Balance Sheet

The warrants reflected on the condensed consolidated balance sheet at September 30, 2013 are summarized below:

Warrants issued on Emergence Date	1,634,210
Warrants subsequently issued in settlement of pre-petition claims	237,897
Remaining warrants to be issued in settlement of pre-petition claims	306,840
Warrants exercised (*)	(818,124		)
Total warrants at September 30, 2013	1,360,823
Fair value per warrant at September 30, 2013	$	34.06
Warrant value included within other noncurrent liabilities on September 30, 2013 consolidated balance sheet	$	46,349,631

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Investments in Non-Consolidated Subsidiaries Investments in Non-Consolidated Subsidiaries (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings from equity method investments	$ 7,483	$ 3,116	$ 39,689	$ 22,903
White Cliffs Pipeline L L C [Member]
Earnings from equity method investments	10,786	10,021	31,886	25,053
NGL Energy Partners LP [Member]
Earnings from equity method investments	(3,288)	(6,905)	7,828	(2,150)
Glass Mountain Pipeline Llc [Member]
Earnings from equity method investments	$ (15)	$ 0	$ (25)	$ 0

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Earnings Per Share

9 Months Ended

Sep. 30, 2013

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 the noncontrolling interest.  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 (loss) per share (“Basic EPS”) is calculated based on the weighted average shares outstanding during the period.  Diluted earnings (loss) per share (“Diluted EPS”) includes the dilutive effect of warrants and unvested equity compensation awards.

The following summarizes the calculation of basic earnings (loss) per share for the three months and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

	Three Months Ended September 30, 2013									Three Months Ended September 30, 2012
	Continuing Operations			Discontinued Operations			Net			Continuing Operations			Discontinued Operations			Net
Income	$	3,137		$	(2	)	$	3,135		$	(167	)	$	(265	)	$	(432	)
less: Income attributable to noncontrolling interests	5,054			—			5,054			2,336			—			2,336
Numerator	$	(1,917	)	$	(2	)	$	(1,919	)	$	(2,503	)	$	(265	)	$	(2,768	)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400			41,400			41,400			41,400			41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128			1,128			1,128			549			549			549
Denominator	42,528			42,528			42,528			41,949			41,949			41,949
Basic earnings (loss) per share	$	(0.05	)	$	—		$	(0.05	)	$	(0.06	)	$	(0.01	)	$	(0.07	)

	Nine Months Ended September 30, 2013						Nine Months Ended September 30, 2012
	Continuing Operations		Discontinued Operations		Net		Continuing Operations		Discontinued Operations			Net
Income	$	59,148	$	65	$	59,213	$	9,377	$	(456	)	$	8,921
less: Income attributable to noncontrolling interests	14,429		—		14,429		7,915		—			7,915
Numerator	$	44,719	$	65	$	44,784	$	1,462	$	(456	)	$	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400		41,400		41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	874		874		874		530		530			530
Denominator	42,274		42,274		42,274		41,930		41,930			41,930
Basic earnings (loss) per share	$	1.06	$	—	$	1.06	$	0.03	$	(0.01	)	$	0.02

The following summarizes the calculation of diluted earnings (loss) per share for the three months and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):

	Three Months Ended September 30, 2013									Three Months Ended September 30, 2012
	Continuing Operations			Discontinued Operations			Net			Continuing Operations			Discontinued Operations			Net
Income	$	3,137		$	(2	)	$	3,135		$	(167	)	$	(265	)	$	(432	)
less: Income attributable to noncontrolling interests	5,054			—			5,054			2,336			—			2,336
Numerator	$	(1,917	)	$	(2	)	$	(1,919	)	$	(2,503	)	$	(265	)	$	(2,768	)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400			41,400			41,400			41,400			41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128			1,128			1,128			549			549			549
Effect of dilutive securities	—			—			—			—			—			—
Denominator	42,528			42,528			42,528			41,949			41,949			41,949
Diluted earnings (loss) per share	$	(0.05	)	$	—		$	(0.05	)	$	(0.06	)	$	(0.01	)	$	(0.07	)

	Nine Months Ended September 30, 2013						Nine Months Ended September 30, 2012
	Continuing Operations		Discontinued Operations		Net		Continuing Operations		Discontinued Operations			Net
Income	$	59,148	$	65	$	59,213	$	9,377	$	(456	)	$	8,921
less: Income attributable to noncontrolling interests	14,429		—		14,429		7,915		—			7,915
Numerator	$	44,719	$	65	$	44,784	$	1,462	$	(456	)	$	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400		41,400		41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	874		874		874		530		530			530
Effect of dilutive securities	270		270		270		252		252			252
Denominator	42,544		42,544		42,544		42,182		42,182			42,182
Diluted earnings (loss) per share	$	1.05	$	—	$	1.05	$	0.03	$	(0.01	)	$	0.02

During the three months and nine months ended September 30, 2013, we recorded expenses of $4.8 million and $37.0 million, respectively, related to the change in fair value of the warrants. During the three months and nine months ended September 30, 2012, we recorded expenses of $9.5 million and $17.1 million related to the change in fair value of the warrants. Because the mark to market valuation of the warrants resulted in losses, the warrants would have been antidilutive and, therefore, were not included in the computation of diluted earnings per share.

As we experienced losses from continuing operations for the three months ended September 30, 2013 and 2012, the equity based compensation (described in Note 10) did not cause any dilution.

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Acquisition Acquisition (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 60,676	$ 9,884
Barcas Field Services, LLC [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	16,690
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	6,018
Goodwill	27,261
Total assets acquired	$ 49,969

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Income Taxes

9 Months Ended

Sep. 30, 2013

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

Due to our emergence from bankruptcy and overall restructuring, we recorded a full valuation allowance on all U.S. federal and state deferred tax assets in all periods prior to March 31, 2013. 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.

The nine months ended September 30, 2013 includes a discrete tax benefit of $50.9 million for the partial release of our valuation allowance. The tax benefit was recorded for the three months ended March 31, 2013. Gain recognition, for tax purposes, on the contribution of a 33% interest in SemCrude Pipeline, L.L.C. to Rose Rock, as disclosed in Note 2, had a material impact to the available positive and objectively verifiable evidence for that quarter and, combined with other factors, resulted in the change in our assessment of recoverability of the deferred tax assets. Under ASC 740, "Income Taxes", such evidence was not considered in the valuation allowance at December 31, 2012, due to fundamentals of the transaction which remained subject to market influence until closed. We did not release the valuation allowance attributable to a small portion of our state net operating loss carryovers which have shorter carryover periods. 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.

We have 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 all jurisdictions. In foreign jurisdictions, all tax years within the relevant statute of limitations for periods prior to the emergence from bankruptcy remain open for examination. Currently, there are no examinations in progress for our federal or state jurisdictions. Canada Revenue Agency has initiated an income tax audit of SemCAMS ULC for the tax year 2009, which remains in progress. We do not anticipate the SemCAMS ULC audit will have a significant impact on the results of operations or financial position. No other foreign jurisdictions are currently under audit.

The effective tax rate was 52% and 109% for the three months ended September 30, 2013 and 2012, respectively, and (231)% and 10% for the nine months ended September 30, 2013 and 2012, respectively. The rate for the three months ended September 30, 2013 is impacted by a $3.3 million discrete deferred tax benefit resulting from enactment of U.K. tax rate reductions for future periods. 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, a noncontrolling interest in Rose Rock for which taxes are not provided, warrant expense which is not deductible for tax purposes, and the impact of the valuation allowance or release recorded against our deferred tax assets. 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. Deferred tax liabilities, with the exception of those related to certain long-lived assets, have been considered as a source of future taxable income in establishing the amount of the valuation allowance. These combined factors, and the magnitude of 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.

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Rose Rock Midstream, L.P.

9 Months Ended

Sep. 30, 2013

Investments in and Advances to Affiliates, Schedule of Investments [Abstract]

ROSE ROCK MIDSTREAM, L.P.

ROSE ROCK MIDSTREAM, L.P.

We control the operations of our consolidated subsidiary, Rose Rock Midstream, L.P. ("Rose Rock") through our ownership of the general partner interest. As of September 30, 2013, we own the 2% general partner interest and a 46.7% limited partner interest made up of 2.9 million common units, 8.4 million subordinated units and 1.25 million Class A units.

In August 2013, Rose Rock sold 4.75 million common limited partner units to third-party purchasers for $152.5 million, net of underwriting discounts and commissions. Proceeds were used to repay borrowings on the Rose Rock credit facility.

On January 11, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. ("SCPL") to Rose Rock in exchange for (i) cash of approximately $189.5 million, (ii) the issuance of 1.5 million common units, (iii) the issuance of 1.25 million Class A units and (iv) an increase of the capital account of the general partner of Rose Rock and a related issuance of general partner interest, to allow the general partner of Rose Rock to maintain its 2% general partner interest. SCPL owns a 51% membership interest in White Cliffs Pipeline, L.L.C. ("White Cliffs"), which owns a 527-mile pipeline that transports crude oil from Platteville, Colorado to Cushing, Oklahoma (the "White Cliffs Pipeline"), giving Rose Rock an indirect 17% interest in White Cliffs.

The Class A units are not entitled to receive any distribution of available cash (other than upon liquidation) prior to the first day of the month immediately following the first month for which the average daily throughput volumes on the White Cliffs Pipeline for such month are 125,000 barrels per day or greater. Upon such date, the Class A units will automatically convert into common units.

As this transaction was between parties under common control, Rose Rock recorded its interest in SCPL at SemGroup's historical value and, as such, no gain on the sale was recognized by SemGroup. Proceeds in excess of the historical value were accounted for as an equity transaction between Rose Rock and SemGroup and resulted in a $90.5 million reduction to noncontrolling interests in consolidated subsidiaries and an offsetting increase to additional paid-in capital of $56.8 million (net of tax impact of $33.7 million). This non-cash entry represents the portion of the proceeds in excess of historical cost which were attributed to Rose Rock's third-party unitholders.

In connection with this transaction, Rose Rock issued and sold 2.0 million common units to third-party purchasers in a private placement for aggregate consideration of $59.3 million. In addition, Rose Rock exercised the accordion feature of its revolving credit facility and increased the total borrowing capacity under the credit facility from $150 million to $385 million and made a borrowing of $133.5 million under the credit facility. The proceeds from the private placement and the borrowing were used by Rose Rock to fund the cash consideration in the transaction with us and to pay certain related transaction costs and expenses.

SemGroup incurred $1.4 million of general and administrative expense associated with the transaction including amounts expensed by Rose Rock. Rose Rock incurred $3.7 million of cost, of which $1.6 million of equity issuance costs were offset against proceeds, $1.6 million was related to the borrowing and was deferred and $0.5 million was expensed as general and administrative expense in the condensed consolidated statement of operations and comprehensive income.

Outside ownership interests in Rose Rock are reflected in “noncontrolling interests in consolidated subsidiaries” on our condensed consolidated balance sheets at September 30, 2013 and December 31, 2012. The portion of Rose Rock’s net income attributable to outside owners is reflected within “net income attributable to noncontrolling interests” in our condensed consolidated statements of operations and comprehensive income for the three months and nine months ended September 30, 2013.

We receive distributions from Rose Rock on our common and subordinated 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. Rose Rock’s partnership agreement requires Rose Rock to distribute all of its available cash each quarter in the following manner:

	Total Quarterly Distributions Per Unit Target Amount						Marginal Percentage Interest in Distributions
							Unitholders		General Partner		Incentive Distribution Rights
Minimum Quarterly Distributions					$	0.362500	98.0	%	2.0	%	—
First Target Distribution	above	$	0.362500	up to	$	0.416875	98.0	%	2.0	%	—
Second Target Distribution	above	$	0.416875	up to	$	0.453125	85.0	%	2.0	%	13.0	%
Third Target Distribution	above	$	0.453125	up to	$	0.543750	75.0	%	2.0	%	23.0	%
Thereafter				above	$	0.543750	50.0	%	2.0	%	48.0	%

The following table shows the cash distributions paid or declared during 2013 and 2012 (in thousands, except for per unit amounts):

		Record Date	Payment Date	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, 2011	*	February 3, 2012	February 13, 2012	$	0.0670	*	$	23	$	—	$	93	$	561	$	470	$	1,147
March 31, 2012		May 7, 2012	May 15, 2012	$	0.3725		$	128	$	—	$	517	$	3,125	$	2,607	$	6,377
June 30, 2012		August 6, 2012	August 14, 2012	$	0.3825		$	131	$	—	$	532	$	3,209	$	2,678	$	6,550
September 30, 2012		November 5, 2012	November 14, 2012	$	0.3925		$	134	$	—	$	545	$	3,294	$	2,748	$	6,721
December 31, 2012		February 4, 2013	February 14, 2013	$	0.4025		$	167	$	—	$	1,163	$	3,377	$	3,624	$	8,331
March 31, 2013		May 6, 2013	May 15, 2013	$	0.4300		$	179	$	41	$	1,242	$	3,607	$	3,872	$	8,941
June 30, 2013		August 5, 2013	August 14, 2013	$	0.4400		$	183	$	72	$	1,271	$	3,692	$	3,962	$	9,180
September 30, 2013	**	November 5, 2013	November 14, 2013	$	0.4500	**	$	232	$	127	$	1,301	$	3,775	$	6,189	$	11,624

*Minimum quarterly distribution for quarter ended December 31, 2011 was prorated for the period beginning immediately after the closing of Rose Rock’s IPO, December 14, 2011 through December 31, 2011.

**Expected payment date and amounts for distributions related to the quarter ended September 30, 2013.

Certain summarized balance sheet information of Rose Rock is shown below (in thousands):

	(unaudited)
	September 30, 2013		December 31, 2012
Cash	$	1,914	$	108
Other current assets	292,386		250,509
Property, plant and equipment, net	313,193		291,530
Equity method investment	77,449		—
Goodwill	27,261		—
Other noncurrent assets, net	10,536		2,579
Total assets	$	722,739	$	544,726
Current liabilities	$	254,491	$	231,843
Long-term debt	85,043		4,562
Partners’ capital attributable to SemGroup	130,845		179,187
Partners’ capital attributable to noncontrolling interests	252,360		129,134
Total liabilities and partners’ capital	$	722,739	$	544,726

Certain summarized income statement information of Rose Rock for the three months and nine months ended September 30, 2013 and 2012 is shown below (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	181,831	$	131,554	$	514,485	$	468,687
Cost of products sold	$	157,550	$	111,790	$	446,507	$	412,847
Operating, general and administrative expenses	$	12,394	$	9,779	$	30,434	$	25,976
Depreciation and amortization expense	$	4,130	$	3,066	$	11,327	$	9,032
Earnings from equity method investment	$	3,527	$	—	$	10,431	$	—
Net income	$	9,411	$	6,469	$	30,539	$	19,353

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Financial Instruments (Details 3) (Commodity Contract [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 725	$ 0
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 0	$ 1,034

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Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information
Revenue	$ 357,748	$ 277,852	$ 969,688	$ 921,660
Costs of products sold, exclusive of depreciation and amortization shown below	255,554	189,830	680,632	651,283
Operating	52,360	52,367	162,813	172,750
General and administrative	20,952	16,680	54,887	53,073
Depreciation and amortization	16,113	12,081	41,563	35,687
Loss (gain) on disposal of long-lived assets, net	408	(3,615)	(130)	(3,496)
Total expenses	345,387	267,343	939,765	909,297
Earnings from equity method investments	7,483	3,116	39,689	22,903
Operating income	19,844	13,625	69,612	35,266
Other expenses (income), net	13,294	11,701	51,769	24,904
Income (loss) from continuing operations before income taxes	6,550	1,924	17,843	10,362
Total assets (excluding intersegment receivables)	2,390,402		2,390,402		1,748,179
Crude [Member]
Segment Reporting Information
Revenue	181,831	131,616	514,485	468,748
Costs of products sold, exclusive of depreciation and amortization shown below	157,550	111,790	446,507	412,847
Operating	9,098	6,042	20,527	17,957
General and administrative	3,360	5,015	10,778	9,796
Depreciation and amortization	4,130	3,066	11,327	9,032
Loss (gain) on disposal of long-lived assets, net	0	(3,500)	(25)	(3,444)
Total expenses	174,138	122,413	489,114	446,188
Earnings from equity method investments	10,771	10,021	31,861	25,053
Operating income	18,464	19,224	57,232	47,613
Other expenses (income), net	3,634	(119)	10,925	(739)
Income (loss) from continuing operations before income taxes	14,830	19,343	46,307	48,352
Total assets (excluding intersegment receivables)	1,012,535		1,012,535
SemStream [Member]
Segment Reporting Information
Revenue	0	0		7
Costs of products sold, exclusive of depreciation and amortization shown below	0	0	0	33
Operating	0	7	1	(18)
General and administrative	114	528	430	582
Depreciation and amortization	0	0	0	0
Loss (gain) on disposal of long-lived assets, net	0	0	6	0
Total expenses	114	535	437	597
Earnings from equity method investments	(3,288)	(6,905)	7,828	(2,150)
Operating income	(3,402)	(7,440)	7,391	(2,740)
Other expenses (income), net	(1,238)	(2,551)	(3,399)	(2,507)
Income (loss) from continuing operations before income taxes	(2,164)	(4,889)	10,790	(233)
Total assets (excluding intersegment receivables)	187,632		187,632
SemCAMS [Member]
Segment Reporting Information
Revenue	48,979	54,301	151,219	169,149
Costs of products sold, exclusive of depreciation and amortization shown below	106	309	290	499
Operating	33,980	40,081	116,372	135,165
General and administrative	3,446	3,354	10,933	10,404
Depreciation and amortization	2,631	2,664	7,925	7,910
Loss (gain) on disposal of long-lived assets, net	0	0	0	0
Total expenses	40,163	46,408	135,520	153,978
Earnings from equity method investments	0	0	0	0
Operating income	8,816	7,893	15,699	15,171
Other expenses (income), net	4,720	3,419	14,179	13,974
Income (loss) from continuing operations before income taxes	4,096	4,474	1,520	1,197
Total assets (excluding intersegment receivables)	320,431		320,431
SemGas [Member]
Segment Reporting Information
Revenue	65,795	29,878	151,460	89,452
Costs of products sold, exclusive of depreciation and amortization shown below	48,403	24,068	111,141	70,607
Operating	5,436	2,931	13,869	9,092
General and administrative	1,923	1,329	5,112	4,564
Depreciation and amortization	4,992	1,797	9,353	5,153
Loss (gain) on disposal of long-lived assets, net	679	(3)	673	(3)
Total expenses	61,433	30,122	140,148	89,413
Earnings from equity method investments	0	0	0	0
Operating income	4,362	(244)	11,312	39
Other expenses (income), net	880	(378)	2,149	924
Income (loss) from continuing operations before income taxes	3,482	134	9,163	(885)
Total assets (excluding intersegment receivables)	510,129		510,129
SemLogistics [Member]
Segment Reporting Information
Revenue	2,169	2,213	7,827	8,610
Costs of products sold, exclusive of depreciation and amortization shown below	0	97	0	196
Operating	1,616	1,436	5,303	4,521
General and administrative	1,679	990	4,285	4,249
Depreciation and amortization	2,334	2,388	6,987	7,040
Loss (gain) on disposal of long-lived assets, net	0	0	0	0
Total expenses	5,629	4,911	16,575	16,006
Earnings from equity method investments	0	0	0	0
Operating income	(3,460)	(2,698)	(8,748)	(7,396)
Other expenses (income), net	(217)	337	896	1,805
Income (loss) from continuing operations before income taxes	(3,243)	(3,035)	(9,644)	(9,201)
Total assets (excluding intersegment receivables)	167,741		167,741
SemMexico [Member]
Segment Reporting Information
Revenue	65,549	62,095	160,375	193,229
Costs of products sold, exclusive of depreciation and amortization shown below	56,070	55,817	138,372	174,636
Operating	2,230	1,870	6,741	6,033
General and administrative	2,510	1,501	7,175	6,730
Depreciation and amortization	1,529	1,536	4,467	4,614
Loss (gain) on disposal of long-lived assets, net	(271)	(112)	(784)	(49)
Total expenses	62,068	60,612	155,971	191,964
Earnings from equity method investments	0	0	0	0
Operating income	3,481	1,483	4,404	1,265
Other expenses (income), net	(21)	(82)	(339)	233
Income (loss) from continuing operations before income taxes	3,502	1,565	4,743	1,032
Total assets (excluding intersegment receivables)	95,317		95,317
Corporate and Other [Member]
Segment Reporting Information
Revenue	(6,575)	(2,251)	(15,678)	(7,535)
Costs of products sold, exclusive of depreciation and amortization shown below	(6,575)	(2,251)	(15,678)	(7,535)
Operating		0	0	0
General and administrative	7,920	3,963	16,174	16,748
Depreciation and amortization	497	630	1,504	1,938
Loss (gain) on disposal of long-lived assets, net	0	0	0	0
Total expenses	1,842	2,342	2,000	11,151
Earnings from equity method investments	0	0	0	0
Operating income	(8,417)	(4,593)	(17,678)	(18,686)
Other expenses (income), net	5,536	11,075	27,358	11,214
Income (loss) from continuing operations before income taxes	(13,953)	(15,668)	(45,036)	(29,900)
Total assets (excluding intersegment receivables)	96,617		96,617
Operating Segments [Member]
Segment Reporting Information
Revenue	357,748	277,852	969,688	921,660
Operating Segments [Member] | Crude [Member]
Segment Reporting Information
Revenue	181,831	131,616	514,485	468,748
Operating Segments [Member] | SemStream [Member]
Segment Reporting Information
Revenue	0	0	0	7
Operating Segments [Member] | SemCAMS [Member]
Segment Reporting Information
Revenue	48,979	54,301	151,219	169,149
Operating Segments [Member] | SemGas [Member]
Segment Reporting Information
Revenue	59,220	27,627	135,782	81,917
Operating Segments [Member] | SemLogistics [Member]
Segment Reporting Information
Revenue	2,169	2,213	7,827	8,610
Operating Segments [Member] | SemMexico [Member]
Segment Reporting Information
Revenue	65,549	62,095	160,375	193,229
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information
Revenue	0	0	0
Intersegment Eliminations [Member]
Segment Reporting Information
Revenue	0	0	0	0
Intersegment Eliminations [Member] | Crude [Member]
Segment Reporting Information
Revenue	0	0	0	0
Intersegment Eliminations [Member] | SemStream [Member]
Segment Reporting Information
Revenue	0	0	0	0
Intersegment Eliminations [Member] | SemCAMS [Member]
Segment Reporting Information
Revenue	0	0	0	0
Intersegment Eliminations [Member] | SemGas [Member]
Segment Reporting Information
Revenue	6,575	2,251	15,678	7,535
Intersegment Eliminations [Member] | SemLogistics [Member]
Segment Reporting Information
Revenue	0	0	0	0
Intersegment Eliminations [Member] | SemMexico [Member]
Segment Reporting Information
Revenue	0	0	0	0
Intersegment Eliminations [Member] | Corporate and Other [Member]
Segment Reporting Information
Revenue	$ (6,575)	$ (2,251)	$ (15,678)	$ (7,535)

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Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2013

Related Party Transactions [Abstract]

Related Party Transactions

During the three and nine months endedSeptember 30, 2013 and 2012, we generated the following transactions with NGL Energy (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenues	$	31,043	$	14,395	$	66,367	$	41,945
Purchases	$	8,018	$	6,009	$	8,018	$	36,573
Reimbursements from NGL Energy for transition services	$	60	$	28	$	156	$	526

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Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic earnings per share
Income (loss)	$ 3,137	$ (167)	$ 59,148	$ 9,377
Income (loss) from discontinued operations, net of income taxes	(2)	(265)	65	(456)
Net income	3,135	(432)	59,213	8,921
Less: net income attributable to noncontrolling interests	5,054	2,336	14,429	7,915
Numerator	(1,919)	(2,768)	44,784	1,006
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128	549	874	530
Denominator, Net, Basic	42,528	41,949	42,274	41,930
Basic earnings (loss) per share, Net	$ (0.05)	$ (0.07)	$ 1.06	$ 0.02
Continuing Operations [Member]
Basic earnings per share
Income (loss)	3,137	(167)	59,148	9,377
Less: net income attributable to noncontrolling interests	5,054	2,336	14,429	7,915
Numerator	(1,917)	(2,503)	44,719	1,462
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128	549	874	530
Denominator, Net, Basic	42,528	41,949	42,274	41,930
Basic earnings per share, Continuing Operations	$ (0.05)	$ (0.06)	$ 1.06	$ 0.03
Discontinued Operations [Member]
Basic earnings per share
Income (loss) from discontinued operations, net of income taxes	(2)	(265)	65	(456)
Less: net income attributable to noncontrolling interests	0	0	0	0
Numerator	$ (2)	$ (265)	$ 65	$ (456)
Common stock issued and to be issued pursuant to Plan of Reorganization	41,400	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans and warrant exercises	1,128	549	874	530
Denominator, Net, Basic	42,528	41,949	42,274	41,930
Basic earnings per share, Discontinued Operations	$ 0.00	$ (0.01)	$ 0.00	$ (0.01)

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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013 bbl
Fixed Price Sales [Member]
Summary Of Purchase And Sale Commitments
Sale commitments, Volume (barrels)	330,000
Sale commitments, Value	$ 34,749
Floating Price Sales [Member]
Summary Of Purchase And Sale Commitments
Sale commitments, Volume (barrels)	18,600,000
Sale commitments, Value	1,814,662
Fixed Price Purchases [Member]
Summary Of Purchase And Sale Commitments
Purchase commitments, Volume (barrels)	202,000
Purchase commitments, Value	20,324
Floating Price Purchases [Member]
Summary Of Purchase And Sale Commitments
Purchase commitments, Volume (barrels)	18,016,000
Purchase commitments, Value	$ 1,781,247

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Acquisition Acquisition (Notes)

9 Months Ended

Sep. 30, 2013

Acquisition [Abstract]

Mergers, Acquisitions and Dispositions Disclosures [Text Block]

14. ACQUISITIONS

Mid-America Midstream Gas Services, L.L.C.

On August 1, 2013, we acquired the equity interest of Mid-America Midstream Gas Services, L.L.C. ("MMGS"), a wholly owned subsidiary of Chesapeake Energy Corporation (NYSE: CHK)("Chesapeake"), which is the owner of gas gathering and processing assets in the Mississippi Lime play for approximately $316.1 million in cash. We incurred approximately $3.6 million in transaction related general and administrative expenses. The transaction was funded through the combination of a portion of the net proceeds from the sale of the Notes and a borrowing under the revolving credit facility under SemGroup's corporate credit agreement. Highlights of the acquisition include the following:

• 200 miles of gathering pipeline;

• Rose Valley I plant - A 200 mmcf/d (million cubic feet per day) cryogenic processing plant, expected to be in operation in the first quarter of 2014;

• Rose Valley II plant - A 200 mmcf/d cryogenic processing plant, expected to be in operation in the first quarter of 2016;

• Approximately 540,000 net acre dedication in the core of the Mississippi Lime play, supported by a recently announced joint venture between Chesapeake and Sinopec International Petroleum Exploration and Production Corporation ("Sinopec"); and

• A 20-year, 100% fee based, gas gathering and processing agreement with certain affiliates of Chesapeake and Sinopec.

Rose Valley plants I and II will require approximately $125 million of additional capital expenditures for completion as well as additional capital related to future well connections.

We have included MMGS in our condensed consolidated financial statements as of August 1, 2013 in our SemGas segment. During the three months and nine months ended September 30, 2013, our condensed consolidated statements of operations and comprehensive income did not include material amounts of revenue or operating income related to MMGS. The proforma impact to comparative prior year periods, had the acquisition occurred at the beginning of the comparative prior year period, is not significant as the business is in the development stage.

We have received a preliminary independent appraisal of the fair value of the assets acquired in the MMGS acquisition. The estimates of fair value reflected as of September 30, 2013 are subject to change and such changes could be material. We currently expect to complete this process prior to filing our Form 10-K for the year ending December 31, 2013. We have preliminarily estimated the fair value of the assets acquired as follows (in thousands):

Property, plant and equipment	$	123,316
Customer contract intangible	169,244
Goodwill	23,587
Total assets acquired	$	316,147

Goodwill represents the excess of the estimated consideration paid for the acquired business over the fair value of the individual assets acquired. Goodwill primarily represents the value of synergies between the acquired entity and the Company and the opportunity to use the acquired business as a platform for growth. We estimate that all of the goodwill will be deductible for federal income tax purposes and will be amortized on a straight-line basis over 15 years.

Barcas Field Services, LLC

On August 1, 2013, our consolidated subsidiary, Rose Rock, executed a definitive agreement to acquire the assets of Barcas Field Services, LLC ("Barcas"), which owns and operates a crude oil trucking fleet for $50.0 million in cash. The transaction closed on September 1, 2013. Highlights of the acquisition include the following:

• 114 trucks, 120 trailers and miscellaneous equipment; and

• a long-term take-or-pay customer transportation agreement.

We have included Barcas in our condensed consolidated financial statements as of September 1, 2013 in our Crude segment. During the three months and nine months ended September 30, 2013, our condensed consolidated statements of operations and comprehensive income did not include material amounts of revenue or operating income related to Barcas. The proforma impact to comparative prior year periods, had the acquisition occurred at the beginning of the comparative prior year period, is not significant.

We have received a preliminary independent appraisal of the fair value of the assets acquired in the Barcas acquisition. The estimates of fair value reflected as of September 30, 2013 are subject to change and such changes could be material. We currently expect to complete this process prior to filing our Form 10-K for the year ending December 31, 2013. We have preliminarily estimated the fair value of the assets acquired as follows (in thousands):

Property, plant and equipment	$	16,690
Customer contract intangible	6,018
Goodwill	27,261
Total assets acquired	$	49,969

Goodwill represents the excess of the estimated consideration paid for the acquired business over the fair value of the individual assets acquired. Goodwill primarily represents the value of synergies between the acquired entity and the Company, the opportunity to use the acquired business as a platform for growth, and the acquired assembled workforce. We estimate that all of the goodwill will be deductible for federal income tax purposes and will be amortized on a straight-line basis over 15 years.

NGL Energy

On August 6, 2013, we completed the acquisition of approximately 5.36% of the general partner of NGL Energy, which increases our ownership of NGL Energy's general partner to 11.78%.

Goodwill

The above acquisitions accounted for the majority of the change to our goodwill during the nine months ended September 30, 2013, as follows (in thousands):

Balance at December 31, 2012	$	9,884
Acquisitions	50,848
Currency translation adjustments	(56		)
Balance at September 30, 2013	$	60,676

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Equity

9 Months Ended

Sep. 30, 2013

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, 2012 to September 30, 2013 (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, 2012	$	420	$	1,039,189		$	(242	)	$	(145,674	)	$	(1,299	)	$	129,134		$	1,021,528
Net income	—		—			—			44,784			—			14,429			59,213
Other comprehensive income (loss), net of income taxes	—		—			—			—			(4,307		)	—			(4,307		)
Distributions to noncontrolling interests	—		—			—			—			—			(11,458		)	(11,458		)
Rose Rock Midstream, L.P. equity issuance	—		—			—			—			—			210,226			210,226
Transfer of SemCrude Pipeline interest to Rose Rock*	—		56,800			—			—			—			(90,516		)	(33,716		)
Warrants settlements	4		23,754			—			—			—			—			23,758
Dividends paid	—		(16,387		)	—			—			—			—			(16,387		)
Unvested dividend equivalent rights	—		(47		)	—			—			—			(33		)	(80		)
Non-cash equity compensation	—		4,733			—			—			—			578			5,311
Issuance of common stock under compensation plans	1		(1		)	—			—			—			—			—
Repurchase of common stock	—		—			(371		)	—			—			—			(371		)
Balance at September 30, 2013	$	425	$	1,108,041		$	(613	)	$	(100,890	)	$	(5,606	)	$	252,360		$	1,253,717

* On January 13, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. to our consolidated subsidiary, Rose Rock. As this transaction was between entities under common control, the interest in SemCrude Pipeline, L.L.C. was recorded by Rose Rock based on SemGroup's book value. This amount represents the purchase price in excess of book value which was attributed to the noncontrolling interest owners of Rose Rock. The entry to additional paid-in capital has been recorded net of tax.

Accumulated other comprehensive loss

The following table presents the changes in the components of accumulated other comprehensive loss from December 31, 2012 to September 30, 2013 (in thousands):

	Currency Translation			Employee Benefit Plans			Total
Balance at December 31, 2012	$	1,855		$	(3,154	)	$	(1,299	)
Currency translation adjustment	(4,444		)	—			(4,444		)
Changes related to benefit plans, net of income tax expense of $46	—			137			137
Balance at September 30, 2013	$	(2,589	)	$	(3,017	)	$	(5,606	)

There were no significant items reclassified out of accumulated other comprehensive loss to net income for the three months and nine months ended September 30, 2013.

Common stock

Upon emergence from bankruptcy, we issued 40,882,496 shares of common stock. The Plan of Reorganization specified that we were to issue an additional 517,500 shares of common stock in settlement of pre-petition claims. As of September 30, 2013, we have issued 226,016 shares of this stock and will issue the remainder as the process of resolving the claims progresses. The owners’ equity balances on the condensed consolidated balance sheets include the shares that are required to be issued in settlement of pre-petition claims. The shares of common stock reflected on the condensed consolidated balance sheet at September 30, 2013 are summarized below:

Shares issued on Emergence Date	40,882,496
Shares subsequently issued in settlement of pre-petition claims	226,016
Remaining shares required to be issued in settlement of pre-petition claims	291,484
Issuance of shares under employee and director compensation programs(*)	689,320
Shares issued upon exercise of warrants	441,325
Total shares	42,530,641
Par value per share	$	0.01
Common stock on September 30, 2013 balance sheet (in thousands)	$	425

(*) These shares include 105,738 shares which vested during the nine months ended September 30, 2013. Of these vested shares, recipients sold back to the Company 8,591 shares to satisfy tax withholding obligations which are being recognized at cost as treasury stock on the condensed consolidated balance sheet.

In addition to the shares in the table above, there are shares of unvested restricted stock outstanding at September 30, 2013. The par value of these shares has not yet been reflected in common stock on the condensed consolidated balance sheet, as these shares have not yet vested. There are also shares of restricted stock that were returned to treasury upon forfeiture. The par value of these shares is not reflected in the condensed consolidated balance sheet, as no accounting recognition is given to forfeited shares.

The common stock includes Class A and Class B stock. Class A stock is eligible to be listed on an exchange, whereas Class B stock is not. Any share of Class B stock may be converted to Class A at the election of the holder. Both classes of stock have full voting rights. Both classes of stock have a par value of $0.01 per share. The total number of shares authorized for issuance is 90,000,000 shares of Class A stock and 10,000,000 shares of Class B stock.

Equity-based compensation

We have reserved common stock for issuance pursuant to director and employee compensation programs. At September 30, 2013, there were approximately 534,000 unvested shares that have been granted under these 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. Shares of restricted stock awards that were forfeited were returned to treasury. The par value of these shares is not reflected in the condensed consolidated balance sheet, as no accounting recognition is given to forfeited shares. 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 141,000 additional shares could vest. The holders of certain restricted stock awards granted prior to 2013 are entitled to equivalent dividends (“UDs”) to be received upon vesting of the restricted stock awards. The dividends will be settled in common shares based on the market price of our Class A shares as of the close of business on the vesting date. The UDs are subject to the same forfeiture and acceleration conditions as the associated restricted stock awards. At September 30, 2013, the value of the UDs related to unvested restricted stock awards was approximately $78 thousand. This is equivalent to 1,366 Class A shares based on the quarter end close of business market price of our Class A shares of $57.02 per share. Dividends related to the 2013 restricted stock awards will be settled in cash upon vesting.

During the nine months ended September 30, 2013, we have issued 201,451 restricted stock awards with a weighted average grant date fair value of $52.78 per award.

Warrants

Upon emergence from bankruptcy, we issued 1,634,210 warrants. The Plan of Reorganization specified that we were to issue an additional 544,737 warrants in settlement of the pre-petition claims. As of September 30, 2013, we have issued 237,897 of the warrants and will issue the remainder as the process of resolving the claims progresses. The warrants are traded on the New York Stock Exchange under the ticker symbol SEMGWS. We classify the warrant fair value as a Level 1 measurement. The warrants reflected on the condensed consolidated balance sheet at September 30, 2013 are summarized below:

Warrants issued on Emergence Date	1,634,210
Warrants subsequently issued in settlement of pre-petition claims	237,897
Remaining warrants to be issued in settlement of pre-petition claims	306,840
Warrants exercised (*)	(818,124		)
Total warrants at September 30, 2013	1,360,823
Fair value per warrant at September 30, 2013	$	34.06
Warrant value included within other noncurrent liabilities on September 30, 2013 consolidated balance sheet	$	46,349,631

(*) During the nine months ended September 30, 2013, certain warrant holders exercised a total of 772,817 warrants resulting in the issuance of 425,618 Class A shares.

Each warrant entitles the holder to purchase one share of common stock for $25 at any time before the November 30, 2014 expiration date. Upon exercise, a holder may elect a cashless exercise, whereby the number of shares to be issued to the holder is reduced, in lieu of a cash payment. In the event of a change in control of the Company, the holders of the warrants would have the right to sell the warrants to us, and we would have the right to purchase the warrants from the holders. In either case, the price to be paid for the warrants would be calculated using a standard pricing model with inputs specified in the warrant agreement.

Employee Stock Purchase Plan

As part of the Company's 2013 Annual Meeting of Stockholders held on May 22, 2013, Company stockholders approved the 2013 Employee Stock Purchase Plan (“ESPP”). The ESPP will be effective October 1, 2013 and will allow Company employees to purchase the Company's Class A stock through payroll deductions based on six month offering periods. Share purchases will be limited to 12,500 shares per offering period per employee-participant. Shares will be able to be purchased by employee-participants at 85% of the Fair Market Value (as defined by the ESPP). Upon the purchase of shares, employee-participants will receive all stockholder rights including dividend and voting rights, and will be permitted to sell their shares at any time. The Company has made 1.0 million shares available under the ESPP. The ESPP terminates on September 30, 2023 or earlier at the discretion of the Board of Directors. No shares are expected to be issued under the ESPP in fiscal year 2013 as the end of the first offering period does not occur until March 31, 2014. The Company expects to begin recording stock based compensation expense related to the ESPP in the fourth quarter for 2013, the start of the first offering period.

Dividends

On May 30, 2013, we paid a dividend of $0.19 per share to shareholders of record on May 20, 2013. On August 30, 2013, we paid a dividend of $0.20 per share to shareholders of record on August 19, 2013.

On November 6, 2013, we declared a dividend of $0.21 per share payable on December 3, 2013 to shareholders of record on November 22, 2013.

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Earnings Per Share (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share (Textual) [Abstract]
Expense on the change in the fair value of the warrants	$ 4.8	$ 9.5	$ 37.0	$ 17.1

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Financial Instruments Financial Instruments (Policies)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments, Policy [Policy Text Block]

“Level 1” measurements use as inputs 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. These also include common stock warrants (Note 10) which are traded on the New York Stock Exchange.

“Level 2” measurements use as inputs market observable and corroborated prices for similar commodity derivative contracts. Assets and liabilities classified as Level 2 include over-the-counter (“OTC”) traded forward contracts and swaps.

“Level 3” measurements use as inputs information from a pricing service and internal valuation models incorporating observable and unobservable market data. These may 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.

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 September 30, 2013, 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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Condensed Consolidating Guarantor Financial Statements (Notes)

9 Months Ended

Sep. 30, 2013

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Financial Information of Parent Company Only Disclosure [Text Block]

15. CONDENSED CONSOLIDATING GUARANTOR FINANCIAL STATEMENTS

Pursuant to the Registration Rights Agreement related to our offering of $300 million of 7.50% senior unsecured notes, as discussed in Note 8, we intend to file a registration statement with the SEC so that holders of the Notes can exchange the Notes and the related guarantees for the Exchange Notes and related guarantees.

Each of the Guarantors is 100% owned by SemGroup Corporation (the "Parent"). Such guarantees of the Notes are full and unconditional and constitute the joint and several obligations of the Guarantors. The guarantees of the Exchange Notes will be full and unconditional and will 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.

Unaudited condensed consolidating financial statements for the Parent, the Guarantors and non-guarantors as of September 30, 2013 and December 31, 2012 and for each of the three months and nine months ended September 30, 2013 and 2012 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 a 33% interest in SCPL to Rose Rock in the first quarter of 2013 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

	September 30, 2013
	Parent		Guarantors		Non-guarantors		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	9,711	$	—	$	58,135	$	(3,128	)	$	64,718
Restricted cash	32,880		—		1,302		—			34,182
Accounts receivable	640		11,256		356,350		—			368,246
Receivable from affiliates	752		15,189		244		(3,146		)	13,039
Inventories	—		1,164		45,445		—			46,609
Other current assets	2,417		330		12,420		—			15,167
Total current assets	46,400		27,939		473,896		(6,274		)	541,961
Property, plant and equipment	4,521		318,805		733,790		—			1,057,116
Equity method investments	1,475,019		524,300		228,076		(1,709,246		)	518,149
Goodwill	—		23,587		37,089		—			60,676
Other intangible assets	32		167,834		12,031		—			179,897
Other noncurrent assets, net	19,745		1,172		11,686		—			32,603
Total assets	$	1,545,717	$	1,063,637	$	1,496,568	$	(1,715,520	)	$	2,390,402
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	104	$	44,888	$	258,680	$	—		$	303,672
Payable to affiliates	14		121		1,967		—			2,102
Accrued liabilities	14,715		8,026		58,773		(5		)	81,509
Payables to pre-petition creditors	32,317		—		55		—			32,372
Deferred revenue	—		—		18,835		—			18,835
Other current liabilities	97		714		8,309		—			9,120
Current portion of long-term debt	—		—		26		—			26
Total current liabilities	47,247		53,749		346,645		(5		)	447,636
Long-term debt	455,000		—		85,043		—			540,043
Deferred income taxes	976		—		52,612		—			53,588
Other noncurrent liabilities	46,358		—		49,060		—			95,418
Commitments and contingencies
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	996,136		1,009,888		710,848		(1,715,515		)	1,001,357
Noncontrolling interests in consolidated subsidiaries	—		—		252,360		—			252,360
Total owners’ equity	996,136		1,009,888		963,208		(1,715,515		)	1,253,717
Total liabilities and owners’ equity	$	1,545,717	$	1,063,637	$	1,496,568	$	(1,715,520	)	$	2,390,402

	December 31, 2012
	Parent		Guarantors		Non-guarantors		Consolidating Adjustments			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	19,123	$	—	$	63,844	$	(2,938	)	$	80,029
Restricted cash	33,324		—		1,354		—			34,678
Accounts receivable	1,155		7,927		337,087		—			346,169
Receivable from affiliates	827		7,222		109		(1,980		)	6,178
Inventories	—		181		34,252		—			34,433
Other current assets	2,528		312		15,676		—			18,516
Total current assets	56,957		15,642		452,322		(4,918		)	520,003
Property, plant and equipment	5,399		122,899		686,426		—			814,724
Equity method investments	1,104,832		468,033		138,970		(1,324,033		)	387,802
Goodwill	—		—		9,884		—			9,884
Other intangible assets	36		—		7,549		—			7,585
Other noncurrent assets, net	3,606		1,317		3,258		—			8,181
Total assets	$	1,170,830	$	607,891	$	1,298,409	$	(1,328,951	)	$	1,748,179
LIABILITIES AND OWNERS’ EQUITY
Current liabilities:
Accounts payable	$	70	$	12,304	$	241,249	$	—		$	253,623
Accrued liabilities	8,972		4,546		50,313		—			63,831
Payables to pre-petition creditors	32,876		—		57		—			32,933
Deferred revenue	—		—		18,973		—			18,973
Other current liabilities	134		580		4,263		(17		)	4,960
Current portion of long-term debt	—		—		24		—			24
Total current liabilities	42,052		17,430		314,879		(17		)	374,344
Long-term debt	201,500		—		4,562		—			206,062
Deferred income taxes	2,018		—		63,602		—			65,620
Other noncurrent liabilities	32,866		—		47,759		—			80,625
Commitments and contingencies
Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	892,394		590,461		738,473		(1,328,934		)	892,394
Noncontrolling interests in consolidated subsidiaries	—		—		129,134		—			129,134
Total owners’ equity	892,394		590,461		867,607		(1,328,934		)	1,021,528
Total liabilities and owners’ equity	$	1,170,830	$	607,891	$	1,298,409	$	(1,328,951	)	$	1,748,179

Condensed Consolidating Guarantor Statements of Operations

	Three Months Ended September 30, 2013
	Parent			Guarantors		Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	63,623	$	231,404		$	(6,575	)	$	288,452
Service	—			1,174		35,228			—			36,402
Other	—			—		32,894			—			32,894
Total revenues	—			64,797		299,526			(6,575		)	357,748
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			47,657		214,472			(6,575		)	255,554
Operating	—			5,069		47,291			—			52,360
General and administrative	7,855			2,242		10,855			—			20,952
Depreciation and amortization	497			4,838		10,778			—			16,113
Loss (gain) on disposal of long-lived assets, net	—			679		(271		)	—			408
Total expenses	8,352			60,485		283,125			(6,575		)	345,387
Earnings from equity method investments	15,497			24,667		10,787			(43,468		)	7,483
Operating income	7,145			28,979		27,188			(43,468		)	19,844
Other expenses (income):
Interest expense	4,029			1,314		5,136			(1,399		)	9,080
Foreign currency transaction gain	—			—		(457		)	—			(457		)
Other expense, net	3,383			1		(112		)	1,399			4,671
Total other expenses, net	7,412			1,315		4,567			—			13,294
Income (loss) from continuing operations before income taxes	(267		)	27,664		22,621			(43,468		)	6,550
Income tax expense (benefit)	4,960			—		(1,547		)	—			3,413
Income (loss) from continuing operations	(5,227		)	27,664		24,168			(43,468		)	3,137
Loss from discontinued operations, net of income taxes	—			—		(2		)	—			(2		)
Net income (loss)	(5,227		)	27,664		24,166			(43,468		)	3,135
Less: net income attributable to noncontrolling interests	—			—		5,054			—			5,054
Net income (loss) attributable to SemGroup	$	(5,227	)	$	27,664	$	19,112		$	(43,468	)	$	(1,919	)
Net income (loss)	$	(5,227	)	$	27,664	$	24,166		$	(43,468	)	$	3,135
Other comprehensive income (loss), net of income taxes	(2,162		)	—		8,267			—			6,105
Comprehensive income (loss)	(7,389		)	27,664		32,433			(43,468		)	9,240
Less: comprehensive income attributable to noncontrolling interests	—			—		5,054			—			5,054
Comprehensive income (loss) attributable to SemGroup	$	(7,389	)	$	27,664	$	27,379		$	(43,468	)	$	4,186

	Three Months Ended September 30, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	28,781		$	182,672		$	(2,251	)	$	209,202
Service	—			282			29,518			—			29,800
Other	—			62			38,788			—			38,850
Total revenues	—			29,125			250,978			(2,251		)	277,852
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			23,483			168,598			(2,251		)	189,830
Operating	—			3,055			49,312			—			52,367
General and administrative	3,840			2,793			10,047			—			16,680
Depreciation and amortization	628			1,649			9,804			—			12,081
Gain on disposal of long-lived assets, net	—			(3		)	(3,612		)	—			(3,615		)
Total expenses	4,468			30,977			234,149			(2,251		)	267,343
Earnings from equity method investments	14,201			20,904			10,021			(42,010		)	3,116
Operating income	9,733			19,052			26,850			(42,010		)	13,625
Other expenses (income):
Interest expense	4,262			(2,230		)	1,346			(1,386		)	1,992
Foreign currency transaction loss	—			—			355			—			355
Other expense (income), net	8,152			(50		)	(134		)	1,386			9,354
Total other expenses, net	12,414			(2,280		)	1,567			—			11,701
Income (loss) from continuing operations before income taxes	(2,681		)	21,332			25,283			(42,010		)	1,924
Income tax expense	96			—			1,995			—			2,091
Income (loss) from continuing operations	(2,777		)	21,332			23,288			(42,010		)	(167		)
Loss from discontinued operations, net of income taxes	—			(4		)	(261		)	—			(265		)
Net income (loss)	(2,777		)	21,328			23,027			(42,010		)	(432		)
Less: net income attributable to noncontrolling interests	—			—			2,336			—			2,336
Net income (loss) attributable to SemGroup	$	(2,777	)	$	21,328		$	20,691		$	(42,010	)	$	(2,768	)
Net income (loss)	$	(2,777	)	$	21,328		$	23,027		$	(42,010	)	$	(432	)
Other comprehensive loss, net of income taxes	1,475			—			10,597			—			12,072
Comprehensive income (loss)	(1,302		)	21,328			33,624			(42,010		)	11,640
Less: comprehensive income attributable to noncontrolling interests	—			—			2,336			—			2,336
Comprehensive income (loss) attributable to SemGroup	$	(1,302	)	$	21,328		$	31,288		$	(42,010	)	$	9,304

	Nine Months Ended September 30, 2013
	Parent			Guarantors		Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	146,880	$	634,117		$	(15,663	)	$	765,334
Service	—			1,646		94,091			—			95,737
Other	—			—		108,617			—			108,617
Total revenues	—			148,526		836,825			(15,663		)	969,688
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			108,814		587,481			(15,663		)	680,632
Operating	—			13,041		149,772			—			162,813
General and administrative	15,983			6,347		32,557			—			54,887
Depreciation and amortization	1,504			8,898		31,161			—			41,563
Loss (gain) on disposal of long-lived assets, net	—			682		(812		)	—			(130		)
Total expenses	17,487			137,782		800,159			(15,663		)	939,765
Earnings from equity method investments	52,432			63,011		31,886			(107,640		)	39,689
Operating income	34,945			73,755		68,552			(107,640		)	69,612
Other expenses (income):
Interest expense	1,112			3,141		15,845			(4,127		)	15,971
Foreign currency transaction gain	—			—		(973		)	—			(973		)
Other expense (income), net	32,826			159		(341		)	4,127			36,771
Total other expenses, net	33,938			3,300		14,531			—			51,769
Income from continuing operations before income taxes	1,007			70,455		54,021			(107,640		)	17,843
Income tax benefit	(40,469		)	—		(836		)	—			(41,305		)
Income from continuing operations	41,476			70,455		54,857			(107,640		)	59,148
Income (loss) from discontinued operations, net of income taxes	—			66		(1		)	—			65
Net income	41,476			70,521		54,856			(107,640		)	59,213
Less: net income attributable to noncontrolling interests	—			—		14,429			—			14,429
Net income attributable to SemGroup	$	41,476		$	70,521	$	40,427		$	(107,640	)	$	44,784
Net income	$	41,476		$	70,521	$	54,856		$	(107,640	)	$	59,213
Other comprehensive income (loss), net of income taxes	190			—		(4,497		)	—			(4,307		)
Comprehensive income	41,666			70,521		50,359			(107,640		)	54,906
Less: comprehensive income attributable to noncontrolling interests	—			—		14,429			—			14,429
Comprehensive income attributable to SemGroup	$	41,666		$	70,521	$	35,930		$	(107,640	)	$	40,477

	Nine Months Ended September 30, 2012
	Parent		Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—	$	86,158		$	629,770		$	(7,520	)	$	708,408
Service	—		951			85,776			—			86,727
Other	—		69			126,456			—			126,525
Total revenues	—		87,178			842,002			(7,520		)	921,660
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—		68,874			589,929			(7,520		)	651,283
Operating	—		9,255			163,495			—			172,750
General and administrative	16,528		6,109			30,436			—			53,073
Depreciation and amortization	1,938		4,707			29,042			—			35,687
Gain on disposal of long-lived assets, net	—		(3		)	(3,493		)	—			(3,496		)
Total expenses	18,466		88,942			809,409			(7,520		)	909,297
Earnings from equity method investments	36,721		39,992			25,053			(78,863		)	22,903
Operating income	18,255		38,228			57,646			(78,863		)	35,266
Other expenses (income):
Interest expense	4,064		(915		)	8,609			(3,995		)	7,763
Foreign currency transaction loss	—		—			358			—			358
Other expense (income), net	12,902		(19		)	(95		)	3,995			16,783
Total other expenses (income), net	16,966		(934		)	8,872			—			24,904
Income from continuing operations before income taxes	1,289		39,162			48,774			(78,863		)	10,362
Income tax expense	286		—			699			—			985
Income from continuing operations	1,003		39,162			48,075			(78,863		)	9,377
Income (loss) from discontinued operations, net of income taxes	3		(11		)	(448		)	—			(456		)
Net income	1,006		39,151			47,627			(78,863		)	8,921
Less: net income attributable to noncontrolling interests	—		—			7,915			—			7,915
Net income attributable to SemGroup	$	1,006	$	39,151		$	39,712		$	(78,863	)	$	1,006
Net income	$	1,006	$	39,151		$	47,627		$	(78,863	)	$	8,921
Other comprehensive income, net of income taxes	984		—			13,946			—			14,930
Comprehensive income	1,990		39,151			61,573			(78,863		)	23,851
Less: comprehensive income attributable to noncontrolling interests	—		—			7,915			—			7,915
Comprehensive income attributable to SemGroup	$	1,990	$	39,151		$	53,658		$	(78,863	)	$	15,936

Condensed Consolidating Guarantor Statements of Cash Flows

	Nine Months Ended September 30, 2013
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by operating activities	$	19,717		$	16,424		$	74,197		$	(13,819	)	$	96,519
Cash flows from investing activities:
Capital expenditures	(622		)	(65,845		)	(65,183		)	—			(131,650		)
Proceeds from sale of long-lived assets	—			3			1,045			—			1,048
Proceeds from the sale of interest in SemCrude Pipeline, L.L.C. to Rose Rock Midstream L.P.	189,500			—			—			(189,500		)	—
Investments in non-consolidated subsidiaries	(18,775		)	(28,031		)	(96,657		)	—			(143,463		)
Payments to acquire businesses	—			(306,232		)	(49,969		)	—			(356,201		)
Distributions in excess of equity in earnings of affiliates	5,541			—			7,550			—			13,091
Net cash provided by (used in) investing activities	175,644			(400,105		)	(203,214		)	(189,500		)	(617,175		)
Cash flows from financing activities:
Debt issuance costs	(9,037		)	—			(2,828		)	—			(11,865		)
Borrowings on credit facilities	575,000			—			353,474			—			928,474
Principal payments on credit facilities and other obligations	(321,500		)	—			(272,903		)	—			(594,403		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			210,226			—			210,226
Distributions to noncontrolling interests	—			—			(11,458		)	—			(11,458		)
Proceeds from warrant exercises	225			—			—			—			225
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(371		)	—			—			—			(371		)
Dividends paid	(16,387		)	—			—			—			(16,387		)
Intercompany borrowings (advances), net	(432,703		)	383,681			(154,107		)	203,129			—
Net cash provided by (used in) financing activities	(204,773		)	383,681			122,404			203,129			504,441
Effect of exchange rate changes on cash and cash equivalents	—			—			904			—			904
Change in cash and cash equivalents	(9,412		)	—			(5,709		)	(190		)	(15,311		)
Cash and cash equivalents at beginning of period	19,123			—			63,844			(2,938		)	80,029
Cash and cash equivalents at end of period	$	9,711		$	—		$	58,135		$	(3,128	)	$	64,718

	Nine Months Ended September 30, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by (used in) operating activities	$	(4,374	)	$	11,105		$	58,353		$	(13,326	)	$	51,758
Cash flows from investing activities:
Capital expenditures	(1,621		)	(41,706		)	(38,796		)	—			(82,123		)
Proceeds from sale of long-lived assets	—			12			335			—			347
Investments in non-consolidated subsidiaries	(1,740		)	(62,464		)	205			—			(63,999		)
Proceeds from the sale of non-consolidated affiliate	—			—			3,500			—			3,500
Distributions in excess of equity in earnings of affiliates	5,062			—			5,507			—			10,569
Net cash provided by (used in) investing activities	1,701			(104,158		)	(29,249		)	—			(131,706		)
Cash flows from financing activities:
Debt issuance costs	(455		)	—			(239		)	—			(694		)
Borrowings on credit facilities	184,000			—			76,500			—			260,500
Principal payments on credit facilities and other obligations	(76,500		)	—			(102,501		)	—			(179,001		)
Distributions to noncontrolling interests	—			—			(5,754		)	—			(5,754		)
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(242		)	—			—			—			(242		)
Intercompany borrowing (advances), net	(98,381		)	93,053			(8,086		)	13,414			—
Net cash provided by (used in) financing activities	8,422			93,053			(40,080		)	13,414			74,809
Effect of exchange rate changes on cash and cash equivalents	—			—			(977		)	—			(977		)
Change in cash and cash equivalents	5,749			—			(11,953		)	88			(6,116		)
Change in cash and cash equivalents included in discontinued operations	—			—			(36		)	—			(36		)
Change in cash and cash equivalents from continuing operations	5,749			—			(11,989		)	88			(6,152		)
Cash and cash equivalents at beginning of period	111			—			76,264			(2,762		)	73,613
Cash and cash equivalents at end of period	$	5,860		$	—		$	64,275		$	(2,674	)	$	67,461

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013 Class A	Oct. 31, 2013 Class B
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2013
Entity Registrant Name	SemGroup Corp
Entity Central Index Key	0001489136
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		42,445,841	28,235

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Overview (Policies)

9 Months Ended

Sep. 30, 2013

Overview [Abstract]

Basis of presentation

Basis of presentation

The accompanying condensed consolidated 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.

The accompanying condensed consolidated financial statements are unaudited. The condensed consolidated balance sheet at December 31, 2012, is derived from audited financial statements.

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 nine months ended September 30, 2013, are not necessarily indicative of the results to be expected for the full year ending December 31, 2013.

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. 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, 2012, which are included in our Annual Report on Form 10-K for the year ended December 31, 2012, filed with the SEC.

Certain reclassifications have been made to conform previously reported balances to the current presentation.

Our significant accounting policies are consistent with those described in our Annual Report on Form 10-K for the year ended December 31, 2012.

Recent accounting pronouncements

Recent accounting pronouncements

On January 31, 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2013-01, "Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities," which clarifies the scope of the offsetting disclosure requirements in ASU 2011-11, "Disclosures About Offsetting Assets and Liabilities." Under ASU 2013-01, the disclosure requirements apply to derivative instruments accounted for in accordance with Accounting Standards Codification ("ASC") 815, "Derivatives and Hedging," including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending arrangements that are either offset on the balance sheet or subject to an enforceable master netting arrangement or similar agreement. ASU 2013-01 is effective for fiscal years beginning on or after January 1, 2013, and interim periods within those years. Retrospective application is required for all comparative periods presented. We adopted this guidance in the first quarter of 2013. The impact of adoption was not material.

On February 5, 2013, the FASB issued ASU 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income." This ASU adds new disclosure requirements for items reclassified out of accumulated other comprehensive income ("AOCI"). The ASU is intended to help entities improve the transparency of changes in other comprehensive income ("OCI") and items reclassified out of AOCI in their financial statements. It does not amend any existing requirements for reporting net income or OCI in the financial statements. We adopted this guidance in the first quarter of 2013. The impact of adoption was not material.

On February 28, 2013, the FASB issued ASU 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date (a consensus of the FASB Emerging Issues Task Force)." The ASU requires entities to “measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date, as the sum of the following:

•the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors; and

•any additional amount the reporting entity expects to pay on behalf of its co-obligors.”

Required disclosures include a description of the joint and several arrangement and the total outstanding amount of the obligation for all joint parties. The ASU permits entities to aggregate disclosures (as opposed to providing separate disclosures for each joint and several obligation). These disclosure requirements are incremental to the existing related-party disclosure requirements in ASC 850, "Related Party Disclosures." The ASU is effective for public entities for all prior periods in fiscal years beginning on or after December 15, 2013, and interim reporting periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

On March 4, 2013, the FASB issued ASU 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment Upon Derecognition of Certain Subsidiaries or Groups of Assets Within a Foreign Entity or of an Investment in a Foreign Entity - a consensus of the FASB Emerging Issues Task Force”, which indicates that the entire amount of a cumulative translation adjustment ("CTA") related to an entity's investment in a foreign entity should be released when there has been a:

• sale of a subsidiary or group of net assets within a foreign entity and the sale represents the substantially complete liquidation of the investment in the foreign entity;

• loss of a controlling financial interest in an investment in a foreign entity (i.e., the foreign entity is deconsolidated); or

• step acquisition for a foreign entity (i.e., when an entity has changed from applying the equity method for an investment in a foreign entity to consolidating the foreign entity).

The ASU does not change the requirement to release a pro rata portion of the CTA of the foreign entity into earnings for a partial sale of an equity method investment in a foreign entity. For public entities, this ASU is effective for fiscal years beginning on or after December 15, 2013, and interim periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

In July 2013, the FASB issued ASU 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," which requires an unrecognized tax benefit to be classified as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except in certain circumstances. For public entities, this ASU is effective for fiscal years beginning on or after December 15, 2013, and interim periods within those years. The Company will adopt this guidance in the first quarter of 2014. The impact is not expected to be material.

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Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
SemGroup owners' equity:
Beginning Balance			$ 1,021,528
Net income (loss) attributable to SemGroup	3,135	(432)	59,213		8,921
Other comprehensive income (loss), net of income taxes	6,105	12,072	(4,307)		14,930
Distributions to noncontrolling interests			(11,458)
Noncontrolling interest, increase from equity issuance			210,226
Sale of interest in equity investment to related party			(33,716)	[1]
Stock issued during period from warrant exercises			23,758
Dividends			(16,387)
Dividends, Share-based Compensation, Cash			(80)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			5,311
Issuance of common stock under compensation plans			0
Repurchase of common stock			(371)
Ending Balance	1,253,717		1,253,717
Common Stock [Member]
SemGroup owners' equity:
Beginning Balance			420
Net income (loss) attributable to SemGroup			0
Other comprehensive income (loss), net of income taxes			0
Distributions to noncontrolling interests			0
Noncontrolling interest, increase from equity issuance			0
Sale of interest in equity investment to related party			0	[1]
Stock issued during period from warrant exercises			4
Dividends			0
Dividends, Share-based Compensation, Cash			0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Issuance of common stock under compensation plans			1
Repurchase of common stock			0
Ending Balance	425		425
Additional Paid-In Capital [Member]
SemGroup owners' equity:
Beginning Balance			1,039,189
Net income (loss) attributable to SemGroup			0
Other comprehensive income (loss), net of income taxes			0
Distributions to noncontrolling interests			0
Noncontrolling interest, increase from equity issuance			0
Sale of interest in equity investment to related party			56,800	[1]
Stock issued during period from warrant exercises			23,754
Dividends			(16,387)
Dividends, Share-based Compensation, Cash			(47)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			4,733
Issuance of common stock under compensation plans			(1)
Repurchase of common stock			0
Ending Balance	1,108,041		1,108,041
Treasury Stock [Member]
SemGroup owners' equity:
Beginning Balance			(242)
Net income (loss) attributable to SemGroup			0
Other comprehensive income (loss), net of income taxes			0
Distributions to noncontrolling interests			0
Noncontrolling interest, increase from equity issuance			0
Sale of interest in equity investment to related party			0	[1]
Stock issued during period from warrant exercises			0
Dividends			0
Dividends, Share-based Compensation, Cash			0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Issuance of common stock under compensation plans			0
Repurchase of common stock			(371)
Ending Balance	(613)		(613)
Accumulated Deficit [Member]
SemGroup owners' equity:
Beginning Balance			(145,674)
Net income (loss) attributable to SemGroup			44,784
Other comprehensive income (loss), net of income taxes			0
Distributions to noncontrolling interests			0
Noncontrolling interest, increase from equity issuance			0
Sale of interest in equity investment to related party			0	[1]
Stock issued during period from warrant exercises			0
Dividends			0
Dividends, Share-based Compensation, Cash			0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Issuance of common stock under compensation plans			0
Repurchase of common stock			0
Ending Balance	(100,890)		(100,890)
Accumulated Other Comprehensive Income (Loss) [Member]
SemGroup owners' equity:
Beginning Balance			(1,299)
Net income (loss) attributable to SemGroup			0
Other comprehensive income (loss), net of income taxes			(4,307)
Distributions to noncontrolling interests			0
Noncontrolling interest, increase from equity issuance			0
Sale of interest in equity investment to related party			0	[1]
Stock issued during period from warrant exercises			0
Dividends			0
Dividends, Share-based Compensation, Cash			0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Issuance of common stock under compensation plans			0
Repurchase of common stock			0
Ending Balance	(5,606)		(5,606)
Noncontrolling Interest [Member]
SemGroup owners' equity:
Beginning Balance			129,134
Net income (loss) attributable to SemGroup			14,429
Other comprehensive income (loss), net of income taxes			0
Distributions to noncontrolling interests			(11,458)
Noncontrolling interest, increase from equity issuance			210,226
Sale of interest in equity investment to related party			(90,516)	[1]
Stock issued during period from warrant exercises			0
Dividends			0
Dividends, Share-based Compensation, Cash			(33)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			578
Issuance of common stock under compensation plans			0
Repurchase of common stock			0
Ending Balance	$ 252,360		$ 252,360

[1] * On January 13, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. to our consolidated subsidiary, Rose Rock. As this transaction was between entities under common control, the interest in SemCrude Pipeline, L.L.C. was recorded by Rose Rock based on SemGroup's book value. This amount represents the purchase price in excess of book value which was attributed to the noncontrolling interest owners of Rose Rock. The entry to additional paid-in capital has been recorded net of tax.

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Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended			3 Months Ended			3 Months Ended
	Sep. 30, 2013 sites	Dec. 31, 2012	Aug. 18, 2011 Sem Crude [Member] bbl	Sep. 30, 2013 Crude [Member] sites	Sep. 30, 2013 SemGas [Member] sites	Sep. 30, 2013 SemCAMS [Member]	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]	Sep. 30, 2013 Capacity [Member] SemGas [Member]	Sep. 30, 2013 Commitments [Member] SemGas [Member]
Commitments and Contingencies (Textual) [Abstract]
Loss contingency claims, number of barrels of crude oil claimed to be owed			141,000
Site contingency number of sites checked	6			5	1
Number of sites requiring remediation and water contamination as per phase two investigations	4
Accrued liability, estimated fines and environmental contributions						$ 400,000
Asset retirement obligation liability						42,100,000
Estimated cost to retire facilities						104,600,000
Notice required to cancel purchase agreements, days							30 days	120 days
Due under the contract	81,509,000	63,831,000								25,800
Future obligations									$ 88,200,000