Semgroup (SEMG) 10-K 28 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 28, 2013	Jan. 31, 2014	Jan. 31, 2014
			Class A [Member]	Class B
Document Type	'10-K	'	'	'
Amendment Flag	'false	'	'	'
Document Period End Date	31-Dec-13	'	'	'
Document Fiscal Period Focus	'FY	'	'	'
Document Fiscal Year Focus	'2013	'	'	'
Entity Registrant Name	'SemGroup Corporation	'	'	'
Entity Central Index Key	'0001489136	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'
Entity Filer Category	'Large Accelerated Filer	'	'	'
Entity Common Stock, Shares Outstanding	'	'	42,452,997	28,235
Entity Well-known Seasoned Issuer	'Yes	'	'	'
Entity Public Float	'	$2,259,318,526	'	'
Entity Current Reporting Status	'Yes	'	'	'
Entity Voluntary Filers	'No	'	'	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$79,351	$80,029
Restricted cash	5,119	34,678
Accounts receivable (net of allowance of $3,661 and $3,687 at December 31, 2013 and 2012, respectively)	323,965	346,169
Receivable from affiliates	67,273	6,178
Inventories	44,295	34,433
Other current assets	14,011	18,516
Total current assets	534,014	520,003
Property, plant and equipment (net of accumulated depreciation of $188,720 and $130,886 at December 31, 2013 and 2012, respectively)	1,105,728	814,724
Equity method investments	565,124	387,802
Goodwill	62,021	9,884
Other intangible assets (net of accumulated amortization of $12,655 and $6,701 at December 31, 2013 and 2012, respectively)	174,838	7,585
Other noncurrent assets, net	28,889	8,181
Total assets	2,470,614	1,748,179
Current liabilities:	'	'
Accounts payable	254,467	253,623
Payable to affiliates	62,279	0
Accrued liabilities	83,429	63,831
Payables to pre-petition creditors	3,177	32,933
Warrant liability	58,134	0
Deferred revenue	25,538	18,973
Other current liabilities	12,153	4,960
Current portion of long-term debt	37	24
Total current liabilities	499,214	374,344
Long-term debt	615,088	206,062
Deferred income taxes	100,945	65,620
Other noncurrent liabilities	41,504	80,625
Commitments and contingencies (Note 17)	'	'
SemGroup Corporation ownersb equity:	'	'
Common stock (Note 18)	425	420
Additional paid-in capital	1,154,516	1,039,189
Treasury stock, at cost (Note 18)	-613	-242
Accumulated deficit	-97,572	-145,674
Accumulated other comprehensive loss	-2,854	-1,299
Total SemGroup Corporation ownersb equity	1,053,902	892,394
Noncontrolling interests in consolidated subsidiaries	159,961	129,134
Total ownersb equity	1,213,863	1,021,528
Total liabilities and ownersb equity	$2,470,614	$1,748,179

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts receivable, net of allowance	$3,661	$3,687
Property, plant and equipment, net of accumulated depreciation	188,720	130,886
Other intangible assets, net of accumulated amortization	$12,655	$6,701

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:	'	'	'
Product	$1,145,104	$953,738	$1,237,313
Service	140,198	117,721	123,345
Other	141,714	166,038	104,588
Total revenues	1,427,016	1,237,497	1,465,246
Expenses:	'	'	'
Costs of products sold, exclusive of depreciation and amortization shown below	1,020,100	874,885	1,144,439
Operating	223,585	224,700	155,041
General and administrative	78,597	71,918	75,447
Depreciation and amortization	66,409	48,210	49,823
Loss (gain) on disposal or impairment of long-lived assets, net	239	3,531	-301
Total expenses	1,388,452	1,216,182	1,425,051
Earnings from equity method investments	52,477	36,036	15,004
Gain on issuance of common units by equity method investee	26,873	0	0
Operating income (loss)	117,914	57,351	55,199
Other expenses (income):	'	'	'
Interest expense	25,142	8,902	60,138
Foreign currency transaction loss (gain)	-1,633	298	-3,450
Other expense (income), net	45,906	21,271	-11,539
Total other expenses, net	69,415	30,471	45,149
Income (loss) from continuing operations before income taxes	48,499	26,880	10,050
Income tax expense (benefit)	-17,254	-2,078	-2,310
Income (loss) from continuing operations	65,753	28,958	12,360
Income (loss) from discontinued operations, net of income taxes	59	2,939	-9,548
Net income (loss)	65,812	31,897	2,812
Less: net income attributable to noncontrolling interests	17,710	9,797	435
Net income (loss) attributable to SemGroup	48,102	22,100	2,377
Other comprehensive income (loss):	'	'	'
Currency translation adjustments	-6,363	12,635	-13,075
Other, net of income tax	4,808	-59	-1,915
Total other comprehensive income (loss)	-1,555	12,576	-14,990
Comprehensive income (loss)	64,257	44,473	-12,178
Less: comprehensive income attributable to noncontrolling interests	17,710	9,797	435
Comprehensive income (loss) attributable to SemGroup	$46,547	$34,676	($12,613)
Net income (loss) per common share (Note 18):	'	'	'
Basic	$1.14	$0.53	$0.06
Diluted	$1.13	$0.52	($0.06)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Owners' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
In Thousands
Beginning Balance at Dec. 31, 2010	$855,068	$415	$1,023,727	$0	($170,189)	$1,115	$0
Net income (loss)	2,812	0	0	0	2,377	0	435
Other comprehensive income (loss)	-14,990	0	0	0	0	-14,990	0
Non-cash equity compensation	8,641	0	8,641	0	0	0	0
Issuance of common stock under compensation plans	0	3	-3	0	0	0	0
Net proceeds from issuance of Rose Rock Midstream, L.P. common units	127,134	0	0	0	0	0	127,134
Ending Balance at Dec. 31, 2011	978,665	418	1,032,365	0	-167,812	-13,875	127,569
Net income (loss)	31,897	0	0	0	22,100	0	9,797
Other comprehensive income (loss)	12,576	0	0	0	0	12,576	0
Distributions to noncontrolling interests	-8,502	0	0	0	0	0	-8,502
Non-cash equity compensation	6,503	0	6,195	0	0	0	308
Issuance of common stock under compensation plans	0	2	-2	0	0	0	0
Repurchase of common stock	-242	0	0	-242	0	0	0
Other	0	0	0	0	38	0	-38
Warrants exercised	631	0	631	0	0	0	0
Ending Balance at Dec. 31, 2012	1,021,528	420	1,039,189	-242	-145,674	-1,299	129,134
Net income (loss)	65,812	0	0	0	48,102	0	17,710
Other comprehensive income (loss)	-1,555	0	0	0	0	-1,555	0
Distributions to noncontrolling interests	-17,647	0	0	0	0	0	-17,647
Non-cash equity compensation	7,330	0	6,524	0	0	0	806
Issuance of common stock under compensation plans	0	1	-1	0	0	0	0
Repurchase of common stock	-371	0	0	-371	0	0	0
Net proceeds from issuance of Rose Rock Midstream, L.P. common units	210,226	0	0	0	0	0	210,226
Transfer of SemCrude Pipeline interest to Rose Rock	-67,291	0	112,929	0	0	0	-180,220
Warrants exercised	21,379	4	21,375	0	0	0	0
Dividends paid	-25,429	0	-25,429	0	0	0	0
Unvested dividend equivalent rights	-119	0	-71	0	0	0	-48
Ending Balance at Dec. 31, 2013	$1,213,863	$425	$1,154,516	($613)	($97,572)	($2,854)	$159,961

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net income (loss)	$65,812	$31,897	$2,812
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'
Net unrealized (gain) loss related to derivative instruments	-974	1,196	-14,114
Depreciation and amortization	66,409	48,646	51,189
Loss (gain) on disposal or impairment of long-lived assets, net	216	6,621	-9,497
Equity earnings from investments	-52,477	-36,036	-15,004
Gain on issuance of common units by equity method investee	-26,873	0	0
Distributions from equity investments	63,651	36,440	15,004
Amortization and write down of debt issuance costs	2,732	2,425	30,338
Deferred tax benefit	-36,274	-11,818	-9,847
Non-cash compensation expense	7,330	6,503	8,641
(Gain) loss on fair value of warrants	46,433	21,310	-5,012
Provision for uncollectible accounts receivable, net of recoveries	-372	-315	-7,421
Currency (gain) loss	-1,633	298	-3,450
Changes in operating assets and liabilities (Note 22)	39,861	-14,283	11,408
Net cash provided by operating activities	173,409	79,642	74,041
Cash flows from investing activities:	'	'	'
Capital expenditures	-215,609	-119,319	-65,995
Proceeds from sale of long-lived assets	1,279	2,641	1,125
Investments in non-consolidated subsidiaries	-173,868	-78,253	-3,717
Payments to acquire businesses	-362,456	0	0
Proceeds from sale of non-consolidated affiliate	0	3,500	0
Proceeds from the sale of SemStream assets	0	12,250	93,054
Distributions in excess of equity in earnings of affiliates	12,246	17,290	12,455
Net cash provided by (used in) investing activities	-738,408	-161,891	36,922
Cash flows from financing activities:	'	'	'
Debt issuance costs	-14,936	-707	-12,533
Borrowings on debt and other obligations	1,268,474	318,000	263,905
Principal payments on debt and other obligations	-859,412	-222,066	-503,189
Distributions to noncontrolling interests	-17,647	-8,502	0
Proceeds from warrant exercises	225	0	0
Repurchase of common stock	-371	-242	0
Dividends paid	-25,429	0	0
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	210,226	0	127,134
Net cash provided by (used in) financing activities	561,130	86,483	-124,683
Effect of exchange rate changes on cash and cash equivalents	3,191	-610	-34
Change in cash and cash equivalents	-678	3,624	-13,754
Change in cash and cash equivalents included in discontinued operations	0	2,792	-454
Change in cash and cash equivalents from continuing operations	-678	6,416	-14,208
Cash and cash equivalents at beginning of period	80,029	73,613	87,821
Cash and cash equivalents at end of period	$79,351	$80,029	$73,613

Overview

Overview	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Overview	'
	OVERVIEW
	SemGroup Corporation is a Delaware corporation headquartered in Tulsa, Oklahoma that provides diversified services for end-users and consumers of crude oil, natural gas, natural gas liquids, refined products and asphalt. SemGroup Corporation began operations on November 30, 2009, as the successor entity of SemGroup, L.P., which was an Oklahoma limited partnership.
	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 applications for creditor protection in Canada under the Companies’ Creditors Arrangement Act (the “CCAA”). 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 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 on November 30, 2009 (the “Emergence Date”).
	The accompanying consolidated financial statements include the activities of SemGroup Corporation and its subsidiaries. The terms “we,” “our,” “us,” “the Company” and similar language used in these notes to consolidated financial statements refer to SemGroup Corporation and its subsidiaries.
	Our reportable segments include the following:
	•	Crude conducts crude oil transportation, storage, terminalling, gathering and marketing operations in the United States. Crude’s assets include:
	•	the 2% general partner interest and a 51.6% limited partner interest in Rose Rock Midstream, L.P. ("Rose Rock"), which owns an approximate 624-mile crude oil pipeline network in Kansas and Oklahoma, a crude oil gathering, storage and marketing business in the Bakken Shale in North Dakota and Montana, a crude oil storage facility in Cushing, Oklahoma with a capacity of 7.35 million barrels and a crude oil trucking fleet of over 130 transport trucks and trailers;
	•	a 51% ownership 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”); and
	•	a 50% ownership interest in Glass Mountain Pipeline LLC ("Glass Mountain" or "GMP"), which constructed and will 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.
	•	SemStream, which owns 9,133,409 common units representing 12.8% of the total limited partner interests, as of September 30, 2013, in NGL Energy Partners LP (“NGL Energy”) (NYSE: NGL), which owns and operates wholesale and retail propane storage and distribution assets, crude oil logistics and water treatment services in the United States, and a 11.78% interest in the general partner of NGL Energy. We report the results of our investment in NGL Energy on a one-quarter lag (Note 5).
	•	SemCAMS, which provides natural gas gathering and processing services in Alberta, Canada. SemCAMS owns working interests in, and operates, four natural gas processing plants and a network of approximately 600 miles of natural gas gathering and transportation pipelines.
	•	SemGas, which provides natural gas gathering and processing services in the United States. SemGas owns and operates over 1,300 miles of gathering pipelines in Kansas, Oklahoma, and Texas and three processing plants in Oklahoma and Texas.
	•	SemLogistics, which provides refined product and crude oil storage services in the United Kingdom. SemLogistics owns a facility in Wales that has a storage capacity of approximately 8.7 million barrels.
	•	SemMexico, which purchases, produces, stores, and distributes liquid asphalt cement products in Mexico. SemMexico operates twelve manufacturing plants, one emulsion distribution terminal and three portable rail unloading facilities.

Consolidation_And_Basis_Of_Pre

Consolidation And Basis Of Presentation	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Consolidation and Basis of Presentation	'
	CONSOLIDATION AND BASIS OF PRESENTATION
	The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States.
	Consolidated subsidiaries
	Our consolidated financial statements include the accounts of our controlled subsidiaries, including Rose Rock. All significant transactions between our consolidated subsidiaries have been eliminated. Outside ownership interests in consolidated subsidiaries are reported as noncontrolling interests in the consolidated financial statements.
	Proportionally consolidated assets
	Our SemCAMS segment owns undivided interests in certain natural gas gathering and processing assets, for which we record only our proportionate share of the assets on the consolidated balance sheets. The net book value of the property, plant and equipment recorded by us associated with these undivided interests is approximately $206.4 million at December 31, 2013. We serve as operator of these facilities and incur the costs of operating the facilities (recorded as operating expenses in the consolidated statements of operations) and charge the other owners for their proportionate share of the costs (recorded as other revenue in the consolidated statements of operations).
	Equity method investments
	We own a 51% interest in White Cliffs. The other owners have substantive rights to participate in the management of White Cliffs. Because of this, we account for it under the equity method. In 2013, we sold two-thirds of our interest in SemCrude Pipeline, which holds the 51% interest in White Cliffs, to our consolidated subsidiary Rose Rock. We will continue to account for our interest under the equity method. No gain was recorded on the transaction as it was between entities under common control.
	On November 1, 2011, we contributed the long-lived assets and certain working capital of our SemStream segment to NGL Energy in return for limited partner interests in NGL Energy, an interest in the general partner of NGL Energy, and cash for working capital (Note 7). We hold two seats on the board of directors of the general partner of NGL Energy, and we account for our investment in NGL Energy and its general partner under the equity method.
	In April 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, Oklahoma. Construction was completed in January 2014. The Glass Mountain Pipeline is accounted for under the equity method. Our joint venture partner is Gavilon, LLC ("Gavilon"), a subsidiary of NGL Energy.
	Discontinued operations
	During 2012, we completed the disposition of SemStream's residential propane supply business in Arizona, which is accounted for as a discontinued operation (Note 8).

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Summary of Signifcant Accounting Policies	'
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	USE OF ESTIMATES—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. Our significant estimates include, but are not limited to: (1) allowances for doubtful accounts receivable; (2) estimated useful lives of assets, which impact depreciation; (3) estimated fair values of long-lived assets used in impairment tests; (4) fair values of derivative instruments; and (5) accrual and disclosure of contingent losses. Although management believes these estimates are reasonable, actual results could differ materially from these estimates.
	CASH AND CASH EQUIVALENTS—Cash includes currency on hand and demand and time deposits with banks or other financial institutions. Cash equivalents include highly liquid investments with maturities of three months or less at the date of purchase. Balances at financial institutions may exceed federally insured limits.
	RESTRICTED CASH—Our Plan of Reorganization specified the total amount of consideration we would provide to all pre-petition creditors in settlement of their claims. At December 31, 2013, we had not yet completed the process of disbursing funds to settle pre-petition claims, as we had not yet completed the process of resolving all of the claims. The restricted cash balance of $5.1 million at December 31, 2013 is primarily restricted for this purpose.
	ACCOUNTS RECEIVABLE—Accounts receivable are reported net of the allowance for doubtful accounts. Our assessment of the allowance for doubtful accounts is based on several factors, including the overall creditworthiness of our customers, existing economic conditions, and the amount and age of past due accounts. We enter into netting arrangements with certain counterparties to help mitigate credit risk. Receivables subject to netting are presented as gross receivables (with the related accounts payable also presented gross) until such time as the balances are settled. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are written off against the allowance for doubtful accounts only after all collection attempts have been exhausted.
	INVENTORIES—Inventories primarily consist of natural gas and natural gas liquids, crude oil, and asphalt. Inventories are valued at the lower of cost or market, with cost generally determined using the weighted-average method. The cost of inventory includes applicable transportation costs.
	We enter into exchanges with third parties whereby we acquire products that differ in location, grade, or delivery date from products we have available for sale. These exchanges are valued at cost, and although a transportation, location or product differential may be recorded, generally no gain or loss is recognized.
	PROPERTY, PLANT AND EQUIPMENT—Property, plant and equipment is recorded at cost. We capitalize costs that extend or increase the future economic benefits of property, plant and equipment, and expense maintenance costs that do not. When assets are disposed of, their cost and related accumulated depreciation are removed from the balance sheet, and any resulting gain or loss is recorded as a gain or loss on disposal or impairment of long-lived assets in the consolidated statements of operations.
	Our SemCAMS segment operates plants which periodically undergo planned major maintenance activities, typically occurring every four to five years.  Planned major maintenance projects that do not increase the overall life or capacity of the related assets are recorded in operating expense as incurred, whereas major maintenance activity costs that materially increase the life or capacity of the underlying assets are capitalized. When maintenance expenses are recoverable from the producers who use the plants, they are recorded as revenue, and typically include a 10% overhead fee.
	Depreciation is calculated primarily on the straight-line method over the following estimated useful lives:
	Pipelines and related facilities	10 – 31 years
	Storage and terminal facilities	10 – 25 years
	Natural gas gathering and processing facilities	10 – 31 years
	Office and other property and equipment	3 – 31 years
	Construction in process is reclassified to the fixed asset categories above and depreciation commences once the asset has been placed in-service.
	LINEFILL—Pipelines and storage facilities generally require a minimum volume of product in the system to enable the system to operate. Such product, known as linefill, is generally not available to be withdrawn from the system. Linefill owned by us in facilities operated by us is recorded at historical cost, is included in property, plant and equipment in the consolidated balance sheets, and is not depreciated. We also own linefill in third-party facilities, which is included in inventory on the consolidated balance sheets.
	IMPAIRMENT OF LONG-LIVED ASSETS—We test long-lived asset groups for impairment when events or circumstances indicate that the net book value of the asset group may not be recoverable. We test an asset group for impairment by estimating the undiscounted cash flows expected to result from its use and eventual disposition. If the estimated undiscounted cash flows are lower than the net book value of the asset group, we then estimate the fair value of the asset group and record a reduction to the net book value of the assets and a corresponding impairment loss.
	GOODWILL—We test goodwill for impairment on an annual basis, or more often if circumstances warrant, by estimating the fair value of the asset group to which the goodwill relates and comparing this fair value to the net book value of the asset group. If fair value is less than net book value, we estimate the implied fair value of goodwill, reduce the book value of the goodwill to the implied fair value, and record a corresponding impairment loss. Our policy is to test goodwill for impairment on October 1 of each year. See Note 7 for discussion of goodwill impairment.
	During September 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-08, “Testing Goodwill for Impairment”. This ASU is designed to simplify how entities test goodwill for impairment. Under the new standard, an entity may first assess qualitative factors to determine whether it is more likely than not that the fair value of an asset group is less than the carrying amount, for the purpose of determining whether it is necessary to estimate the fair value of the asset group to which the goodwill relates. We adopted this guidance on January 1, 2012. We tested goodwill for impairment on October 1st in accordance with our policy. However, we did not elect to perform the qualitative assessment for impairment testing.
	INTANGIBLE ASSETS—Intangible assets are stated at cost, net of accumulated amortization, which is recorded on a straight-line or accelerated basis over the life of the asset. We review amortizable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. If such a review should indicate that the carrying amount of amortizable intangible assets is not recoverable, we reduce the carrying amount of such assets to fair value.
	EQUITY METHOD INVESTMENTS—We account for an investment under the equity method when we have significant influence over, but not control of, the significant operating decisions of the investee. Under the equity method, we record in the consolidated statements of operations our share of the earnings or losses of the investee, with a corresponding adjustment to the investment balance on our consolidated balance sheet. When we receive a distribution from an equity method investee, we record a corresponding reduction to the investment balance. When an equity method investee issues additional ownership interests which dilute our ownership interest, we recognize a gain or loss in our consolidated statements of operations.
	For equity method investments for which we do not expect financial information to be consistently available on a timely basis to apply the equity method currently, our policy is to apply the equity method consistently on a one-quarter lag.
	DEBT ISSUANCE COSTS—Costs incurred in connection with the issuance of long-term debt are reported as other noncurrent assets and are amortized to interest expense using the straight-line method over the term of the related debt. Use of the straight-line method of amortization does not differ materially from the “effective interest” method.
	COMMODITY DERIVATIVE INSTRUMENTS—We generally record the fair value of commodity derivative instruments on the consolidated balance sheets and the change in fair value as an increase or decrease to product revenue.
	As shown in Note 14, the fair value of commodity derivatives at December 31, 2013 and 2012 are recorded to other current assets or other current liabilities on the consolidated balance sheets. Related margin deposits are recorded to other current assets or other current liabilities on the consolidated balance sheets. Margin deposits are not generally netted against derivative assets or liabilities.
	The fair value of a derivative contract is determined based on the nature of the transaction and the market in which the transaction was executed. Quoted market prices, when available, are used to value derivative transactions. In situations where quoted market prices are not readily available, we estimate the fair value using other valuation techniques that reflect the best information available under the circumstances. Fair value measurements of derivative assets include consideration of counterparty credit risk. Fair value measurements of derivative liabilities include consideration of our creditworthiness.
	We have elected “normal purchase” and “normal sale” treatment for certain commitments to purchase or sell petroleum products at future dates. This election is only available when a transaction that would ordinarily meet the definition of a derivative but instead is expected to result in physical delivery of product over a reasonable period in the normal course of business and is not expected to be net settled. Agreements accounted for under this election are not recorded at fair value; instead, the transaction is recorded when the product is delivered.
	On January 31, 2013, the FASB issued 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.
	PAYABLES TO PRE-PETITION CREDITORS—Our Plan of Reorganization specified the total amount of consideration we would provide to all pre-petition creditors in settlement of their claims. At December 31, 2013, we had not yet completed the process of disbursing funds to settle pre-petition claims, as we had not yet completed the process of resolving all of the claims. We recorded a liability of $3.2 million at December 31, 2013 associated with these obligations and a liability of $0.7 million which is associated with discontinued operations and is reported within other current liabilities. Restricted cash of $5.1 million primarily relates to payables to pre-petition creditors and is held in accounts restricted for this purpose.
	CONTINGENT LOSSES—We record a liability for a contingent loss when it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. We record attorneys’ fees incurred in connection with a contingent loss at the time the fees are incurred. We do not record liabilities for attorneys’ fees that are expected to be incurred in the future.
	ASSET RETIREMENT OBLIGATIONS—Asset retirement obligations include legal or contractual obligations associated with the retirement of long-lived assets, such as requirements to incur costs to dispose of equipment or to remediate the environmental impacts of the normal operation of the assets. We record liabilities for asset retirement obligations when a known obligation exists under current law or contract and when a reasonable estimate of the value of the liability can be made.
	DISCONTINUED OPERATIONS—We classify a component of our business as a discontinued operation when we commit to a plan to sell the component and believe it is probable that a sale will be completed within one year. A component that is disposed of in a manner other than by sale is classified as discontinued when the component is actually disposed. Investments accounted for under the equity method, or the cost method, do not qualify for treatment as discontinued operations. A component that is disposed of may not qualify for treatment as a discontinued operation if we have significant continuing involvement in the operations of the component after the disposal.
	Once a component meets the requirements to be classified as a discontinued operation, previous financial statements are retrospectively adjusted to reflect the component as a discontinued operation for all periods presented. Income and losses of discontinued operations (excluding corporate general and administrative expense allocations) are combined into one line on the consolidated statements of operations. The cash flows from discontinued operations are not separately identified in the consolidated statements of cash flows.
	REVENUE RECOGNITION—Sales of product, as well as gathering and marketing revenues, are recognized at the time title to the product transfers to the purchaser, which typically occurs upon receipt of the product by the purchaser. Terminal and storage revenues are recognized at the time the service is performed. Revenue for the transportation of product is recognized upon delivery of the product to its destination. Certain revenue transactions are reported on a net basis, including derivative instruments considered held for trading purposes and certain buy/sell transactions (see “Purchases and Sales of Inventory with the Same Counterparty”). Other revenue primarily represents operating cost recovery from working interest owners in certain processing plants and is recorded when earned in accordance with the terms of related agreements. Taxes collected from customers and remitted to governmental authorities are recorded on a net basis (excluded from revenue).
	COSTS OF PRODUCTS SOLD—Costs of products sold consists of the cost to purchase the product, the cost to transport the product to the point of sale, and the cost to store the product until it is sold.
	PURCHASES AND SALES OF INVENTORY WITH THE SAME COUNTERPARTY—We routinely enter into transactions to purchase inventory from, and sell inventory to, the same counterparty. Such transactions that are entered into in contemplation of one another are recorded on a net basis.
	CURRENCY TRANSLATION—The consolidated financial statements are presented in U.S. dollars. Our segments operate in four countries, and each segment has identified a “functional currency,” which is the primary currency in the environment in which the segment operates. The functional currencies include the U.S. dollar, the Canadian dollar, the British pound sterling, and the Mexican peso.
	At the end of each reporting period, the assets and liabilities of each segment are translated from its functional currency to U.S. dollars using the exchange rate at the end of the month. The monthly results of operations of each segment are generally translated from its functional currency to U.S. dollars using the average exchange rate during the month. Changes in exchange rates result in currency translation gains and losses, which are recorded within other comprehensive income (loss).
	Certain segments also enter into transactions in currencies other than their functional currencies. At the end of each reporting period, each segment re-measures the related receivables, payables, and cash to its functional currency using the exchange rate at the end of the period. Changes in exchange rates between the time the transactions were entered into and the end of the reporting period result in currency transaction gains or losses, which are recorded in the consolidated statements of operations.
	INCOME TAXES—Deferred income taxes are accounted for under the liability method, which takes into account the differences between the basis of the assets and liabilities for financial reporting purposes and amounts recognized for income tax purposes. We record valuation allowances on deferred tax assets when, in the opinion of management, it is more likely than not that the asset will not be recovered.
	We monitor uncertain tax positions and we recognize tax benefits only when management believes the relevant tax positions would more likely than not be sustained upon examination. We record any interest and any penalties related to income taxes within income tax expense in the consolidated statements of operations.
	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.
	RECLASSIFICATIONS—Certain reclassifications have been made to conform prior year balances to the current year presentation.
	PENSION BENEFITS—Pension cost and obligations are actuarially determined and are affected by assumptions including expected return on plan assets, discount rates, compensation increases, and employee turnover rates. We evaluate our assumptions periodically and make adjustments to these assumptions and the recorded liability as necessary. Actuarial gains or losses are amortized on a straight-line basis over the expected remaining service life of employees in the pension plan.
	EQUITY-BASED COMPENSATION—We grant certain of our employees equity-based compensation awards which vest contingent on continued service of the recipient and, in some cases, on their achievement of specific performance targets. We record compensation expense for these outstanding awards over applicable service or performance periods based on their grant date fair value with a corresponding increase to additional paid-in capital. The expense to be recorded over the life of the awards is discounted for expected forfeitures during the vesting period.
	NONCONTROLLING INTERESTS IN CONSOLIDATED SUBSIDIARIES—Noncontrolling interests represents third-party limited partner unitholders' interests in 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.
	COMPREHENSIVE INCOME (LOSS) AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)—Comprehensive income (loss) is defined as a change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources and includes all changes in equity during a period except those resulting from investments by owners and distributions to owners. Our comprehensive income (loss) consists of currency translation adjustments, changes in the funded status of pension benefit plans and changes in the fair value of interest rate swaps.
	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 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 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.

Rose_Rock_Midstream_LP

Rose Rock Midstream, L.P.	12 Months Ended
	Dec. 31, 2013
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]	'
Rose Rock Midstream, L.P.	'
	ROSE ROCK MIDSTREAM, L.P.
	On December 14, 2011, our subsidiary Rose Rock completed an initial public offering ("IPO") in which it sold 7.0 million common units representing limited partner interests. We received proceeds of $127.1 million from this offering, net of underwriter discounts and other fees associated with the offering. We used these proceeds to make principal payments on long-term debt.
	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.
	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.
	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 approximately $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.
	On December 16, 2013, we contributed an additional 33% interest in SCPL to Rose Rock in exchange for (i) cash of approximately $173.1 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. The cash consideration was funded through a borrowing under Rose Rock's credit facility.
	As these transactions were between parties under common control, Rose Rock recorded its interest in SCPL at SemGroup's historical value and as such no gain on the sales was recognized by SemGroup. Proceeds in excess of the historical value were accounted for as a dividend from Rose Rock to SemGroup and resulted in a $180.2 million reduction to noncontrolling interests in consolidated subsidiaries and an offsetting increase to additional paid-in capital of $112.9 million (net of tax impact of $67.3 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. SemGroup used the proceeds from these transactions to pay amounts owed under its revolving credit facility.
	SemGroup incurred approximately $2.2 million of expense associated with these transactions, including expenses of Rose Rock. Rose Rock incurred approximately $4.1 million of cost, of which approximately $1.6 million of equity issuance costs were offset against proceeds, $1.6 million were related to the January 2013 borrowing and were deferred, and $0.9 million were expensed.
	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.
	At December 31, 2013, we owned the 2% general partner interest and a 51.6% limited partner interest that included 4,389,709 common units, 8,389,709 subordinated units and 2,500,000 Class A units of Rose Rock. We also own certain incentive distribution rights, which are described below. We control the operations of Rose Rock through our ownership of the general partner interest, and we continue to consolidate Rose Rock. The outside ownership interests in Rose Rock are reflected in “noncontrolling interests in consolidated subsidiaries” on our consolidated balance sheets. The portion of the net income of Rose Rock subsequent to the initial public offering that is attributable to outside owners is reflected within “net income attributable to noncontrolling interests” in our consolidated statements of operations.
	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										Marginal Percentage
		Per Unit Target Amount										Interest in Distributions
												Unitholders		General		Incentive
														Partner		Distribution
																Rights
	Minimum Quarterly Distributions								$	0.3625		98	%	2	%	—
	First Target Distribution	above		$	0.3625			up to	$	0.416875		98	%	2	%	—
	Second Target Distribution	above		$	0.416875			up to	$	0.453125		85	%	2	%	13	%
	Third Target Distribution	above		$	0.453125			up to	$	0.54375		75	%	2	%	23	%
	Thereafter							above	$	0.54375		50	%	2	%	48	%
	The following table shows the distributions paid (in thousands, except for per unit amounts):
			Record Date		Payment Date		Distribution			Distributions Paid
	Quarter Ended						Per Unit			SemGroup								Noncontrolling		Total
																		Interest		Distributions
										General		Incentive		Common		Subordinated		Common Units
										Partner		Distributions		Units		Units
	December 31, 2011	*	February 3, 2012		February 13, 2012		$	0.067	*	$	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		$	0.43		$	179	$	41	$	1,242	$	3,607	$	3,872	$	8,941
	June 30, 2013		August 5, 2013		August 14, 2013		$	0.44		$	183	$	72	$	1,271	$	3,692	$	3,962	$	9,180
	September 30, 2013		November 5, 2013		November 14, 2013		$	0.45		$	232	$	127	$	1,301	$	3,775	$	6,189	$	11,624
	December 31, 2013		February 4, 2014		February 14, 2014		$	0.465		$	257	$	244	$	2,041	$	3,901	$	6,398	$	12,841
	*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.
	Certain summarized balance sheet information of Rose Rock is shown below (in thousands):
		31-Dec-13				31-Dec-12
	Cash	$	15,459			$	108
	Other current assets	306,128				250,509
	Property, plant and equipment	311,616				291,530
	Equity method investment	224,095				—
	Goodwill	28,322				—
	Other noncurrent assets	11,627				2,579
	Total assets	$	897,247			$	544,726
	Current liabilities	$	293,031			$	231,843
	Long-term debt	245,088				4,562
	Partners’ capital attributable to SemGroup	120,610				179,187
	Partners’ capital attributable to noncontrolling interests	159,961				129,134
	Noncontrolling interest in consolidated subsidiaries retained by SemGroup	78,557				—
	Total liabilities and partners’ capital	$	897,247			$	544,726
	Certain summarized income statement information of Rose Rock for the years ended December 31, 2013, 2012, and 2011 is shown below (in thousands):
		Year Ended December 31, 2013				Year Ended December 31, 2012			Year Ended December 31, 2011
	Revenue	$	766,526			$	620,417		$	431,321
	Costs of products sold	$	663,759			$	546,966		$	366,265
	Operating, general and administrative expenses	$	51,082			$	35,385		$	28,816
	Depreciation and amortization expense	$	23,165			$	12,131		$	11,379
	Earnings from equity method investment	$	17,571			$	—		$	—
	Net income	$	38,005			$	23,954		$	23,235
	Noncontrolling interest in consolidated subsidiaries retained by SemGroup	$	1,256			$	—		$	—
	Net income attributable to Rose Rock Midstream, L.P.	$	36,749			$	23,954		$	23,235
	The results of Rose Rock included in the table above for the year ended December 31, 2011 include the activity of its predecessor prior to November 29, 2011. The predecessor included SemCrude, L.P., a wholly-owned subsidiary of SemGroup Corporation (exclusive of SemCrude’s ownership interests in SemCrude Pipeline, L.L.C., which holds a 51% ownership interest in White Cliffs, and Eaglwing, L.P. (“Eaglwing”), which is also a wholly-owned subsidiary of SemGroup Corporation).

Investments_in_NonConsolidated

Investments in Non-Consolidated Subsidiaries	12 Months Ended
	Dec. 31, 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 consolidated balance sheets. Instead, our ownership interest is reflected in one line as a noncurrent asset on our consolidated balance sheets. Our equity method investments consist of the following (in thousands):
		December 31, 2013			December 31, 2012
	White Cliffs	$	224,095		$	138,970
	NGL Energy	208,848			174,398
	Glass Mountain	132,181			74,434
	Total equity method investments	$	565,124		$	387,802
	Under the equity method, we do not report the individual revenues and expenses of our investees in our consolidated statements of operations. Instead, our interest in the earnings of our investees is reflected in one line item on our consolidated statements of operations. Our earnings from equity method investments consist of the following (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	White Cliffs	$	45,459		$	36,439		$	15,004
	NGL Energy*	7,123			(403		)	—
	Glass Mountain	(105		)	—			—
	Total earnings from equity method investments	$	52,477		$	36,036		$	15,004
	* Excluding gain on issuance of common units of $26.9 million.
	Cash distributions received from equity method investments consist of the following (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	White Cliffs	$	57,576		$	44,514		$	27,459
	NGL Energy	18,321			9,217			—
	Glass Mountain	—			—			—
	Total cash distributions received from equity method investments	$	75,897		$	53,731		$	27,459
	White Cliffs
	We account for our 51% ownership of White Cliffs under the equity method, as the other members have substantive rights to participate in its management.
	In August 2012, the members 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 members. Our funding requirement will be 51% of the total cost.  For the years ended December 31, 2013 and 2012, we contributed approximately $95.5 million and $2.3 million, respectively, for project funding and estimate our expected remaining contributions to be $53.3 million, which will be made in 2014.
	Certain summarized balance sheet information of White Cliffs is shown below (in thousands):
		December 31,			December 31,
		2013			2012
	Current assets	$	98,457		$	21,508
	Property, plant and equipment, net	312,831			210,710
	Goodwill	17,000			17,000
	Other intangible assets, net	20,802			26,369
	Total assets	$	449,090		$	275,587
	Current liabilities	$	9,648		$	3,412
	Members’ equity	439,442			272,175
	Total liabilities and members’ equity	$	449,090		$	275,587
	Certain summarized income statement information of White Cliffs for the years ended December 31, 2013, 2012 and 2011 is shown below (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Revenue	$	133,310		$	108,125		$	66,097
	Operating, general and administrative expenses	$	23,825		$	14,821		$	12,746
	Depreciation and amortization expense	$	18,668		$	19,963		$	20,842
	Net income	$	90,817		$	73,341		$	32,509
	The equity in earnings of White Cliffs for the years ended December 31, 2013, 2012 and 2011 reported in our consolidated statements of operations 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 members are not obligated to share. Such expenses are recorded by White Cliffs, and are allocated to our membership interests. White Cliffs recorded $1.8 million, $2.0 million and $3.2 million of such general and administrative expense for the years ended December 31, 2013, 2012 and 2011, respectively.
	Our membership interest in White Cliffs is significant as defined by Securities and Exchange Commission’s Regulation S-X Rule 1-02(w). Accordingly, as required by Regulation S-X Rule 3-09, we have included the audited financial statements of White Cliffs as of December 31, 2013 and 2012 and for each of the three years in the period ended December 31, 2013 as an exhibit to this Form 10-K.
	NGL Energy
	We own 9,133,409 common units representing limited partner interests in NGL Energy, which represents approximately 12.8% of the total 71,216,230 limited partner units of NGL Energy outstanding at September 30, 2013, and a 11.78% interest in the general partner of NGL Energy.
	At December 31, 2013, the fair value of our 9,133,409 common units in NGL Energy was $315 million, based on a December 31, 2013 closing price of $34.50 per common unit. This does not reflect our 11.78% 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.
	The excess of the recorded amount of our investment over the book value of our share of the underlying net assets primarily represents equity method goodwill.
	Certain unaudited summarized balance sheet information of NGL Energy is shown below (in thousands):
		(unaudited)			(unaudited)
		September 30,			September 30,
		2013			2012
	Current assets	$	1,013,859		$	736,297
	Property plant and equipment, net	631,663			425,641
	Goodwill	840,287			515,881
	Intangible and other assets, net	540,684			351,600
	Total assets	$	3,026,493		$	2,029,419
	Current liabilities	$	800,658		$	653,101
	Long-term debt	906,066			569,903
	Other noncurrent liabilities	2,673			2,599
	Partners’ equity	1,317,096			803,816
	Total liabilities and partners’ equity	$	3,026,493		$	2,029,419
	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 consolidated statements of operations and comprehensive income for the years ended December 31, 2013 and 2012, relates to the earnings of NGL Energy for the twelve months ended September 30, 2013 and 2012, prorated for the period of time we held our ownership interest in NGL Energy.
	Our limited partnership interest was diluted primarily in connection with an NGL public equity offering completed on July 5, 2013, an NGL acquisition completed August 2, 2013 and an NGL public equity offering completed on September 25, 2013. Accordingly, we recorded a non-cash gain of $26.9 million in the fourth quarter of 2013 related to these transactions, which is included in "gain on issuance of common units by equity method investee" in our consolidated statements of operations. On December 2, 2013, NGL Energy announced it completed the issuance of common units in a private placement in connection with the completion of an acquisition. As a result of this transaction, we expect to record an estimated non-cash gain of $8.1 million in the first quarter 2014.
	Certain unaudited summarized income statement information of NGL Energy for the twelve months ended September 30, 2013 and 2012 is shown below (in thousands):
	(unaudited)			(unaudited)
	Twelve Months			Twelve Months
	Ended			Ended
	September 30,			September 30,
	2013			2012
Revenue	$	5,935,715		$	2,371,524
Costs of products sold	$	5,478,361		$	2,182,263
Operating, general and administrative expenses	$	276,905		$	125,889
Depreciation and amortization expense	$	94,050		$	34,621
Net income	$	44,378		$	5,405
Our ownership interest in NGL Energy is significant as defined by Securities and Exchange Commission’s Regulation S-X Rule 1-02(w). Accordingly, as required by Regulation S-X Rule 3-09, we will amend this Form 10-K to include the audited financial statements of NGL Energy as of March 31, 2014 and 2013 and for each of the three years in the period ended March 31, 2014 as an exhibit, when available.
Glass Mountain
In April 2012, we formed a joint venture, GMP, to construct, maintain and operate a 210-mile crude oil pipeline system originating in Alva and Arnett, Oklahoma and terminating at Cushing, Oklahoma. Construction was completed in January 2014. The pipeline is operated by a subsidiary of Rose Rock. We hold a 50% interest in Glass Mountain. The owner of the remaining 50% is a related party (Note 25). As of December 31, 2013, we have invested $132.2 million in GMP, including our capital contributions, amounts paid to acquire the additional ownership percentage, and capitalized interest. We invested $57.8 million and $74.4 million in GMP for the years ended December 31, 2013 and 2012, respectively.
The excess of the recorded amount of our investment over the book value of our share of the underlying net assets represents equity method goodwill and capitalized interest of $31.0 million and $3.7 million, respectively, at December 31, 2013.
As of December 31, 2013, we expect to make additional contributions of approximately $9.5 million in 2014. We account for our investment in GMP using the equity method.
Our ownership interest in GMP is not significant as defined by Securities and Exchange Commission's Regulation S-X Rule 1-02(w). Accordingly, no audited financial statements of GMP pursuant to Regulation S-X 3-09 have been included as an exhibit to this Form 10-K.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2013
Acquisitions [Abstract]	'
Business Combination Disclosure [Text Block]	'
	.	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 $313.5 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 $300 million of 7.50% senior unsecured notes (Note 16) 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 post-acquisition capital expenditures for completion as well as additional capital related to future well connections.
	We have included MMGS in our consolidated financial statements as of August 1, 2013 in our SemGas segment. During the year ended December 31, 2013, our consolidated statements of operations and comprehensive income (loss) 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 December 31, 2013 are subject to change and such changes could be material. We expect to finalize the purchase price allocation in early 2014. During 2013, the estimated acquisition cost was adjusted related to payment of invoices for the period between the acquisition agreement and closing of the acquisition. We have preliminarily estimated the fair value of the assets acquired as follows (in thousands):
	Property, plant and equipment	$	123,316
	Customer contract intangible	166,332
	Goodwill	23,839
	Total assets acquired	$	313,487
	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.
	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 $49.0 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 consolidated financial statements as of September 1, 2013 in our Crude segment. During the year ended December 31, 2013, our consolidated statements of operations and comprehensive income (loss) 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. During 2013, the acquisition price was reduced by approximately $1.0 million due to a computer system which was ultimately not purchased.
	We have received an independent appraisal of the fair value of the assets acquired in the Barcas acquisition and have recorded the following acquisition date fair values for the assets acquired (in thousands):
	Property, plant and equipment	$	13,717
	Customer contract intangible	6,930
	Goodwill	28,322
	Total assets acquired	$	48,969
	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.
	NGL Energy
	On November 1, 2011, we acquired 8,932,031 common units representing limited partner interests in NGL Energy and a 7.5% interest in the general partner of NGL Energy. As part of this transaction, we agreed to waive our distribution rights on certain of the common units for a specified period of time. We recorded our investment in NGL Energy at the acquisition date fair value, estimated to be $184.0 million. We derived our estimate of the fair value of our limited partner interests in NGL Energy using the closing price of limited partner units on October 31, 2011, adjusted to reflect the waiver of certain distribution rights. The waiver on these distribution rights expired in September 2012.
	In conjunction with a June 2012 transaction, we received 201,378 additional common units bringing our total ownership to 9,133,409 common units representing limited partner interests in exchange for a percentage of our general partner interest. Subsequent to the transaction, we held a 6.42% interest in the general partner of NGL.
	On August 6, 2013, we completed the acquisition of approximately 5.36% of the general partner of NGL Energy, which increased our ownership of NGL Energy's general partner to 11.78%.
	Our equity method investment in NGL Energy is included in our SemStream segment. See Note 5 for additional information related to our equity method investment in NGL Energy.
	Glass Mountain
	In September 2012, we acquired an additional 25% ownership interest in GMP, bringing our total ownership percentage in GMP to 50%. See Note 5 for additional information related to our equity method investment in GMP.

Disposals_And_Impairments_of_L

Disposals And Impairments of Long-Lived Assets	12 Months Ended
	Dec. 31, 2013
Disposals And Impairments Of Long-Lived Assets [Abstract]	'
Disposals and Impairments of Long-Lived Assets	'
	DISPOSALS AND IMPAIRMENTS OF LONG-LIVED ASSETS
	Year Ended December 31, 2013
	There were no significant gains (losses) recorded during the year ended December 31, 2013 related to the disposal or impairment of long-lived assets.
	Year Ended December 31, 2012
	Gains (losses) recorded during the year ended December 31, 2012 related to the disposal or impairment of long-lived assets included the following (in thousands):
	Event	Segment		Pre-Tax Gain
	White Cliffs settlement (a)	Crude		$	3,500
	Sale of SemStream residential division assets and liabilities (b)	SemStream		$	3,090
	(a)	We sold a portion of our ownership interest in White Cliffs during September 2010. At the time, we recorded a loss of $6.8 million on disposal of that asset. In September 2012, we reached a settlement in a dispute concerning the selling price of that ownership interest and reduced the loss by $3.5 million. This $3.5 million gain is reported in "gain on disposal or impairment of long-lived assets, net" in the consolidated statements of operations and comprehensive income (loss).
	(b)	On September 12, 2012, we entered into a definitive agreement to sell the assets and liabilities of SemStream’s Arizona residential business which was subject to regulatory approval by the Arizona Corporation Commission (the "ACC"). In early December 2012, the ACC granted SemStream regulatory approval to proceed with the sale. The sale closed on December 31, 2012 and resulted in a gain of $3.1 million on a cash sales price of $12.3 million. The $3.1 million gain is reported in "income from discontinued operations, net of income taxes" in the consolidated statement of operations and comprehensive income (loss). Property, plant, and equipment with a carrying value of $9.4 million represented the majority of assets included in the sale.
	Year Ended December 31, 2011
	Gains (losses) recorded during the year ended December 31, 2011 related to the disposal or impairment of long-lived assets included the following (in thousands):
	Event	Segment		Pre-Tax Gain
				(Loss)
	Contribution of SemStream assets to NGL Energy (a)	SemStream		$	44,266
	SemStream residential division impairment (b)	SemStream		$	(8,684	)
	SemLogistics goodwill impairment (c)	SemLogistics		$	(44,663	)
	(a)	On November 1, 2011, we contributed certain assets and liabilities of our SemStream segment to NGL Energy. On that date these assets and liabilities had the net book values (in thousands) below. However, these values were subject to post closing adjustments, which have since been completed, and resulted in a $2.1 million working capital adjustment.
	Inventory	$	107,858
	Other current assets	11,263
	Property plant and equipment	47,756
	Goodwill	50,071
	Other intangible assets	12,408
	Other noncurrent assets	2,818
	Other current liabilities	(2,947		)
	Other noncurrent liabilities	(172		)
	Net assets contributed	$	229,055
	In return for this contribution, we received $93.0 million of cash and ownership interests in NGL Energy and its general partner with an estimated fair value of $184.0 million. We recorded a gain of $44.3 million on this transaction, which includes the impact of a $2.1 million working capital adjustment and the write-off of $1.6 million of software. Additionally, $2.2 million of capitalized loan fees were written-off as a result of long-term debt payments made from the proceeds of this transaction.
	(b)	We test all of our goodwill for impairment as of October 1 of each year. Upon completing this impairment test for 2011, we concluded that the goodwill and other intangible assets attributable to the Arizona residential business of our SemStream segment (which was not contributed to NGL Energy) were impaired. To calculate the impairment loss, we estimated the fair value of this reporting unit using the present value of estimated future cash flows, discounted at a rate of 9.4%, and recorded a full impairment of the $3.6 million balance of goodwill and the $5.0 million balance of other intangible assets associated with customer relationships. No impairment was recorded related to the regulated assets of the Arizona residential business in accordance with ASC 980, "Regulated Operations".
	(c)	High crude oil prices and backwardated market conditions in 2011 had a negative effect on SemLogistic’s storage economics. As a result, the demand for storage is depressed and SemLogistics has had difficulty securing contract renewals. SemLogistics successfully passed the initial 2011 goodwill impairment test. However, a review of the sensitivity of the test results indicated that a ten percent reduction in the estimated revenue in 2012 and 2013 would result in a test failure. In addition, we received notice in late January 2012 from two customers that their intentions were not to renew their storage contracts upon expiration. These notifications, coupled with the sensitivity of the test results to loss of revenue, led us to conclude that impairment of the goodwill of SemLogistics was required. Accordingly, we impaired the full amount of goodwill which was $44.7 million at October 1, 2011.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	DISCONTINUED OPERATIONS
	As described in Note 7, on November 1, 2011, we contributed the primary operating assets of our SemStream segment to NGL Energy; however, at that time we did not 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 regulatory approval by the ACC and closed on December 31, 2012 after that approval was granted; therefore, the operations of SemStream's Arizona residential business are classified as discontinued. The sale resulted in a gain of $3.1 million. There continues to be an insignificant amount of activity related to ongoing bankruptcy matters which is reflected in the results below and is related to operations discontinued during bankruptcy.
	Certain summarized information on the results of discontinued operations is shown below (in thousands):
		Year Ended December 31, 2013		Year Ended December 31, 2012			Year Ended December 31, 2011
	External revenue	$	—	$	13,518		$	14,264
	Gain (loss) on disposal of long-lived assets, net	$	—	$	3,090		$	(9,196	)
	Income (loss) from discontinued operations before income taxes	$	59	$	2,935		$	(9,652	)
	Income tax expense (benefit)	—		(4		)	(104		)
	Income (loss) from discontinued operations, net of income taxes	$	59	$	2,939		$	(9,548	)

Segments

Segments	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segments	'
	SEGMENTS
	As described in Note 1, 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 Rose Rock, White Cliffs and Glass Mountain, which have been included within the Crude segment and were aggregated based on similarity of operations, customer base and other considerations. Our investment in NGL Energy is represented by our 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 were allocated to the segments, based on our allocation policies in effect at the time.
		Year Ended December 31, 2013
		Crude			SemStream			SemCAMS			SemGas			SemLogistics			SemMexico			Corporate			Consolidated
																				and
																				Other
		(in thousands)
	Revenues:
	External	$	767,202		$	—		$	198,450		$	207,134		$	11,671		$	242,559		$	—		$	1,427,016
	Intersegment	—			—			—			23,985			—			—			(23,985		)	—
	Total revenues	767,202			—			198,450			231,119			11,671			242,559			(23,985		)	1,427,016
	Expenses:
	Costs of products sold, exclusive of depreciation and amortization shown below	663,759			—			305			169,800			380			209,841			(23,985		)	1,020,100
	Operating	36,242			1			150,319			20,200			7,444			9,379			—			223,585
	General and administrative	16,766			600			14,940			7,971			5,854			10,700			21,766			78,597
	Depreciation and amortization	23,708			—			10,766			14,517			9,426			5,991			2,001			66,409
	Loss (gain) on disposal or impairment of long-lived assets, net	(56		)	6			—			665			—			(854		)	—			(239		)
	Total expenses	740,419			607			176,330			213,153			23,104			235,057			(218		)	1,388,452
	Earnings from equity method investments	45,354			7,123			—			—			—			—			—			52,477
	Gain on issuance of common units by equity method investee	—			26,873			—			—			—			—			—			26,873
	Operating income (loss)	72,137			33,389			22,120			17,966			(11,433		)	7,502			(23,767		)	117,914
	Other expenses (income), net
	Interest expense (income)	14,923			(4,810		)	18,928			3,268			1,435			188			(8,790		)	25,142
	Other expense (income), net	(14		)	128			(20		)	(3		)	(400		)	(652		)	45,234			44,273
	Total other expenses (income)	14,909			(4,682		)	18,908			3,265			1,035			(464		)	36,444			69,415
	Income (loss) from continuing operations before income taxes	$	57,228		$	38,071		$	3,212		$	14,701		$	(12,468	)	$	7,966		$	(60,211	)	$	48,499
	Additions to long-lived assets	$	66,995		$	—		$	56,122		$	97,021		$	2,071		$	6,375		$	734		$	229,318
	Total assets at December 31, 2013 (excluding intersegment receivables)	$	1,070,484		$	208,847		$	306,001		$	552,095		$	168,835		$	104,154		$	60,198		$	2,470,614
	Equity investments at December 31, 2013	$	356,276		$	208,848		$	—		$	—		$	—		$	—		$	—		$	565,124
		Year Ended December 31, 2012
		Crude			SemStream			SemCAMS			SemGas			SemLogistics			SemMexico			Corporate			Consolidated
																				and
																				Other
		(in thousands)
	Revenues:
	External	$	620,797		$	7		$	223,219		$	117,264		$	12,341		$	263,870		$	(1	)	$	1,237,497
	Intersegment	—			—			—			10,606			—			—			(10,606		)	—
	Total revenues	620,797			7			223,219			127,870			12,341			263,870			(10,607		)	1,237,497
	Expenses:
	Costs of products sold, exclusive of depreciation and amortization shown below	546,966			33			768			100,677			196			236,851			(10,606		)	874,885
	Operating	24,143			(37		)	174,284			12,712			5,921			7,677			—			224,700
	General and administrative	13,321			930			14,020			6,195			5,652			9,433			22,367			71,918
	Depreciation and amortization	12,131			—			10,589			7,043			9,780			6,171			2,496			48,210
	Loss (gain) on disposal or impairment of long-lived assets, net	(3,501		)	214			—			46			—			(290		)	—			(3,531		)
	Total expenses	593,060			1,140			199,661			126,673			21,549			259,842			14,257			1,216,182
	Earnings from equity method investments	36,439			(403		)	—			—			—			—			—			36,036
	Operating income (loss)	64,176			(1,536		)	23,558			1,197			(9,208		)	4,028			(24,864		)	57,351
	Other expenses (income), net
	Interest expense (income)	(409		)	(3,449		)	18,727			1,461			2,486			314			(10,228		)	8,902
	Other expense (income), net	31			(21		)	14			—			(420		)	(38		)	22,003			21,569
	Total other expenses (income)	(378		)	(3,470		)	18,741			1,461			2,066			276			11,775			30,471
	Income (loss) from continuing operations before income taxes	$	64,554		$	1,934		$	4,817		$	(264	)	$	(11,274	)	$	3,752		$	(36,639	)	$	26,880
	Additions to long-lived assets	$	41,364		$	—		$	13,340		$	47,140		$	1,188		$	3,396		$	14,827		$	121,255
	Total assets at December 31, 2012 (excluding intersegment receivables)	$	771,140		$	175,028		$	302,143		$	133,864		$	174,218		$	94,594		$	97,192		$	1,748,179
	Equity investments at December 31, 2012	$	213,404		$	174,398		$	—		$	—		$	—		$	—		$	—		$	387,802
		Year Ended December 31, 2011
		Crude			SemStream			SemCAMS			SemGas			SemLogistics			SemMexico			Corporate			Consolidated
																				and
																				Other
		(in thousands)
	Revenues:
	External	$	431,321		$	561,596		$	163,367		$	66,660		$	23,314		$	218,187		$	801		$	1,465,246
Intersegment	—			46,738			—			38,588			—			—			(85,326		)	—
Total revenues	431,321			608,334			163,367			105,248			23,314			218,187			(84,525		)	1,465,246
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	366,265			595,434			218			75,066			152			192,068			(84,764		)	1,144,439
Operating	17,470			6,448			110,814			9,027			6,206			5,006			70			155,041
General and administrative	9,757			7,336			16,816			6,521			6,712			11,560			16,745			75,447
Depreciation and amortization	11,379			3,501			10,233			5,986			9,271			6,502			2,951			49,823
Loss (gain) on disposal or impairment of long-lived assets, net	64			(45,821		)	(8		)	4			44,663			(200		)	1,599			301
Total expenses	404,935			566,898			138,073			96,604			67,004			214,936			(63,399		)	1,425,051
Earnings from equity method investments	15,004			—			—			—			—			—			—			15,004
Operating income (loss)	41,390			41,436			25,294			8,644			(43,690		)	3,251			(21,126		)	55,199
Other expenses (income):
Interest expense	3,749			17,152			24,685			2,346			1,005			365			10,836			60,138
Other expense (income), net	(1,600		)	(2,112		)	(2,811		)	(10		)	46			(173		)	(8,329		)	(14,989		)
Total other expenses	2,149			15,040			21,874			2,336			1,051			192			2,507			45,149
Income (loss) from continuing operations before income taxes	$	39,241		$	26,396		$	3,420		$	6,308		$	(44,741	)	$	3,059		$	(23,633	)	$	10,050
Additions to long-lived assets	$	32,397		$	2,197		$	4,874		$	14,952		$	5,313		$	4,667		$	2,080		$	66,480
Income tax expense (benefit) relates to the following segments (in thousands):
	Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
SemCAMS	$	6,348		$	720		$	552
SemLogistics	(5,699		)	(7,736		)	(3,331		)
SemMexico	2,589			2,285			629
Corporate and other	(20,492		)	2,653			(160		)
Total	$	(17,254	)	$	(2,078	)	$	(2,310	)

Inventories

Inventories	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	INVENTORIES
	Inventories consist of the following (in thousands):
		December 31,		December 31,
		2013		2012
	Crude oil	$	30,779	$	24,840
	Asphalt and other	13,516		9,593
	Total inventories	$	44,295	$	34,433

Other_Assets

Other Assets	12 Months Ended
	Dec. 31, 2013
Other Assets [Abstract]	'
Other Assets	'
		OTHER ASSETS
	Other current assets consist of the following (in thousands):
		December 31,			December 31,
		2013			2012
	Product prepayments	$	779		$	1,550
	Other prepaid expenses	4,917			13,593
	Margin deposits	838			1,850
	Deferred tax asset	7,325			875
	Other	152			648
	Total other current assets	$	14,011		$	18,516
	Other noncurrent assets consist of the following (in thousands):
		December 31,			December 31,
		2013			2012
	Debt issuance costs, net	$	17,149	*	$	4,945	*
	Deferred tax asset	2,832			—
	Other	8,908			3,236
	Total other noncurrent assets, net	$	28,889		$	8,181
	* See Note 16 for discussion of debt issuance costs.

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment	'
		PROPERTY, PLANT AND EQUIPMENT
	Property, plant and equipment consists of the following (in thousands):
		December 31,			December 31,
		2013			2012
	Land	$	72,484		$	53,491
	Pipelines and related facilities	312,730			206,345
	Storage and terminal facilities	281,819			268,738
	Natural gas gathering and processing facilities	347,962			280,750
	Linefill	14,701			13,158
	Office and other property and equipment	65,679			47,679
	Construction-in-progress	199,073			75,449
	Property, plant and equipment, gross	1,294,448			945,610
	Accumulated depreciation	(188,720		)	(130,886		)
	Property, plant and equipment, net	$	1,105,728		$	814,724
	We recorded depreciation expense of $60.4 million, $46.2 million and $45.9 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	We include within the cost of property, plant and equipment interest costs incurred while an asset is being constructed. We capitalized $4.3 million and $0.8 million of interest costs during the years ended December 31, 2013 and 2012, respectively.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2013
Goodwill And Other Intangible Assets [Abstract]	'
Goodwill and Other Intangible Assets	'
	GOODWILL AND OTHER INTANGIBLE ASSETS
	Goodwill
	Goodwill relates to the following segment (in thousands):
		December 31,			December 31,
		2013			2012
	Crude	$	28,322		$	—
	SemGas	23,839			—
	SemMexico	9,860			9,884
	Total Goodwill	$	62,021		$	9,884
	In addition to the amounts in the table above, approximately $82.2 million of our investment in NGL Energy, $8.7 million of our investment in White Cliffs and $31.0 million of our investment in GMP represent equity method goodwill. Equity method goodwill is not amortized and is tested for impairment with the equity method investment in accordance with ASC 323.
	As described in Note 3, we test goodwill for impairment annually, or more often if circumstances warrant. To perform these tests, we must determine which asset groups the goodwill relates to (such asset groups are referred to as reporting units). SemMexico represents a separate reporting unit. To estimate the fair value of our SemMexico reporting unit, we used two generally accepted valuation approaches, an income approach and a market approach, using assumptions consistent with a market participant’s perspective. Under the income approach, we use a discounted cash flow analysis to determine the estimated fair value of our SemMexico reporting unit. Significant judgments and assumptions including the discount rate, anticipated revenue growth rate and gross margins, estimated operating and interest expense, and capital expenditures are inherent in these fair value estimates, which are based on our operating and capital budgets as well as strategic plans. A significant underlying assumption in our strategic plan is that the Mexican government will continue current spending levels for the maintenance and construction of its national road infrastructure (requiring asphalt). If current spending levels by the Mexican government decreased, the impact would negatively affect our key assumptions and could trigger an impairment. At October 1, 2013, fair value exceeded carrying value by 11.7%.
	Under the market approach, we apply multiples to forecasted cash flows from certain guideline public companies in our industry.
	For the October 1, 2013 goodwill impairment tests, we developed estimates of cash flows for SemMexico for a period of 18 years, and also developed an estimated terminal value using an assumed 3% growth rate. We discounted the estimated cash flows to present value using a discount rate of 13.0% for SemMexico.
	No impairments were indicated for the recently acquired Crude and SemGas goodwill (Note 6).
	Changes in goodwill balances during the period from December 31, 2010 to December 31, 2013 are shown below (in thousands):
	Balance, December 31, 2010	$	107,823
	Impairments (Note 7)	(47,804		)
	Contribution of SemStream assets to NGL Energy (Note 7)	(50,071		)
	Currency translation adjustments	(495		)
	Balance, December 31, 2011	9,453
	Currency translation adjustments	431
	Balance, December 31, 2012	9,884
	Barcas acquisition (Note 6)	28,322
	MMGS acquisition (Note 6)	23,839
	Currency translation adjustments	(24		)
	Balance, December 31, 2013	$	62,021
	For U.S. federal income tax purposes, goodwill is amortized on a straight-line basis over 15 years.
	Other intangible assets
	Other intangible assets relate to the following segments (in thousands):
		December 31,			December 31,
		2013			2012
	Crude	$	5,775		$	—
	SemGas	163,144			—
	SemMexico	5,888			7,549
	Corporate and other	31			36
	Total other intangible assets	$	174,838		$	7,585
	Changes in other intangible asset balances are shown below (in thousands):
	Balance, December 31, 2010	$	32,264
	Amortization	(4,664		)
	Impairment (Note 7)	(5,048		)
	Contribution of SemStream assets to NGL Energy (Note 7)	(12,408		)
	Currency translation adjustments	(1,194		)
	Balance, December 31, 2011	8,950
	Amortization	(2,017		)
	Currency translation adjustments	652
	Balance, December 31, 2012	7,585
	Amortization	(6,018		)
	Barcas acquisition (Note 6)	6,930
	MMGS acquisition (Note 6)	166,332
	Currency translation adjustments	9
	Balance, December 31, 2013	$	174,838
	Our other intangible assets consist primarily of customer relationships at our Crude, SemGas and SemMexico segments and unpatented technology of our SemMexico segment, which represented $172.8 million and $1.8 million, respectively, of the balance at December 31, 2013. These assets may be subject to impairments in the future if we are unable to maintain the relationships with the customers to which the assets relate.
	We recorded a $6.9 million customer contract intangible asset related to the Barcas acquisition. The intangible is being amortized on a straight-line basis over 24 months. We recorded a $166.3 million customer contract intangible asset related to the MMGS acquisition. The intangible is being amortized on a straight-line basis over 20 years.
	We estimate that future amortization of other intangible assets will be as follows (in thousands):
	For year ending:
	31-Dec-14	$	13,113
	31-Dec-15	11,687
	31-Dec-16	9,164
	31-Dec-17	8,996
	December 31, 2018	8,863
	Thereafter	123,015
	Total estimated amortization expense	$	174,838

Financial_Instruments_and_Conc

Financial Instruments and Concentrations of Risk	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Financial Instruments and Concentrations of Risk	'
	FINANCIAL INSTRUMENTS AND CONCENTRATIONS OF RISK
	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 December 31, 2013 and 2012 (in thousands):
		December 31, 2013												December 31, 2012
		Level 1				Netting*				Total				Level 1			Netting*			Total
	Assets:
	Commodity derivatives	$	36			$	(36	)		$	—			$	22		$	(22	)	$	—
	Total assets	$	36			$	(36	)		$	—			$	22		$	(22	)	$	—
	Liabilities:
	Commodity derivatives	$	96			$	(36	)		$	60			$	1,056		$	(22	)	$	1,034
	Warrants	58,134				—				58,134				32,858			—			32,858
	Total liabilities	$	58,230			$	(36	)		$	58,194			$	33,914		$	(22	)	$	33,892
	Net assets (liabilities) at fair value	$	(58,194	)		$	—			$	(58,194	)		$	(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 are based on inputs consisting of unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. These include commodity futures contracts that are traded on an exchange. These also include common stock warrants (Note 18) which are traded on the New York Stock Exchange.
	“Level 2” measurements are based on inputs consisting of market observable and corroborated prices for similar commodity derivative contracts. Assets and liabilities classified as Level 2 include over-the-counter ("OTC") traded forwards contracts and swaps.
	“Level 3” measurements were obtained using information from a pricing service and internal valuation models incorporating observable and unobservable market data. These include commodity derivatives, such as forwards and swaps for which there is not a highly liquid market, and therefore are not included in Level 2 above. Level 3 measurements also included common stock warrants until September 2011, when the warrants began to be traded on the New York Stock Exchange. Prior to that point, we used a Black-Scholes pricing model to estimate the fair value of the warrants.
	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.
	The following table summarizes changes in the fair value of our net financial assets (liabilities) classified as Level 3 in the fair value hierarchy (in thousands):
		Year Ended December 31, 2013												Year Ended December 31, 2012									Year Ended December 31, 2011
		Warrants				Commodity				Total				Warrants			Commodity			Total			Warrants			Commodity			Total
						Derivatives											Derivatives									Derivatives
	Net assets (liabilities)—beginning balance	$	—			$	—			$	—			$	—		$	—		$	—		$	(17,192	)	$	(547	)	$	(17,739	)
	Transfers out of Level 3(*)	—				—				—				—			—			—			8,934			(419		)	8,515
	Total realized and unrealized gain (loss) included in earnings(**)	—				—				—				—			—			—			8,258			2,783			11,041
	Settlements	—				—				—				—			—			—			—			(1,817		)	(1,817		)
	Net assets (liabilities)—ending balance	$	—			$	—			$	—			$	—		$	—		$	—		$	—		$	—		$	—
	Amount of total gain or loss included in earnings for the period attributable to the change in unrealized gain or loss relating to assets and liabilities still held at the reporting date	$	—			$	—			$	—			$	—		$	—		$	—		$	—		$	—		$	—
	(*)	In these tables, transfers in and transfers out are recognized as of the beginning of the reporting period for commodity derivatives and as of the transfer date for warrants.
	(**)	Gains and losses related to commodity derivatives are reported in product revenue. Gains and losses related to warrants are recorded in other expense (income).
	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 crude oil to create back-to-back transactions that are intended to lock in positive margins based on the timing, location or quality of the crude oil purchased and delivered or (ii) derivative contracts. Our storage and transportation assets also can 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.
	We contributed the primary operating assets of SemStream to NGL Energy on November 1, 2011, including all of SemStream’s commodity derivatives. Prior to November 1, 2011, SemStream managed commodity price risk by limiting its net open positions subject to outright price risk and basis risk resulting from grade, location or time differences. SemStream did so by selling and purchasing similar quantities of natural gas liquids with purchase and sale transactions for current or future delivery, by entering into future delivery and purchase obligations with futures contracts or other commodity derivatives and employing its storage and transportation assets. SemStream at times hedged its natural gas liquids commodity price exposure with derivatives on commodities other than natural gas liquids due to the limited size of the market for natural gas liquids derivatives. In addition, physical transaction sale and purchase strategies were intended to lock in positive margins for SemStream, e.g., the sales price was sufficient to cover purchase costs, any other fixed and variable costs and SemStream’s profit. All marketing activities were subject to our risk management policy, which establishes limits 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—Over the counter 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—Over the counter contracts to buy or sell a commodity at an agreed upon future date. The buyer and seller agree on specific terms (price, quantity, delivery period, and location) and conditions at the inception of the contract.
	The following table sets forth the notional quantities for derivative instruments entered into (in thousands of barrels):
		Year Ended December 31, 2013			Year Ended December 31, 2012
	Sales	2,595			1,743
	Purchases	2,575			1,636
	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 consolidated balance sheets in other current assets and other current liabilities in the following amounts (in thousands):
	December 31, 2013								December 31, 2012
	Other Current Assets				Other Current Liabilities				Other Current Assets				Other Current Liabilities
	$	—			$	60			$	—			$	1,034
	We have posted margin deposits as collateral with brokers who have the right of set off associated with these funds. Our margin deposit balance was $0.8 million and $1.9 million at December 31, 2013 and 2012, respectively. These margin account balances have not been offset against our net commodity derivative instrument (contract) positions. Had these margin account balances been netted against our net commodity derivative instrument (contract) positions as of December 31, 2013 and 2012, we would have had net asset positions of $0.8 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):
	Year Ended December 31, 2013				Year Ended December 31, 2012				Year Ended December 31, 2011
	$	(1,593	)		$	149			$	2,153
	Interest rate swaps
	During February 2011, we entered into interest rate swaps in connection with certain SemLogistics credit facilities. For 2011, the swaps were recorded at fair value in other noncurrent liabilities on the consolidated balance sheet, with changes in the fair value (net of income taxes) recorded to other comprehensive income (loss). The swaps were terminated in March 2012 with a loss on closure of $0.4 million, including a reclass of $0.3 million from accumulated other comprehensive income to earnings.
	Concentrations of risk
	During the year ended December 31, 2013, one customer of our Crude segment accounted for more than 10% of our consolidated revenue at approximately 17%. At December 31, 2013, one customer of our Crude segment accounted for approximately 16% of our consolidated accounts receivable.
	During the year ended December 31, 2012, no individual customer accounted for more than 10% of our consolidated revenue. At December 31, 2012, one customer of the Crude segment accounted for approximately 16% of our consolidated accounts receivable.
	During the year ended December 31, 2011, no individual customer accounted for more than 10% of our consolidated revenue.
	Assets and liabilities of subsidiaries outside the United States
	The following table summarizes the assets and liabilities (excluding affiliate balances) at December 31, 2013 of our subsidiaries outside the United States (in thousands):
		Canada				United				Mexico				Total
						Kingdom
	Cash and cash equivalents	$	49,221			$	1,845			$	11,862			$	62,928
	Other current assets	59,472				2,896				45,751				108,119
	Noncurrent assets	212,567				164,094				46,541				423,202
Total assets	$	321,260			$	168,835			$	104,154			$	594,249
Current liabilities	$	51,124			$	1,788			$	27,450			$	80,362
Noncurrent liabilities	70,392				21,826				1,865				94,083
Total liabilities	121,516				23,614				29,315				174,445
Net assets	$	199,744			$	145,221			$	74,839			$	419,804
Employees
At December 31, 2013, we had approximately 890 employees, including approximately 500 employees outside the U.S. Approximately 110 of the employees in Canada and Mexico are represented by labor unions and are subject to collective bargaining agreements governing their employment with us. Of these employees, approximately 60 are subject to collective bargaining agreements that renew annually and 50 have collective bargaining agreements that expire in January 2016. We have never had a labor related work stoppage and believe our employee relations are good.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	Income tax expense (benefit)
	Our consolidated income from continuing operations before income taxes was generated in the following jurisdictions (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	U.S.	$	40,002		$	21,498		$	39,936
	Foreign	8,497			5,382			(29,886		)
	Consolidated	$	48,499		$	26,880		$	10,050
	The following table summarizes income tax benefit from continuing operations by jurisdiction (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Current income tax provision:
	Foreign	$	15,546		$	9,662		$	7,427
	U.S. federal	2,067			—			—
	U.S. state	1,435			74			4
		19,048			9,736			7,431
	Deferred income tax provision (benefit):
	Foreign	(10,222		)	(12,070		)	(7,252		)
	U.S. federal	(23,756		)	222			(2,159		)
	U.S. state	(2,324		)	34			(330		)
		(36,302		)	(11,814		)	(9,741		)
	Benefit for income taxes	$	(17,254	)	$	(2,078	)	$	(2,310	)
	The following table reconciles income tax benefit at the U.S. federal statutory rate to the consolidated benefit for income taxes (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Income from continuing operations before income taxes	$	48,499		$	26,880		$	10,050
	U.S. federal statutory rate	35		%	35		%	35		%
	Provision at statutory rate	16,975			9,408			3,518
	State income taxes—net of federal benefit	(577		)	71			(221		)
	Effect of rates other than statutory	(1,041		)	(829		)	(1,360		)
	Effect of U.S. taxation on foreign branches	2,974			1,883			(10,460		)
	Foreign tax adjustment, prior years	4,533			—			—
	Impairment of goodwill	—			—			15,745
	Warrants	24,625			—			—
	Noncontrolling interest	(6,096		)	(3,429		)	—
	Foreign tax credit and offset to branch deferreds	(2,876		)	(12,360		)	9,339
	Impact of valuation allowance on deferred tax assets	(53,218		)	6,233			(16,421		)
	Other, net	(2,553		)	(3,055		)	(2,450		)
	Benefit for income taxes	$	(17,254	)	$	(2,078	)	$	(2,310	)
	For the years ended December 31, 2013, 2012, and 2011, the foreign subsidiaries are disregarded entities for U.S. federal income tax purposes. The foreign earnings are taxed in foreign jurisdictions as well as in the U.S. Foreign tax credits, subject to limitations, are available to reduce U.S. taxes.
	Deferred tax positions
	Deferred income taxes reflect the effects of temporary differences between the amounts of assets and liabilities recognized for financial reporting purposes and the amounts recognized for income tax purposes. Significant components of deferred tax assets and liabilities are as follows at December 31, 2013 and 2012 (in thousands):
		December 31,			December 31,
		2013			2012
	Deferred tax assets:
	Net operating loss and other credit carryforwards	$	9,498		$	47,910
	Compensation and benefits	7,991			1,573
	Inventories	118			96
	Intangible assets	44,444			52,444
	Pension plan	2,849			3,384
	Allowance for doubtful accounts	2,140			2,507
	Deferred revenue	5,910			3,925
	Foreign tax credit and offset to branch deferreds	95,435			92,559
	Other	8,243			16,046
	less: valuation allowance	(95,438		)	(155,757		)
	Net deferred tax assets	81,190			64,687
	Deferred tax liabilities:
	Intangible assets	(6,927		)	(8,952		)
	Prepaid expenses	(153		)	(150		)
	Property, plant and equipment	(113,030		)	(78,413		)
	Equity investment in partnerships	(49,720		)	(36,749		)
	Other	(1,471		)	(5,876		)
	Total deferred tax liabilities	(171,301		)	(130,140		)
	Net deferred tax liabilities	$	(90,111	)	$	(65,453	)
	At December 31, 2013, we had a cumulative U.S. federal net operating loss of approximately $10.9 million that can be carried forward to apply against taxable income generated in future years. This carry forward begins to expire in 2031. We had cumulative U.S. state net operating losses of approximately $40.0 million available for carryforward, which begin to expire in 2014. We had a foreign net operating loss of $16.1 million available for indefinite carry forward. We had foreign tax credits of approximately $44.6 million available for carry forward, which begin to expire in 2020.

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	LONG-TERM DEBT
	Our long-term debt consisted of the following (in thousands):
		December 31,		December 31,
		2013		2012
	SemGroup 7.50% senior unsecured notes	$	300,000	$	—
	SemGroup corporate revolving credit facility	70,000		201,500
	Rose Rock credit facility	245,000		4,500
	SemLogistics credit facility	—		—
	SemMexico credit facility	—		—
	Capital leases	125		86
	Total long-term debt	615,125		206,086
	less: current portion of long-term debt	37		24
	Noncurrent portion of long-term debt	$	615,088	$	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., 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 underwriters' fees. 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		105.62%
	2017		103.75%
	2018		101.88%
	2019 and thereafter		100.00%
	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.
	In accordance with a Registration Rights Agreement, in December 2013 the Company filed a registration statement with the SEC, which was declared effective by the SEC on January 2, 2014, so that holders of the Notes could 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. An exchange offer was commenced on January 3, 2014 and expired on February 4, 2014. All of the Notes were exchanged. The guarantees of the Exchange Notes are full and unconditional and constitute the joint and several obligations of the Guarantors.
	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 year ended December 31, 2013, we incurred $12.7 million of interest expense related to the Notes including the amortization of debt issuance costs. At December 31, 2013, we had $6.2 million of unamortized debt issuance costs related to the Notes included in other noncurrent assets on our consolidated balance sheet.
	At December 31, 2013, we were in compliance with the terms of the Notes.
	SemGroup corporate credit agreement
	Our revolving credit facility has a capacity of $500 million at December 31, 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 December 31, 2013, we had outstanding cash borrowings of $70.0 million on this facility and outstanding letters of credit of $4.0 million. During 2013, the credit agreement was amended to (i) permit the increase of the revolving commitments under the credit agreement by an aggregate amount of $300 million subject to the satisfaction of certain conditions, (ii) extend the availability period of the revolving commitments, and the maturity date of the extensions of credit thereunder, to December 11, 2018, (iii) reduce the interest rate payable in respect of the revolving and term commitments and (iv) modify the commitment fees payable in respect of revolving commitments. Earlier principal payments may be required if we enter into certain transactions to sell assets or obtain new borrowings. We have the right to make additional principal payments without incurring any penalties for early repayment.
	Interest on revolving credit cash borrowings is charged at either a Eurodollar rate or an alternate base rate ("ABR"), at our election. The Eurodollar rate is calculated as:
	•	the London Interbank Offered Rate (“LIBOR”) for U.S. dollar deposits adjusted for currency requirements; plus
	•	a margin that can range from 2.0% to 3.25%, depending on a leverage ratio specified in the agreement.
	The ABR is calculated as:
	•	the greater of i) the U.S. Prime Rate, ii) the Federal Funds Effective Rate plus 0.5%, or iii) one-month LIBOR plus 1%; plus
	•	a margin that can range from 1.0% to 2.25%, depending on a leverage ratio specified in the agreement.
	At December 31, 2013, there was $70.0 million of outstanding revolving cash borrowings of which $30.0 million incurred interest at the ABR and $40.0 million incurred interest at the Eurodollar rate. The interest rate in effect at December 31, 2013 on the $30.0 million of alternate base rate borrowings was 4.75%, calculated as the prime rate of 3.25% plus a margin of 1.5%. The interest rate in effect at December 31, 2013 on the $40 million of Eurodollar rate borrowings was 2.66%, calculated as the LIBOR of 0.16% plus a margin of 2.5%.
	At each interest payment date, we have the option of electing whether interest will be charged at the Eurodollar rate or at the ABR for the following interest period. If we elect the ABR, the following interest payment date will be at the end of the calendar quarter. If we elect the Eurodollar rate, we may elect for the next interest payment date to occur after one, two, three, or six months, or any other period acceptable to the lenders.
	Fees are charged on any outstanding letters of credit at a rate that ranges from 2.0% to 3.25%, depending on a leverage ratio specified in the credit agreement. At December 31, 2013, the rate in effect was 2.5%. In addition, a fronting fee of 0.25% is charged on outstanding letters of credit. A commitment fee that ranges from 0.375% to 0.5%, depending on a leverage ratio defined in the credit agreement, is charged on any unused capacity on the revolving credit facility. In addition, we are charged an annual administrative fee of $0.1 million. At December 31, 2013, we had unamortized capitalized loan fees of $6.2 million net of accumulated amortization, which was recorded in other noncurrent assets and is being amortized over the life of the agreement.
	We recorded interest expense related to the revolving credit facility of $7.7 million, $6.9 million and $2.8 million for the years ended December 31, 2013, 2012 and 2011, respectively, including amortization of capitalized loan fees.
	The credit agreement includes customary affirmative and negative covenants, including limitations on the creation of new indebtedness, liens, sale and lease-back transactions, new investments, making fundamental changes including mergers and consolidations, making of dividends and other distributions, making material changes in our business, modifying certain documents and maintenance of a consolidated leverage ratio and an interest coverage ratio. In addition, the credit agreement prohibits any commodity transactions that are not permitted by our comprehensive risk management policy.
	The credit agreement includes customary events of default, including events of default relating to non-payment of principal and other amounts owing under the credit agreement from time to time, including in respect of letter of credit disbursement obligations, inaccuracy of representations and warranties in any material respect when made or when deemed made, violation of covenants, cross payment-defaults to any material indebtedness, cross acceleration to any material indebtedness, bankruptcy and insolvency events, the occurrence of a change of control, certain unsatisfied judgments, certain ERISA events, certain environmental matters and certain assertions of or actual invalidity of certain loan documents. A default under the credit agreement would permit the participating banks to terminate commitments, require immediate repayment of any outstanding loans with interest and any unpaid accrued fees, and require the cash collateralization of outstanding letter of credit obligations.
	The terms of our current credit facility restrict, to some extent, the payment of cash dividends on our common stock. The credit agreement is guaranteed by all of our material domestic subsidiaries (except for Rose Rock and its general partner and subsidiaries) and secured by a lien on substantially all of our property and assets, subject to customary exceptions.
	At December 31, 2013, we were in compliance with the terms of the credit agreement.
	Previous SemGroup Corporation term loan and revolving credit facilities
	Pursuant to the Plan of Reorganization, on November 30, 2009, we entered into a revolving credit facility and a term loan. We retired these facilities in June 2011 upon entering into a new credit agreement (described above). The revolving credit facility included capacity for cash borrowings and letters of credit.
	We paid $27 million in fees to the lenders at the inception of the agreement, which we recorded in other noncurrent assets and amortized over the life of the agreement.
	Interest on revolving cash borrowings was charged at a floating rate, which was calculated as 5.5% plus whichever of the following yielded the highest rate: a) the Federal Funds Effective Rate plus 0.5%; b) the Prime Rate; c) the three-month LIBOR rate plus 1.5%, or d) 2.5%. In addition, a facility fee of $0.4 million was charged each year.
	The facility included a fee that was payable at maturity. Interest was charged on this fee at a floating rate, which was calculated as 7.0% plus the greater of LIBOR or 1.5%.
	Certain of the letters of credit were prefunded. Fees were charged on this prefunded tranche at a range of 7.0% to 8.5%. Fees on additional outstanding letters of credit were charged at a rate of 7.0%.
	Fees ranging from 1.5% to 2.5% were charged on any lender commitments that we did not utilize.
	Interest was charged on the term loan at a rate of 9%. We had the option under certain circumstances to defer interest on the term loan; when we selected this option, interest was charged during that period at a rate of 11%.
	We recorded interest expense related to these facilities of $39.3 million during the year ended December 31, 2011. These facilities were retired in 2011, as described above. Included in interest expense was the amortization of debt issuance costs of $22.2 million for the year ended December 31, 2011, which included a $17.4 million write-down due to the refinancing of the credit facility.
	Rose Rock credit facility
	On November 10, 2011, our subsidiary Rose Rock entered into a senior secured revolving credit facility agreement. This credit facility became effective upon completion of the Rose Rock IPO on December 14, 2011. Subsequent to amendments in 2013, this credit agreement provides for a revolving credit facility of $585 million and includes a $150 million sub-limit for letters of credit. 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.
	At Rose Rock’s option, amounts borrowed under the credit agreement will bear interest at either the Eurodollar rate or an 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. At December 31, 2013, we had outstanding cash borrowings of $245.0 million which incurred interest at the ABR plus an applicable margin. The interest rate at December 31, 2013 was 1.92%.
	Fees are charged on any outstanding letters of credit at a rate that ranges from 1.75% to 3.00%, depending on a leverage ratio specified in the credit agreement. At December 31, 2013, there were $34.5 million in outstanding letters of credit, and the rate in effect was 1.75%. 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. In addition, we are charged an annual administrative fee of $0.1 million. The credit facility also allows for the use of Secured Bilateral Letters of Credit, which are issued external to the credit facility and do not reduce revolver availability. At December 31, 2013, we had $61.3 million of Bilateral Letters of Credit outstanding and the interest rate in effect was 1.75%.
	At December 31, 2013, we had $4.8 million in capitalized loan fees, net of accumulated amortization, which is recorded in other noncurrent assets and is being amortized over the life of the agreement.
We recorded interest expense related to this facility of $7.2 million, $1.9 million and $0.1 million for the years ended December 31, 2013, 2012 and 2011, respectively, including amortization of debt issuance costs.
The credit agreement includes customary representations and warranties and affirmative and negative covenants. The covenants in the agreement include limitations on creation of new indebtedness and liens, entry into sale and lease-back transactions, investments, and fundamental changes including mergers and consolidations, dividends and other distributions, material changes in Rose Rock’s business and modifying certain documents. In addition, the agreement prohibits any commodity transactions that are not permitted by Rose Rock’s comprehensive risk management policy.
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 agreement includes customary events of default, including events of default relating to non-payment of principal and other amounts owing under the agreement from time to time, including in respect of letter of credit disbursement obligations, inaccuracy of representations and warranties in any material respect when made or when deemed made, violation of covenants, cross payment-defaults of Rose Rock and its restricted subsidiaries to any material indebtedness, cross acceleration to any material indebtedness, bankruptcy and insolvency events, the occurrence of a change of control, certain unsatisfied judgments, certain ERISA events, certain environmental matters and certain assertions of or actual invalidity of certain loan documents. A default under the Rose Rock credit agreement would permit the participating banks to terminate commitments, require immediate repayment of any outstanding loans with interest and any unpaid accrued fees, and require the cash collateralization of outstanding letter of credit obligations.
The credit agreement restricts Rose Rock’s ability to make certain types of payments relating to its units, including the declaration or payment of cash distributions; provided that Rose Rock may make quarterly distributions of available cash so long as no default under the agreement then exists or would result therefrom. The agreement is:
•	guaranteed by all of Rose Rock’s material domestic subsidiaries; and
•	secured by a lien on substantially all of the property and assets of Rose Rock and the guarantors, subject to customary exceptions.
At December 31, 2013, we were in compliance with the terms of the credit agreement.
SemLogistics credit facilities
SemLogistics entered into a credit agreement in December 2010, which included a £15 million term loan and a £15 million revolving credit facility (U.S. $24.7 million each, at the December 31, 2013 exchange rate). This facility was terminated in March 2012.
SemLogistics recorded interest expense of $1.4 million and $1.0 million for the years ended December 31, 2012 and 2011, respectively, including amortization of debt issuance costs.
During February 2011, we entered into three interest swap agreements. The intent of the swaps was to offset a portion of the variability in interest payments due under the term loan. These swaps were terminated in March 2012 with a loss on closure of $0.4 million, including a reclass of $0.3 million from accumulated other comprehensive income to earnings.
SemMexico facilities
During 2013, SemMexico renewed a credit agreement that allows SemMexico to borrow up to 56 million Mexican pesos (U.S. $4.3 million at the December 31, 2013 exchange rate) at any time during the term of the facility, which matures in July 2014. Borrowings are unsecured and bear interest at the bank prime rate in Mexico plus 1.7%. At December 31, 2013, there were no outstanding borrowings on this facility.
On June 13, 2012, SemMexico entered into a revolving credit agreement that allows SemMexico to borrow up to 44 million Mexican pesos (U.S. $3.4 million at the December 31, 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 December 31, 2013, there were no outstanding borrowings on this facility.
During 2011, SemMexico entered into a credit agreement that allowed SemMexico to borrow up to 56 million Mexican pesos (U.S. $4.3 million at the December 31, 2013 exchange rate) at any time during the term of the facility. This facility matured in August 2012. Borrowings were unsecured and bore interest at the bank prime rate in Mexico plus 1.7%.
During 2010, SemMexico entered into a credit agreement that allowed SemMexico to borrow up to 80 million Mexican pesos (U.S. $6.1 million at the December 31, 2013 exchange rate) at any time through June 2011. Borrowings on this facility were required to be repaid with monthly payments through May 2013.
SemMexico also has outstanding letters of credit of 292.8 million Mexican pesos at December 31, 2013 (U.S. $22.4 million). Fees are generally charged on outstanding letters of credit at a rate of 0.5% .
SemMexico recorded interest expense of $0.2 million, $0.4 million and $0.4 million during the years ended December 31, 2013, 2012 and 2011, respectively, related to these facilities.
At December 31, 2013, we were in compliance with the terms of these facilities.
Scheduled principal payments
The following table summarizes the scheduled principal payments as of December 31, 2013 (in thousands). As described above, our credit agreements require accelerated principal payments under certain circumstances. As a result, principal payments may occur earlier than shown in the table below.
	7.50% Senior Unsecured Notes		SemGroup		Rose Rock		SemMexico		Capital		Total
			Facility		Facility		Facility		Leases
For the year ended:
31-Dec-14	$	—	$	—	$	—	$	—	$	37	$	37
31-Dec-15	—		—		—		—		39		39
31-Dec-16	—		—		—		—		21		21
31-Dec-17	—		—		—		—		15		15
31-Dec-18	—		70,000		245,000		—		13		315,013
Thereafter	300,000		—		—		—		—		300,000
Total	$	300,000	$	70,000	$	245,000	$	—	$	125	$	615,125
Fair value
The fair value of our 7.5% senior unsecured notes was $317 million at December 31, 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 December 31, 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 December 31, 2013. This estimate is categorized as a Level 3 measurement.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Bankruptcy matters
	(a)	Confirmation order appeals
	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 January 28, 2014, the parties reached agreement to settle all outstanding disputes. Once the written settlement agreement is finalized and executed, the Appeal will be dismissed and the parties will release each other from all claims and causes of action.
	(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 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. On February 20, 2014, the Court overruled all requests for summary judgment and ordered Blueknight to allow SemGroup to take further discovery. 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, 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. Remediation costs are expected to be immaterial.
	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. On June 4, 2013, the Federal and Provincial Crown Prosecutors submitted a settlement offer consisting of approximately $400 thousand in fines and a guilty plea on two counts. Following negotiation with the prosecutors, on December 23, 2013, SemCAMS appeared in the Alberta Provincial Court and pled guilty to one count under the Fisheries Act and one count under provincial environmental legislation and agreed to pay a fine of $350 thousand (CAD). This matter is now settled.
	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 a liability associated with these obligations, which is reported within other noncurrent liabilities on the consolidated balance sheets. The following table summarizes the changes in this liability from December 31, 2010 through December 31, 2013 (in thousands):
	Balance at December 31, 2010	$	32,884
	Accretion	4,114
	Payments made	(341		)
	Currency translation adjustments	(771		)
	Balance at December 31, 2011	35,886
	Accretion	4,554
	Payments made	(1,169		)
	Currency translation adjustments	834
	Balance at December 31, 2012	40,105
	Accretion	4,752
	Payments made	(808		)
	Currency translation adjustments	(2,864		)
	Balance at December 31, 2013	$	41,185
	The December 31, 2013 liability was calculated using the $100.9 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. The $100.9 million estimated cost represents only our proportionate share of the obligations associated with these facilities. An additional $41.7 million of estimated costs are attributable to third-party owners’ proportionate share of the obligations. If an owner fails to perform on its obligations, the other owners (including SemGroup) could be obligated to bear that party’s share of the remediation costs.
	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.
	Operating leases
	We have entered into operating lease agreements for office space, office equipment, land, trucks and tank storage. Future minimum payments required under operating leases that have initial or remaining non-cancellable lease terms in excess of one year at December 31, 2013 are as follows (in thousands):
	For year ending:
	31-Dec-14	$	8,618
	31-Dec-15	8,890
	31-Dec-16	8,752
	31-Dec-17	6,737
	31-Dec-18	2,785
	Thereafter	6,213
	Total future minimum lease payments	$	41,995
	We recorded lease and rental expenses of $11.4 million, $8.4 million and $9.4 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	Purchase and sale commitments
	We routinely enter into agreements to purchase and sell petroleum products at specified future dates. We account for these commitments as normal purchases and sales, and therefore we do not record assets or liabilities related to these agreements until the product is purchased or sold. At December 31, 2013, such commitments included the following (in thousands):
		Volume			Value
		(barrels)
	Fixed price purchases	337			$	30,767
	Fixed price sales	397			$	38,311
	Floating price purchases	14,610			$	1,432,982
	Floating price sales	15,785			$	1,458,312
	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 December 31, 2013, approximately $25.8 thousand was due under the contract and the amount of future obligation is approximately $87.3 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 5 for capital commitments related to Glass Mountain Pipeline and the White Cliffs expansion project.

Equity

Equity	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Equity	'
	EQUITY
	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 December 31, 2013, we have issued 228,309 shares of this stock and will issue the remainder as the process of resolving the claims progresses. The owners’ equity balances on the 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 consolidated balance sheet at December 31, 2013 are summarized below:
	Shares issued on Emergence Date	40,882,496
	Shares subsequently issued in settlement of pre-petition claims	228,309
	Remaining shares required to be issued in settlement of pre-petition claims	289,191
	Issuance of shares under employee and director compensation programs (*)	691,570
	Shares issued upon exercise of warrants (**)	441,325
	Total shares	42,532,891
	Par value per share	$	0.01
	Common stock on December 31, 2013 balance sheet (in thousands)	$	425
	(*) These shares include 107,988 shares which vested during the year ended December 31, 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 consolidated balance sheet.
	(**) These shares include 425,618 shares issued during the year ended December 31, 2013.
	In addition to the shares in the table above, there are shares of unvested restricted stock outstanding at December 31, 2013. The par value of these shares has not yet been reflected in common stock on the 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 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 common stock outstanding at December 31, 2013 and 2012 includes 28,235 shares of Class B stock. 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.
	Warrants
	Upon emergence from bankruptcy protection, 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 December 31, 2013, we have issued 240,310 of the warrants and will issue the remainder as the process of resolving the claims progresses. Beginning September 2011, the warrants began trading on the New York Stock Exchange under the ticker symbol, SEMGWS. The warrants reflected on the consolidated balance sheet at December 31, 2013 are summarized below:
	Warrants issued on Emergence Date	1,634,210
	Warrants subsequently issued in settlement of pre-petition claims	240,310
	Remaining warrants to be issued in settlement of pre-petition claims	304,427
	Warrants exercised	(818,124		)
	Total warrants at December 31, 2013	1,360,823
	Fair value per warrant at December 31, 2013	$	42.72
	Warrant liability on December 31, 2013 consolidated balance sheet (in thousands)	$	58,134
	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.
	Dividends
	We began paying a quarterly cash dividend in the second quarter of 2013. The following table sets forth the quarterly dividends per share declared and paid to shareholders for the periods indicated:
	Quarter Ending	Dividend Per Share			Date Declared	Date of Record	Date Paid
	30-Jun-13	$	0.19		May 8, 2013	May 20, 2013	30-May-13
	30-Sep-13	$	0.2		August 8, 2013	August 19, 2013	30-Aug-13
	31-Dec-13	$	0.21		November 11, 2013	November 22, 2013	3-Dec-13
	31-Mar-14	$	0.22		February 25, 2014	March 10, 2014	20-Mar-14

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	EARNINGS PER SHARE
	The following summarizes the calculation of basic earnings per share for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share amounts):
		Year Ended December 31, 2013
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	65,753	$	59		$	65,812
	less: Income attributable to noncontrolling interest	17,710		—			17,710
	Numerator	$	48,043	$	59		$	48,102
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercises	939		939			939
	Denominator	42,339		42,339			42,339
	Basic earnings per share	$	1.13	$	0		$	1.14
		Year Ended December 31, 2012
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	28,958	$	2,939		$	31,897
	less: Income attributable to noncontrolling interest	9,797		—			9,797
	Numerator	$	19,161	$	2,939		$	22,100
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercises	539		539			539
	Denominator	41,939		41,939			41,939
	Basic earnings per share	$	0.46	$	0.07		$	0.53
		Year Ended December 31, 2011
		Continuing		Discontinued			Net
		Operations		Operations
	Income (loss)	$	12,360	$	(9,548	)	$	2,812
	less: Income attributable to noncontrolling interest	435		—			435
	Numerator	$	11,925	$	(9,548	)	$	2,377
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans	240		240			240
	Denominator	41,640		41,640			41,640
	Basic earnings (loss) per share	$	0.29	$	(0.23	)	$	0.06
	The following summarizes the calculation of diluted earnings per share for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share amounts):
		Year Ended December 31, 2013
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	65,753	$	59		$	65,812
	less: Income attributable to noncontrolling interest	17,710		—			17,710
	Numerator	$	48,043	$	59		$	48,102
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercise	939		939			939
	Effect of dilutive securities	307		307			307
	Denominator	42,646		42,646			42,646
	Diluted earnings per share	$	1.13	$	0		$	1.13
		Year Ended December 31, 2012
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	28,958	$	2,939		$	31,897
	less: Income attributable to noncontrolling interest	9,797		—			9,797
	Numerator	$	19,161	$	2,939		$	22,100
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercises	539		539			539
	Effect of dilutive securities	315		315			315
	Denominator	42,254		42,254			42,254
	Diluted earnings per share	$	0.45	$	0.07		$	0.52
		Year Ended December 31, 2011
		Continuing		Discontinued			Net
		Operations		Operations
	Income (loss)	$	12,360	$	(9,548	)	$	2,812
	less: Income attributable to noncontrolling interest	435		—			435
	less: Income resulting from change in fair value of warrants	5,012		—			5,012
	Numerator	$	6,913	$	(9,548	)	$	(2,635	)
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
Weighted average common stock outstanding issued under compensation plans	240		240			240
Denominator	41,640		41,640			41,640
Diluted earnings (loss) per share	$	0.17	$	(0.23	)	$	(0.06	)
For the years ended December 31, 2013 and December 31, 2012, we recorded a loss on the change in the fair value of the warrants; because of this, the warrants did not cause any dilution for that period. For the year ended December 31, 2011, we recorded a gain on the change in the fair value of the warrants of $5.0 million.
On January 1, 2014, we issued 75,942 shares of common stock upon the vesting of certain grants of restricted stock and restricted stock units. These shares are not reflected in the shares of common stock shown in the tables above.

EquityBased_Compensation

Equity-Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity-Based Compensation	'
	EQUITY-BASED COMPENSATION
	SemGroup Corporation equity awards
	We have reserved a total of 2,781,635 shares of common stock for issuance pursuant to employee and director compensation programs. These awards give the recipients the right to receive shares of common stock, once specified service or performance related vesting conditions are met. The awards typically have one year vesting period for non-management directors and three years for employees. We record expense for these awards (and corresponding increases to additional paid-in capital) based on the grant date fair value of the awards. Although these awards are to be settled in shares, we may elect to give participants the option of settling a portion of the awards in cash, to meet statutory minimum tax withholding requirements. The activity related to these awards is summarized below:
		Unvested			Average
		Shares			Grant Date
					Fair Value(*)
	Outstanding at December 31, 2010	502,902			$	25
	Awards granted - 2011 (**)	173,982			$	28.9
	Awards vested - 2011	(201,361	)		$	25
	Awards forfeited - 2011	(65,017	)		$	25.36
	Outstanding at December 31, 2011	410,506			$	26.59
	Awards granted - 2012 (**)	246,432			$	27.81
	Awards vested - 2012	(162,986	)		$	25.2
	Award forfeited - 2012	(43,400	)		$	27.74
	Outstanding at December 31, 2012	450,552			$	26.87
	Awards granted - 2013 (**)	201,451			$	52.78
	Awards vested - 2013	(107,988	)		$	25.71
	Award forfeited - 2013	(13,412	)		$	32.36
	Outstanding at December 31, 2013	530,603			$	36.8
	(*)	The grant date fair value of awards issued prior to our listing on the New York Stock Exchange was estimated at $25 per share, which was the per share reorganization value of the Company. Subsequent to our listing, the grant date fair value is determined based on the closing price on the New York Stock Exchange on the date of issue.
	(**)	For certain of the awards granted in 2013, 2012 and 2011, the number of shares that will vest is contingent upon our achievement of certain specified targets. Awards with performance conditions are valued based on the grant date closing price on the New York Stock Exchange assuming that 100% of the awards will vest. Awards with market conditions are valued using Monte Carlo simulations. Market awards issued in 2013 were valued using blended volatility of 28.9%, comprised of 50% historical volatility and 50% implied volatility and a risk-free rate based on the three-year United States Treasury spot rate on the grant date. If we meet the specified maximum targets, approximately 74 thousand, 41 thousand and 26 thousand additional shares could vest related to the 2013, 2012 and 2011 awards, respectively.
	The following table, which includes potential shares from specified targets, assuming maximum achievement (as discussed above), summarizes the scheduled vesting of awards that have been granted as of December 31, 2013:
	Year ended December 31, 2014	165,980		shares
	Year ended December 31, 2015	244,912		shares
	Year ended December 31, 2016	260,898		shares
	During the month of January 2014, 75,942 of these awards vested.
	The awards may be subject to accelerated vesting in the event of involuntary terminations.
	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 December 31, 2013, the value of the UDs related to unvested restricted stock awards was approximately $120 thousand. This is equivalent to 1,839 Class A shares based on the year end close of business market price of our Class A shares of $65.23 per share. Dividends related to the 2013 restricted stock awards will be settled in cash upon vesting.
	Compensation costs expensed for the years ended December 31, 2013, 2012 and 2011 were $6.5 million, $6.2 million and $5.4 million, respectively. As of December 31, 2013, there was $10.3 million of total unrecognized compensation cost related to our nonvested awards, which is expected to be recognized over a weighted-average period of 17 months.
	Rose Rock Midstream L.P. equity-based compensation
	Certain of our employees who support Rose Rock participate in Rose Rock's equity-based compensation program. Awards under this program generally represent awards of restricted common units representing limited partner interests of Rose Rock, which are typically subject to three year vesting periods. Vesting of these awards dilutes our ownership interest and requires additional equity contributions to Rose Rock to maintain our 2% general partner interest.  The activity related to these awards is summarized below:
		Unvested Units			Average Grant Date Fair Value
	Outstanding at December 31, 2011	—			$	—
	Awards granted - 2012	46,069			$	21.97
	Awards vested - 2012	—			$	—
	Awards forfeited - 2012	(2,109	)		$	20.6
	Outstanding at December 31, 2012	43,960			$	21.91
	Awards granted - 2013	49,104			$	34.41
	Awards vested - 2013	(9,333	)		$	27.25
	Awards forfeited - 2013	(783	)		$	34.4
	Outstanding at December 31, 2013	82,948			$	28.59
	The following table summarizes the scheduled vesting of awards that have been granted as of December 31, 2013:
	Year ended December 31, 2014	5,712		common units
	Year ended December 31, 2015	34,627		common units
	Year ended December 31, 2016	42,609		common units
	Expense of $0.8 million and $0.3 million related to these awards was recorded for the years ended December 31, 2013 and 2012, respectively, and represents an increase in noncontrolling interests in consolidated subsidiaries.  As of December 31, 2013, there was $1.5 million of total unrecognized compensation cost related to the nonvested awards, which is expected to be recognized over a weighted-average period of 19 months.
	The holders of certain of these restricted unit awards granted prior to 2013 are entitled to equivalent distributions (“Unvested Unit Distributions” or “UUD’s”) to be received upon vesting of the restricted unit awards. The distributions will be settled in common units based on the market price of Rose Rock's limited partner common units as of the close of business on the vesting date. The UUD’s are subject to the same forfeiture and acceleration conditions as the associated restricted units. For the year ended December 31, 2013, 406 UUDs were issued upon the vesting of these restricted units. At December 31, 2013, the value of the UUD’s was approximately $101 thousand. This is equivalent to approximately 2,617 common units based on the year end close of business market price of Rose Rock's common units of $38.70 per unit. Holders of restricted units granted in 2013 are entitled to received distributions made during the vesting period in cash upon vesting.
	Retention Awards
	During June 2010, we granted retention awards to certain officers and employees, which were scheduled to vest in December 2011, contingent on the continued service of the recipients. Each award had a specified value that was payable either in cash or in shares of SemGroup stock.
	We recorded $2.4 million of expense during 2011 related to these retention awards. Upon vesting during 2011, we settled awards with a value of $1.2 million by paying cash, and we settled awards with a value of $3.2 million by issuing 125,212 shares of common stock.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
		EMPLOYEE BENEFIT PLANS
	Defined contribution plans
	We sponsor defined contribution retirement plans in which the majority of employees are eligible to participate. Our contributions to the defined contribution plans were $1.1 million, $0.9 million, and $1.1 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	Pension plans
	We sponsor a defined benefit pension plan and a supplemental defined benefit pension plan (collectively, the “Pension Plans”) for certain employees of the SemCAMS segment hired before June 30, 2001. The following table shows the projected benefit obligations and plan assets of the Pension Plans (in thousands):
		December 31,				December 31,
		2013				2012
	Change in projected benefit obligation:
	Projected benefit obligation at beginning of year	$	28,357			$	26,767
	Service cost	577				596
	Interest cost	1,047				1,134
	Actuarial (gains) losses	(3,022		)		1,436
	Benefits paid	(968		)		(2,193		)
	Currency translation adjustment	(1,955		)		617
	Projected benefit obligation at end of year	24,036				28,357
	Change in fair value of plan assets:
	Fair value of plan assets at beginning of year	22,727				21,008
	Employer contributions	1,144				1,297
	Actual return on plan assets	4,397				2,123
	Benefits paid	(968		)		(2,193		)
	Currency translation adjustment	(1,718		)		492
	Fair value of plan assets at end of year	25,582				22,727
	Funded status:	$	1,546			$	(5,630	)
	Accumulated benefit obligation at end of year	$	22,687			$	26,725
	The following table sets forth the assumptions used to determine the projected benefit obligation of the Pension Plans for the periods indicated:
		Year Ended December 31, 2013			Year Ended December 31, 2012
	Discount rate	4.7	%		3.9	%
	Compensation increase rate	3.5	%		3.5	%
	We recorded other noncurrent assets of $1.5 million at December 31, 2013, and other noncurrent liabilities of $5.6 million at December 31, 2012, to reflect the funded status of the Pension Plans. We recorded changes in the funded status of the Pension Plans to other comprehensive income (loss), net of income taxes. These amounts were a gain of $4.8 million for the year ended December 31, 2013 and losses of $0.4 million and $1.7 million for the years ended December 31, 2012, and 2011, respectively.
	The following table summarizes the components of the net periodic benefit cost related to the Pension Plans (in thousands):
		Year Ended December 31, 2013				Year Ended December 31, 2012				Year Ended December 31, 2011
	Service cost	$	577			$	596			$	742
	Interest cost	1,047				1,134				1,494
	Expected return on plan assets	(1,298		)		(1,263		)		(1,585		)
	Settlement loss	—				(55		)		703
	Other	186				118				—
	Net periodic benefit cost	$	512			$	530			$	1,354
	The following table sets forth the assumptions used to determine net periodic benefit cost related to the Pension Plans for the periods indicated:
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Discount rate	3.9	%		4.25	%		5.25	%
	Expected long-term rate of return on plan assets	6	%		6	%		6.75	%
	Compensation increase rate	3.5	%		3.5	%		3.5	%
	The expected return on plan assets is determined annually based upon a review of the historical returns experienced, combined with the general economic industry outlook.
	We estimate that benefit payments from the Pension Plans will be as follows for the years 2014 – 2023 (in thousands):
	Year		Estimated
			Benefit Payments
	2014		$	1,636
	2015		$	1,826
	2016		$	1,999
	2017		$	2,039
	2018		$	1,808
	2019 - 2023		$	8,732
	We estimate that we will make contributions of $1.0 million to the Pension Plans during the year ended December 31, 2014.
	Substantially all of the plan’s assets are invested in pooled funds that hold highly-liquid securities. The value of each share of a pooled fund is calculated based on the quoted market prices of the assets held by the fund. The following table shows the value of each category of plan assets at December 31, 2013 and 2012 and the target investment allocation under our investment policy at December 31, 2013:
		Asset Value at				Asset Value at				Actual			Normal			Minimum			Maximum
		December 31,				December 31,				Allocation at			Allocation			Allocation			Allocation
		2013				2012				December 31,			Per			Per			Per
		(in thousands)				(in thousands)				2013			Investment			Investment			Investment
													Policy			Policy			Policy
	Cash and cash equivalents	$	171			$	—			0.7	%		—	%		0	%		10	%
	Pooled funds—fixed income	8,381				8,018				32.8	%		40	%		32.5	%		47.5	%
	Pooled funds—Canadian equities	8,324				7,391				32.5	%		30	%		22.5	%		37.5	%
	Pooled funds—non-Canadian equities	8,706				7,318				34	%		30	%		22.5	%		37.5	%
Total	$	25,582			$	22,727
Our investment policy for plan assets permits investments in a wide variety of assets, including certain types of derivatives. Our policy prohibits investments of plan assets in certain types of assets, including commodities, mineral rights and collectibles. Our investment policy requires us to maintain an investment allocation within the ranges shown in the table above, and also contains more specific requirements that are designed to achieve an appropriate level of diversification.
The following information discloses the fair values of our Pension Plan assets, by asset category, for the periods indicated (in thousands):
	31-Dec-13										31-Dec-12
	Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)				Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Cash and cash equivalents	$	171		$	—		$	—			$	—		$	—		$	—
Fixed income mutual funds (a)	—			8,381			—				—			8,018			—
Equity mutual funds (a)	—			17,030			—				—			14,709			—
Total	$	171		$	25,411		$	—			$	—		$	22,727		$	—
(a) Mutual funds are valued daily in actively traded markets by an independent custodian for the investment manager. For purposes of calculating the value, portfolio securities and other assets for which market quotes are readily available are valued at market value. Market value is generally determined on a basis of last reported sales prices, or if no sales are reported, based on quotes obtained from a quotation reporting system, established market makers, or pricing services. Investments initially valued in currencies other than the U.S. dollar are converted to the U.S. dollar using exchange rates obtained from pricing services.
Retiree medical plan
We sponsor an unfunded, post-employment health benefit plan (the “Health Plan”) for certain employees of the SemCAMS segment. The projected benefit obligation related to the Health Plan was $1.6 million at December 31, 2013 and $1.8 million at December 31, 2012, and is reported within other noncurrent liabilities on the consolidated balance sheets.
Termination benefits
The laws in Canada, the United Kingdom and Mexico require us to pay certain benefits to employees if their employment is terminated without cause. We recorded $0.4 million of expense during 2011 for termination benefits related to the wind-down of certain operations of SemCanada Crude.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
	The following table presents changes in the components of accumulated other comprehensive income (loss) (in thousands):
		Currency			Employee			Interest			Total
		Translation			Benefit			Rate Swaps
					Plans
	Balance, December 31, 2010	$	2,295		$	(1,180	)	$	—		$	1,115
	Currency translation adjustment	(13,075		)	—			—			(13,075		)
	Changes related to interest rate swaps, net of income tax benefit of $74	—			—			(284		)	(284		)
	Changes related to benefit plans, net of income tax benefit of $553	—			(1,631		)	—			(1,631		)
	Balance, December 31, 2011	(10,780		)	(2,811		)	(284		)	(13,875		)
	Currency translation adjustment, net of income tax expense of $1,168	12,635			—			—			12,635
	Settlement of interest rate swaps	—			—			284			284
	Changes related to benefit plans, net of income tax benefit of $117	—			(343		)	—			(343		)
	Balance, December 31, 2012	1,855			(3,154		)	—			(1,299		)
	Currency translation adjustment, net of income tax benefit of $3,993	(6,363		)	—			—			(6,363		)
	Changes related to benefit plans, net of income tax expense of $1,603	—			4,808			—			4,808
	Balance, December 31, 2013	$	(4,508	)	$	1,654		$	—		$	(2,854	)

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flow Information	'
	SUPPLEMENTAL CASH FLOW INFORMATION
	Operating assets and liabilities
	The following table summarizes the changes in the components of operating assets and liabilities (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Decrease (increase) in restricted cash	$	29,467		$	4,907		$	25,827
	Decrease (increase) in accounts receivable	11,172			(129,102		)	28,568
	Decrease (increase) in receivable from affiliates	(61,095		)	230			(6,071		)
	Decrease (increase) in inventories	(11,352		)	(936		)	(8,908		)
	Decrease (increase) in derivatives and margin deposits	1,012			(1,245		)	14,287
	Decrease (increase) in other current assets	9,361			4,197			(7,214		)
	Decrease (increase) in other assets	137			2,467			(1,874		)
	Increase (decrease) in accounts payable and accrued liabilities	31,030			114,776			(9,446		)
	Increase (decrease) in payable to affiliates	62,279			(6,871		)	6,614
	Increase (decrease) in payables to pre-petition creditors	(29,609		)	(5,206		)	(34,490		)
	Increase (decrease) in other noncurrent liabilities	(2,541		)	2,500			4,115
		$	39,861		$	(14,283	)	$	11,408
	Non-cash transactions
	On November 1, 2011, we contributed certain assets and liabilities to NGL Energy in return for cash and ownership interests in NGL Energy and its general partner. The assets and liabilities we contributed are summarized in Note 7.
	In 2013, we recorded a $180.2 million reduction to noncontrolling interests in consolidated subsidiaries and an offsetting increase to additional paid-in capital of $112.9 million (net of tax impact of $67.3 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 two-thirds interest in SCPL (Note 4).
	During the year ended December 31, 2013, we issued 425,618 shares of Class A common stock related to the exercise of warrants resulting in the non-cash reclassification of $21.4 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.
	Other supplemental disclosures
	We paid cash for interest totaling $23.9 million, $8.0 million and $32.6 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	We paid cash for income taxes (net of refunds received) in the amount of $13.9 million, $11.4 million and $10.1 million during the years ended December 31, 2013, 2012 and 2011, respectively.
	We accrued $10.1 million, $1.6 million and $4.0 million at December 31, 2013, 2012 and 2011, respectively, for purchases of property, plant and equipment.

Quarterly_Financial_Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Quarterly Financial Data (Unaudited)	'
	QUARTERLY FINANCIAL DATA (UNAUDITED)
	Summarized information on our consolidated results of operations for the quarters during the year ended December 31, 2013 is shown below (in thousands, except per share amounts):
		First			Second			Third			Fourth			Total
		Quarter			Quarter			Quarter			Quarter
	Total revenues	$	287,696		$	324,244		$	357,748		$	457,328		$	1,427,016
	Loss (gain) on disposal of long-lived assets, net	(162		)	(376		)	408			(109		)	(239		)
	Other operating costs and expenses	282,813			312,103			344,979			448,796			1,388,691
	Total expenses	282,651			311,727			345,387			448,687			1,388,452
	Earnings from equity method investments	17,345			14,861			7,483			12,788			52,477
	Gain on issuance of common units by equity method investee	—			—			—			26,873			26,873
	Operating income	22,390			27,378			19,844			48,302			117,914
	Other expenses, net	27,862			10,613			13,294			17,646			69,415
	Income (loss) from continuing operations before income taxes	(5,472		)	16,765			6,550			30,656			48,499
	Income tax expense (benefit)	(54,006		)	9,288			3,413			24,051			(17,254		)
	Income from continuing operations	48,534			7,477			3,137			6,605			65,753
	Income (loss) from discontinued operations, net of income taxes	32			35			(2		)	(6		)	59
	Net income	48,566			7,512			3,135			6,599			65,812
	Less: net income attributable to noncontrolling interests	5,143			3,943			5,054			3,319			17,710
	Net income (loss) attributable to SemGroup	$	43,423		$	3,569		$	(1,919	)	$	3,280		$	48,102
	Earnings (loss) per share—basic	$	1.03		$	0.08		$	(0.05	)	$	0.08		$	1.14
	Earnings (loss) per share—diluted	$	1.03		$	0.08		$	(0.05	)	$	0.08		$	1.13
	Summarized information on our consolidated results of operations for the quarters during the year ended December 31, 2012 is shown below (in thousands, except per share amounts):
		First			Second			Third			Fourth			Total
		Quarter			Quarter			Quarter			Quarter
	Total revenues	$	312,031		$	331,777		$	277,852		$	315,837		$	1,237,497
	Loss (gain) on disposal of long-lived assets, net	—			119			(3,615		)	(35		)	(3,531		)
	Other operating costs and expenses	311,067			330,768			270,958			306,920			1,219,713
	Total expenses	311,067			330,887			267,343			306,885			1,216,182
	Earnings from equity method investments	7,498			12,289			3,116			13,133			36,036
	Operating income	8,462			13,179			13,625			22,085			57,351
	Other expenses, net	7,616			5,587			11,701			5,567			30,471
	Income from continuing operations before income taxes	846			7,592			1,924			16,518			26,880
	Income tax expense (benefit)	(1,012		)	(92		)	2,092			(3,066		)	(2,078		)
	Income (loss) from continuing operations	1,858			7,684			(168		)	19,584			28,958
	Income (loss) from discontinued operations, net of income taxes	252			(441		)	(264		)	3,392			2,939
	Net income (loss)	2,110			7,243			(432		)	22,976			31,897
	Less: net income attributable to noncontrolling interests	3,483			2,096			2,336			1,882			9,797
	Net income (loss) attributable to SemGroup	$	(1,373	)	$	5,147		$	(2,768	)	$	21,094		$	22,100
	Earnings (loss) per share—basic	$	(0.03	)	$	0.12		$	(0.07	)	$	0.5		$	0.53
	Earnings (loss) per share—diluted	$	(0.03	)	$	0.12		$	(0.07	)	$	0.5		$	0.52
	In the third quarter of 2012, we classified SemStream Arizona's residential business as discontinued operations. Prior periods were recast to reflect the discontinued operations classification. See Notes 7 and 8 for additional information.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	RELATED PARTY TRANSACTIONS
	NGL Energy
	As described in Note 5, we own interests in NGL Energy, which we account for under the equity method.
	During the years ended December 31, 2013, 2012 and 2011 we purchased condensate and propane from and sold natural gas liquids to NGL Energy. During the years ended December 31, 2013, 2012 and 2011 we received payments from NGL Energy for transition services and certain on-going services. The amounts were as follows for the years ended December 31, 2013, 2012 and 2011 (in thousands):
		Year Ended December 31, 2013		Year Ended December 31, 2012		Year Ended December 31, 2011
	Revenues	$	103,203	$	58,643	$	9,708
	Purchases	$	15,255	$	42,741	$	11,270
	Reimbursements from NGL Energy for services	$	198	$	575	$	346
	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 $132.8 million and $42.6 million for the years ended December 31, 2013 and 2012, respectively. Purchases from High Sierra were $102.2 million and $44.4 million for the years ended December 31, 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 consolidated statements of operations and comprehensive income (loss) as the purchases of inventory and subsequent sales of the inventory were with the same counterparty.
	White Cliffs
	We generated approximately $2.9 million, $2.5 million and $2.2 million of revenue from services we provided to White Cliffs during the years ended December 31, 2013, 2012 and 2011, respectively.
	Glass Mountain
	As described in Note 5, in April 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, Oklahoma. 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 received $0.9 million prorated over the period of construction. For the years ended December 31, 2013 and 2012, Glass Mountain paid $0.5 million and $0.4 million, respectively, to GMH pursuant to this agreement.
	Gavilon, LLC
	In December 2013, our equity method investee, NGL Energy, announced the acquisition of Gavilon, LLC ("Gavilon"). Through the acquisition, NGL Energy acquired the 50% interest in Glass Mountain held by Gavilon. We generated sales to Gavilon of $560.4 million for the year ended December 31, 2013. Purchases from Gavilon were $552.1 million for the year ended December 31, 2013. Transactions with Gavilon primarily relate to leased storage and transportation services of crude oil, including buy/sell transactions. In accordance with ASC 845-10-15, buy/sell transactions were reported as revenue on a net basis in our consolidated statements of operations and comprehensive income (loss) as the purchases of inventory and subsequent sales of the inventory were with the same counterparty.
	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 $1.9 million, $1.7 million and $1.8 million in legal fees and related expenses to this law firm during the years ended December 31, 2013, 2012 and 2011, respectively (of which $0.2 million, $0.1 million and $0.2 million was paid by White Cliffs, respectively).

Condensed_Consolidating_Guaran

Condensed Consolidating Guarantor Financial Statements	12 Months Ended
	Dec. 31, 2013
Condensed Consolidating Guarantor Financial Statements [Abstract]	'
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	'
	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 as follows: SemGas, L.P., SemCanada, L.P., SemCanada II, L.P., SemMaterials, L.P., SemGroup Europe Holding, L.L.C., SemOperating G.P., L.L.C., SemMexico, L.L.C., SemDevelopment, L.L.C., Rose Rock Midstream Holdings, LLC, Wattenberg Holding, LLC, Glass Mountain Holding, LLC and Mid-America Midstream Gas Services, L.L.C. (collectively, the "Guarantors").
	In accordance with a Registration Rights Agreement, in December 2013 the Company filed a registration statement with the SEC, which was declared effective on January 2, 2014, so that holders of the Notes could 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. An exchange offer was commenced on January 3, 2014 and expired on February 4, 2014. All of the Notes were exchanged. The guarantees of the Exchange Notes are full and unconditional and constitute the joint and several obligations of the Guarantors.
	Each of the Guarantors is 100% owned by SemGroup Corporation (the "Parent"). 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.
	Condensed consolidating financial statements for the Parent, the Guarantors and non-guarantors as of December 31, 2013 and 2012 and for the years ended December 31, 2013, 2012 and 2011 is as follows (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. Quarterly cash distributions from Rose Rock representing a return on capital have been included in the Parent's cash flows from operations. Dispositions of the Parent's investments in subsidiaries have been treated as investing activities in the cash flow statement, consistent with the presentation of investments in subsidiaries as equity method investments. These balances are eliminated through consolidating adjustments below.
	Condensed Consolidating Guarantor Balance Sheets
		31-Dec-13
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	ASSETS
	Current assets:
	Cash and cash equivalents	$	2,545		$	—		$	78,364		$	(1,558	)	$	79,351
	Restricted cash	3,851			—			1,268			—			5,119
	Accounts receivable	649			14,642			308,674			—			323,965
	Receivable from affiliates	1,519			14,063			56,040			(4,349		)	67,273
	Inventories	—			1,046			43,249			—			44,295
	Other current assets	8,712			193			5,106			—			14,011
	Total current assets	17,276			29,944			492,701			(5,907		)	534,014
	Property, plant and equipment	4,114			366,067			735,547			—			1,105,728
	Equity method investments	1,511,922			461,056			159,321			(1,567,175		)	565,124
	Goodwill	—			23,839			38,182			—			62,021
	Other intangible assets	31			163,144			11,663			—			174,838
	Other noncurrent assets, net	15,263			1,302			12,324			—			28,889
	Total assets	$	1,548,606		$	1,045,352		$	1,449,738		$	(1,573,082	)	$	2,470,614
	LIABILITIES AND OWNERS’ EQUITY
	Current liabilities:
	Accounts payable	$	1,172		$	24,234		$	229,061		$	—		$	254,467
	Payable to affiliates	17			115			67,062			(4,915		)	62,279
	Accrued liabilities	10,072			17,341			56,011			5			83,429
	Payables to pre-petition creditors	3,124			—			53			—			3,177
	Deferred revenue	—			—			25,538			—			25,538
	Other current liabilities	61,875			715			7,697			—			70,287
	Current portion of long-term debt	—			—			37			—			37
	Total current liabilities	76,260			42,405			385,459			(4,910		)	499,214
	Long-term debt	370,000			—			245,088			—			615,088
	Deferred income taxes	48,436			—			52,509			—			100,945
	Other noncurrent liabilities	8			—			41,496			—			41,504
	Commitments and contingencies
	Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	1,053,902			1,002,947			565,225			(1,568,172		)	1,053,902
	Noncontrolling interests in consolidated subsidiaries	—			—			159,961			—			159,961
	Total owners’ equity	1,053,902			1,002,947			725,186			(1,568,172		)	1,213,863
	Total liabilities and owners’ equity	$	1,548,606		$	1,045,352		$	1,449,738		$	(1,573,082	)	$	2,470,614
		31-Dec-12
		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
	Year Ended December 31, 2013
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	224,072		$	944,984		$	(23,952	)	$	1,145,104
Service	—			3,868			136,330			—			140,198
Other	—			—			141,714			—			141,714
Total revenues	—			227,940			1,223,028			(23,952		)	1,427,016
Expenses:													—
Costs of products sold, exclusive of depreciation and amortization shown below	—			166,735			877,317			(23,952		)	1,020,100
Operating	—			19,541			204,044			—			223,585
General and administrative	21,560			9,437			47,600			—			78,597
Depreciation and amortization	2,001			14,452			49,956			—			66,409
Loss (gain) loss on disposal of long-lived assets, net	—			668			(907		)	—			(239		)
Total expenses	23,561			210,833			1,178,010			(23,952		)	1,388,452
Earnings from equity method investments	67,965			54,995			44,203			(114,686		)	52,477
Gain on issuance of common units by equity method investee	26,873			—			—			—			26,873
Operating income	71,277			72,102			89,221			(114,686		)	117,914
Other expenses (income):													—
Interest expense	4,826			9,781			15,947			(5,412		)	25,142
Foreign currency transaction loss (gain)	—			—			(1,633		)	—			(1,633		)
Other expense (income), net	40,928			—			(434		)	5,412			45,906
Total other expenses, net	45,754			9,781			13,880			—			69,415
Income from continuing operations before income taxes	25,523			62,321			75,341			(114,686		)	48,499
Income tax expense (benefit)	(22,579		)	—			5,325			—			(17,254		)
Income from continuing operations	48,102			62,321			70,016			(114,686		)	65,753
Income (loss) from discontinued operations, net of income taxes	—			65			(6		)	—			59
Net income	48,102			62,386			70,010			(114,686		)	65,812
Less: net income attributable to noncontrolling interests	—			—			17,710			—			17,710
Net income attributable to SemGroup	$	48,102		$	62,386		$	52,300		$	(114,686	)	$	48,102
Net income	$	48,102		$	62,386		$	70,010		$	(114,686	)	$	65,812
Other comprehensive loss, net of income taxes	(1,517		)	—			(38		)	—			(1,555		)
Comprehensive income	46,585			62,386			69,972			(114,686		)	64,257
Less: comprehensive income attributable to noncontrolling interests	—			—			17,710			—			17,710
Comprehensive income attributable to SemGroup	$	46,585		$	62,386		$	52,262		$	(114,686	)	$	46,547
	Year Ended December 31, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	123,424		$	840,892		$	(10,578	)	$	953,738
Service	—			1,198			116,523			—			117,721
Other	—			387			165,651			—			166,038
Total revenues	—			125,009			1,123,066			(10,578		)	1,237,497
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			98,224			787,239			(10,578		)	874,885
Operating	—			12,719			211,981			—			224,700
General and administrative	22,105			8,360			41,453			—			71,918
Depreciation and amortization	2,496			6,448			39,266			—			48,210
(Gain) loss on disposal of long-lived assets, net	—			276			(3,807		)	—			(3,531		)
Total expenses	24,601			126,027			1,076,132			(10,578		)	1,216,182
Earnings from equity method investments	66,671			85,330			36,439			(152,404		)	36,036
Operating income	42,070			84,312			83,373			(152,404		)	57,351
Other expenses (income):
Interest expense	3,942			(240		)	11,056			(5,856		)	8,902
Foreign currency transaction loss	—			—			298			—			298
Other expense (income), net	15,698			(21		)	(262		)	5,856			21,271
Total other expenses (income), net	19,640			(261		)	11,092			—			30,471
Income from continuing operations before income taxes	22,430			84,573			72,281			(152,404		)	26,880
Income tax expense (benefit)	334			—			(2,412		)	—			(2,078		)
Income from continuing operations	22,096			84,573			74,693			(152,404		)	28,958
Income (loss) from discontinued operations, net of income taxes	4			(17		)	2,952			—			2,939
Net income	22,100			84,556			77,645			(152,404		)	31,897
Less: net income attributable to noncontrolling interests	—			—			9,797			—			9,797
Net income attributable to SemGroup	$	22,100		$	84,556		$	67,848		$	(152,404	)	$	22,100
Net income	$	22,100		$	84,556		$	77,645		$	(152,404	)	$	31,897
Other comprehensive income, net of income taxes	917			—			11,659			—			12,576
Comprehensive income	23,017			84,556			89,304			(152,404		)	44,473
Less: comprehensive income attributable to noncontrolling interests	—			—			9,797			—			9,797
Comprehensive income attributable to SemGroup	$	23,017		$	84,556		$	79,507		$	(152,404	)	$	34,676
	Year Ended December 31, 2011
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	712,724		$	609,870		$	(85,281	)	$	1,237,313
Service	—			2,778			120,567			—			123,345
Other	—			311			104,277			—			104,588
Total revenues	—			715,813			834,714			(85,281		)	1,465,246
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			673,927			555,793			(85,281		)	1,144,439
Operating	—			14,594			140,447			—			155,041
General and administrative	15,564			13,854			46,029			—			75,447
Depreciation and amortization	2,930			8,892			38,001			—			49,823
(Gain) loss on disposal of long-lived assets, net	1,605			(46,139		)	44,835			—			301
Total expenses	20,099			665,128			825,105			(85,281		)	1,425,051
Earnings (losses) from equity method investments	32,096			(20,736		)	15,004			(11,360		)	15,004
Operating income	11,997			29,949			24,613			(11,360		)	55,199
Other expenses (income):
Interest expense	24,352			19,498			21,157			(4,869		)	60,138
Foreign currency transaction loss (gain)	—			39			(3,489		)	—			(3,450		)
Other (income) expense, net	(12,141		)	(2,150		)	(2,117		)	4,869			(11,539		)
Total other expenses, net	12,211			17,387			15,551			—			45,149
Income (loss) from continuing operations before income taxes	(214		)	12,562			9,062			(11,360		)	10,050
Income tax (benefit) expense	(2,485		)	—			175			—			(2,310		)
Income from continuing operations	2,271			12,562			8,887			(11,360		)	12,360
Income (loss) from discontinued operations, net of income taxes	106			28			(9,682		)	—			(9,548		)
Net income (loss)	2,377			12,590			(795		)	(11,360		)	2,812
Less: net income attributable to noncontrolling interests	—			—			435			—			435
Net income (loss) attributable to SemGroup	$	2,377		$	12,590		$	(1,230	)	$	(11,360	)	$	2,377
Net income (loss)	$	2,377		$	12,590		$	(795	)	$	(11,360	)	$	2,812
Other comprehensive loss, net of income taxes	(1,853		)	—			(13,137		)	—			(14,990		)
Comprehensive income (loss)	524			12,590			(13,932		)	(11,360		)	(12,178		)
Less: comprehensive income attributable to noncontrolling interests	—			—			435			—			435
Comprehensive income (loss) attributable to SemGroup	$	524		$	12,590		$	(14,367	)	$	(11,360	)	$	(12,613	)
Condensed Consolidating Guarantor Statements of Cash Flows
	Year Ended December 31, 2013
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by (used in) operating activities	$	20,130		$	24,642		$	148,872		$	(20,235	)	$	173,409
Cash flows from investing activities:
Capital expenditures	(734		)	(123,246		)	(91,629		)	—			(215,609		)
Proceeds from sale of long-lived assets	23			19			1,237			—			1,279
Investments in non-consolidated subsidiaries	(18,775		)	(57,850		)	(97,243		)	—			(173,868		)
Payments to acquire businesses	—			(313,487		)	(48,969		)	—			(362,456		)
Proceeds from the sale of interest in SemCrude Pipeline, L.L.C. to Rose Rock Midstream, L.P.	362,600			—			—			(362,600		)	—
Distributions in excess of equity in earnings of affiliates	—			—			12,246			—			12,246
Net cash provided by (used in) investing activities	343,114			(494,564		)	(224,358		)	(362,600		)	(738,408		)
Cash flows from financing activities:
Debt issuance costs	(10,866		)	—			(4,070		)	—			(14,936		)
Borrowings on debt	706,000			—			562,474			—			1,268,474
Principal payments on debt and other obligations	(537,500		)	—			(321,912		)	—			(859,412		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			210,226			—			210,226
Distributions to noncontrolling interests	—			—			(17,647		)	—			(17,647		)
Proceeds from warrant exercises	225			—			—			—			225
Repurchase of common stock	(371		)	—			—			—			(371		)
Dividends paid	(25,429		)	—			—			—			(25,429		)
Intercompany borrowings (advances), net	(511,881		)	469,922			(342,256		)	384,215			—
Net cash provided by (used in) financing activities	(379,822		)	469,922			86,815			384,215			561,130
Effect of exchange rate changes on cash and cash equivalents	—			—			3,191			—			3,191
Change in cash and cash equivalents	(16,578		)	—			14,520			1,380			(678		)
Cash and cash equivalents at beginning of period	19,123			—			63,844			(2,938		)	80,029
Cash and cash equivalents at end of period	$	2,545		$	—		$	78,364		$	(1,558	)	$	79,351
	Year Ended December 31, 2012
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by (used in) operating activities	$	(4,535	)	$	6,236		$	93,534		$	(15,593	)	$	79,642
Cash flows from investing activities:
Capital expenditures	(1,977		)	(59,317		)	(58,025		)	—			(119,319		)
Proceeds from sale of long-lived assets	19			(202		)	2,824			—			2,641
Investments in non-consolidated subsidiaries	(1,740		)	(74,434		)	(2,079		)	—			(78,253		)
Proceeds from the sale of non-consolidated affiliate	—			—			3,500			—			3,500
Proceeds from the sale of SemStream assets	12,250			—			—			—			12,250
Distributions in excess of equity in earnings of affiliates	9,218			—			8,072			—			17,290
Net cash provided by (used in) investing activities	17,770			(133,953		)	(45,708		)	—			(161,891		)
Cash flows from financing activities:
Debt issuance costs	(455		)	—			(252		)	—			(707		)
Borrowings on credit facilities	318,000			—			—			—			318,000
Principal payments on credit facilities and other obligations	(194,000		)	—			(28,066		)	—			(222,066		)
Distributions to noncontrolling interests	—			—			(8,502		)	—			(8,502		)
Repurchase of common stock	(242		)	—			—			—			(242		)
Intercompany borrowings (advances), net	(117,526		)	127,717			(25,608		)	15,417			—
Net cash provided by (used in) financing activities	5,777			127,717			(62,428		)	15,417			86,483
Effect of exchange rate changes on cash and cash equivalents	—			—			(610		)	—			(610		)
Change in cash and cash equivalents	19,012			—			(15,212		)	(176		)	3,624
Change in cash and cash equivalents included in discontinued operations	—			—			2,792			—			2,792
Change in cash and cash equivalents from continuing operations	19,012			—			(12,420		)	(176		)	6,416
Cash and cash equivalents at beginning of period	111			—			76,264			(2,762		)	73,613
Cash and cash equivalents at end of period	$	19,123		$	—		$	63,844		$	(2,938	)	$	80,029
	Year Ended December 31, 2011
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Net cash provided by operating activities	$	6,817		$	44,957		$	17,004		$	5,263		$	74,041
Cash flows from investing activities:
Capital expenditures	(2,080		)	(16,865		)	(47,050		)	—			(65,995		)
Proceeds from sale of long-lived assets	—			82			1,043			—			1,125
Investments in non-consolidated subsidiaries	(3,218		)	(23		)	(476		)	—			(3,717		)
Proceeds from the sale of SemStream assets	93,054			—			—			—			93,054
Proceeds from sale of limited partner interest in subsidiary, net of offering costs	127,134			—			—			(127,134		)	—
Distributions in excess of equity in earnings of affiliates	—			—			12,455			—			12,455
Net cash provided by (used in) investing activities	214,890			(16,806		)	(34,028		)	(127,134		)	36,922
Cash flows from financing activities:
Debt issuance costs	(10,867		)	—			(1,666		)	—			(12,533		)
Borrowings on credit facilities	255,471			—			8,434			—			263,905
Principal payments on credit facilities and other obligations	(498,515		)	(21		)	(4,653		)	—			(503,189		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			127,134			—			127,134
Intercompany borrowings (advances), net	25,099			(28,130		)	(116,789		)	119,820			—
Net cash provided by (used in) financing activities	(228,812		)	(28,151		)	12,460			119,820			(124,683		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(34		)	—			(34		)
Change in cash and cash equivalents	(7,105		)	—			(4,598		)	(2,051		)	(13,754		)
Change in cash and cash equivalents included in discontinued operations	—			—			(454		)	—			(454		)
Change in cash and cash equivalents from continuing operations	(7,105		)	—			(5,052		)	(2,051		)	(14,208		)
Cash and cash equivalents at beginning of period	7,216			—			81,316			(711		)	87,821
Cash and cash equivalents at end of period	$	111		$	—		$	76,264		$	(2,762	)	$	73,613

Consolidation_And_Basis_Of_Pre1

Consolidation And Basis Of Presentation Consolidation and Basis of Presentation (Policies)	12 Months Ended
	Dec. 31, 2013
Consolidation and Basis of Presentation [Abstract]	'
Consolidation, Policy [Policy Text Block]	'
	Consolidated subsidiaries
	Our consolidated financial statements include the accounts of our controlled subsidiaries, including Rose Rock. All significant transactions between our consolidated subsidiaries have been eliminated. Outside ownership interests in consolidated subsidiaries are reported as noncontrolling interests in the consolidated financial statements.
	Proportionally consolidated assets
	Our SemCAMS segment owns undivided interests in certain natural gas gathering and processing assets, for which we record only our proportionate share of the assets on the consolidated balance sheets. The net book value of the property, plant and equipment recorded by us associated with these undivided interests is approximately $206.4 million at December 31, 2013. We serve as operator of these facilities and incur the costs of operating the facilities (recorded as operating expenses in the consolidated statements of operations) and charge the other owners for their proportionate share of the costs (recorded as other revenue in the consolidated statements of operations).

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Use of Estimates	'
	USE OF ESTIMATES—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. Our significant estimates include, but are not limited to: (1) allowances for doubtful accounts receivable; (2) estimated useful lives of assets, which impact depreciation; (3) estimated fair values of long-lived assets used in impairment tests; (4) fair values of derivative instruments; and (5) accrual and disclosure of contingent losses. Although management believes these estimates are reasonable, actual results could differ materially from these estimates.
Cash And Cash Equivalents	'
	CASH AND CASH EQUIVALENTS—Cash includes currency on hand and demand and time deposits with banks or other financial institutions. Cash equivalents include highly liquid investments with maturities of three months or less at the date of purchase. Balances at financial institutions may exceed federally insured limits.
Restricted Cash	'
	RESTRICTED CASH—Our Plan of Reorganization specified the total amount of consideration we would provide to all pre-petition creditors in settlement of their claims. At December 31, 2013, we had not yet completed the process of disbursing funds to settle pre-petition claims, as we had not yet completed the process of resolving all of the claims. The restricted cash balance of $5.1 million at December 31, 2013 is primarily restricted for this purpose.
Accounts Receivable	'
	ACCOUNTS RECEIVABLE—Accounts receivable are reported net of the allowance for doubtful accounts. Our assessment of the allowance for doubtful accounts is based on several factors, including the overall creditworthiness of our customers, existing economic conditions, and the amount and age of past due accounts. We enter into netting arrangements with certain counterparties to help mitigate credit risk. Receivables subject to netting are presented as gross receivables (with the related accounts payable also presented gross) until such time as the balances are settled. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are written off against the allowance for doubtful accounts only after all collection attempts have been exhausted.
Inventories	'
	INVENTORIES—Inventories primarily consist of natural gas and natural gas liquids, crude oil, and asphalt. Inventories are valued at the lower of cost or market, with cost generally determined using the weighted-average method. The cost of inventory includes applicable transportation costs.
	We enter into exchanges with third parties whereby we acquire products that differ in location, grade, or delivery date from products we have available for sale. These exchanges are valued at cost, and although a transportation, location or product differential may be recorded, generally no gain or loss is recognized.
Property, Plant and Equipment	'
	PROPERTY, PLANT AND EQUIPMENT—Property, plant and equipment is recorded at cost. We capitalize costs that extend or increase the future economic benefits of property, plant and equipment, and expense maintenance costs that do not. When assets are disposed of, their cost and related accumulated depreciation are removed from the balance sheet, and any resulting gain or loss is recorded as a gain or loss on disposal or impairment of long-lived assets in the consolidated statements of operations.
	Our SemCAMS segment operates plants which periodically undergo planned major maintenance activities, typically occurring every four to five years.  Planned major maintenance projects that do not increase the overall life or capacity of the related assets are recorded in operating expense as incurred, whereas major maintenance activity costs that materially increase the life or capacity of the underlying assets are capitalized. When maintenance expenses are recoverable from the producers who use the plants, they are recorded as revenue, and typically include a 10% overhead fee.
	Depreciation is calculated primarily on the straight-line method over the following estimated useful lives:
	Pipelines and related facilities	10 – 31 years
	Storage and terminal facilities	10 – 25 years
	Natural gas gathering and processing facilities	10 – 31 years
	Office and other property and equipment	3 – 31 years
	Construction in process is reclassified to the fixed asset categories above and depreciation commences once the asset has been placed in-service.
Linefill	'
	LINEFILL—Pipelines and storage facilities generally require a minimum volume of product in the system to enable the system to operate. Such product, known as linefill, is generally not available to be withdrawn from the system. Linefill owned by us in facilities operated by us is recorded at historical cost, is included in property, plant and equipment in the consolidated balance sheets, and is not depreciated. We also own linefill in third-party facilities, which is included in inventory on the consolidated balance sheets.
Impairment f Long-Lived Assets	'
	IMPAIRMENT OF LONG-LIVED ASSETS—We test long-lived asset groups for impairment when events or circumstances indicate that the net book value of the asset group may not be recoverable. We test an asset group for impairment by estimating the undiscounted cash flows expected to result from its use and eventual disposition. If the estimated undiscounted cash flows are lower than the net book value of the asset group, we then estimate the fair value of the asset group and record a reduction to the net book value of the assets and a corresponding impairment loss.
Goodwil	'
	GOODWILL—We test goodwill for impairment on an annual basis, or more often if circumstances warrant, by estimating the fair value of the asset group to which the goodwill relates and comparing this fair value to the net book value of the asset group. If fair value is less than net book value, we estimate the implied fair value of goodwill, reduce the book value of the goodwill to the implied fair value, and record a corresponding impairment loss. Our policy is to test goodwill for impairment on October 1 of each year. See Note 7 for discussion of goodwill impairment.
	During September 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-08, “Testing Goodwill for Impairment”. This ASU is designed to simplify how entities test goodwill for impairment. Under the new standard, an entity may first assess qualitative factors to determine whether it is more likely than not that the fair value of an asset group is less than the carrying amount, for the purpose of determining whether it is necessary to estimate the fair value of the asset group to which the goodwill relates. We adopted this guidance on January 1, 2012. We tested goodwill for impairment on October 1st in accordance with our policy. However, we did not elect to perform the qualitative assessment for impairment testing.
Intangible Assets	'
	INTANGIBLE ASSETS—Intangible assets are stated at cost, net of accumulated amortization, which is recorded on a straight-line or accelerated basis over the life of the asset. We review amortizable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. If such a review should indicate that the carrying amount of amortizable intangible assets is not recoverable, we reduce the carrying amount of such assets to fair value.
Equity Method Investments	'
	EQUITY METHOD INVESTMENTS—We account for an investment under the equity method when we have significant influence over, but not control of, the significant operating decisions of the investee. Under the equity method, we record in the consolidated statements of operations our share of the earnings or losses of the investee, with a corresponding adjustment to the investment balance on our consolidated balance sheet. When we receive a distribution from an equity method investee, we record a corresponding reduction to the investment balance. When an equity method investee issues additional ownership interests which dilute our ownership interest, we recognize a gain or loss in our consolidated statements of operations.
	For equity method investments for which we do not expect financial information to be consistently available on a timely basis to apply the equity method currently, our policy is to apply the equity method consistently on a one-quarter lag.
Debt Issuance Costs	'
	DEBT ISSUANCE COSTS—Costs incurred in connection with the issuance of long-term debt are reported as other noncurrent assets and are amortized to interest expense using the straight-line method over the term of the related debt. Use of the straight-line method of amortization does not differ materially from the “effective interest” method.
Commodity Derivative Instruments	'
	COMMODITY DERIVATIVE INSTRUMENTS—We generally record the fair value of commodity derivative instruments on the consolidated balance sheets and the change in fair value as an increase or decrease to product revenue.
	As shown in Note 14, the fair value of commodity derivatives at December 31, 2013 and 2012 are recorded to other current assets or other current liabilities on the consolidated balance sheets. Related margin deposits are recorded to other current assets or other current liabilities on the consolidated balance sheets. Margin deposits are not generally netted against derivative assets or liabilities.
	The fair value of a derivative contract is determined based on the nature of the transaction and the market in which the transaction was executed. Quoted market prices, when available, are used to value derivative transactions. In situations where quoted market prices are not readily available, we estimate the fair value using other valuation techniques that reflect the best information available under the circumstances. Fair value measurements of derivative assets include consideration of counterparty credit risk. Fair value measurements of derivative liabilities include consideration of our creditworthiness.
	We have elected “normal purchase” and “normal sale” treatment for certain commitments to purchase or sell petroleum products at future dates. This election is only available when a transaction that would ordinarily meet the definition of a derivative but instead is expected to result in physical delivery of product over a reasonable period in the normal course of business and is not expected to be net settled. Agreements accounted for under this election are not recorded at fair value; instead, the transaction is recorded when the product is delivered.
	On January 31, 2013, the FASB issued 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.
Payables to Pre-Petition Creditors	'
	PAYABLES TO PRE-PETITION CREDITORS—Our Plan of Reorganization specified the total amount of consideration we would provide to all pre-petition creditors in settlement of their claims. At December 31, 2013, we had not yet completed the process of disbursing funds to settle pre-petition claims, as we had not yet completed the process of resolving all of the claims. We recorded a liability of $3.2 million at December 31, 2013 associated with these obligations and a liability of $0.7 million which is associated with discontinued operations and is reported within other current liabilities. Restricted cash of $5.1 million primarily relates to payables to pre-petition creditors and is held in accounts restricted for this purpose.
Contingent Losses	'
	CONTINGENT LOSSES—We record a liability for a contingent loss when it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. We record attorneys’ fees incurred in connection with a contingent loss at the time the fees are incurred. We do not record liabilities for attorneys’ fees that are expected to be incurred in the future.
Asset Retirement Obligations	'
	ASSET RETIREMENT OBLIGATIONS—Asset retirement obligations include legal or contractual obligations associated with the retirement of long-lived assets, such as requirements to incur costs to dispose of equipment or to remediate the environmental impacts of the normal operation of the assets. We record liabilities for asset retirement obligations when a known obligation exists under current law or contract and when a reasonable estimate of the value of the liability can be made.
Discontinued Operations	'
	DISCONTINUED OPERATIONS—We classify a component of our business as a discontinued operation when we commit to a plan to sell the component and believe it is probable that a sale will be completed within one year. A component that is disposed of in a manner other than by sale is classified as discontinued when the component is actually disposed. Investments accounted for under the equity method, or the cost method, do not qualify for treatment as discontinued operations. A component that is disposed of may not qualify for treatment as a discontinued operation if we have significant continuing involvement in the operations of the component after the disposal.
	Once a component meets the requirements to be classified as a discontinued operation, previous financial statements are retrospectively adjusted to reflect the component as a discontinued operation for all periods presented. Income and losses of discontinued operations (excluding corporate general and administrative expense allocations) are combined into one line on the consolidated statements of operations. The cash flows from discontinued operations are not separately identified in the consolidated statements of cash flows.
Revenue Recognition	'
	REVENUE RECOGNITION—Sales of product, as well as gathering and marketing revenues, are recognized at the time title to the product transfers to the purchaser, which typically occurs upon receipt of the product by the purchaser. Terminal and storage revenues are recognized at the time the service is performed. Revenue for the transportation of product is recognized upon delivery of the product to its destination. Certain revenue transactions are reported on a net basis, including derivative instruments considered held for trading purposes and certain buy/sell transactions (see “Purchases and Sales of Inventory with the Same Counterparty”). Other revenue primarily represents operating cost recovery from working interest owners in certain processing plants and is recorded when earned in accordance with the terms of related agreements. Taxes collected from customers and remitted to governmental authorities are recorded on a net basis (excluded from revenue).
Costs of Products Sold	'
	COSTS OF PRODUCTS SOLD—Costs of products sold consists of the cost to purchase the product, the cost to transport the product to the point of sale, and the cost to store the product until it is sold.
Purchases and Sales of Inventory With the Same Counterparty	'
	PURCHASES AND SALES OF INVENTORY WITH THE SAME COUNTERPARTY—We routinely enter into transactions to purchase inventory from, and sell inventory to, the same counterparty. Such transactions that are entered into in contemplation of one another are recorded on a net basis.
Currency Translation	'
	CURRENCY TRANSLATION—The consolidated financial statements are presented in U.S. dollars. Our segments operate in four countries, and each segment has identified a “functional currency,” which is the primary currency in the environment in which the segment operates. The functional currencies include the U.S. dollar, the Canadian dollar, the British pound sterling, and the Mexican peso.
	At the end of each reporting period, the assets and liabilities of each segment are translated from its functional currency to U.S. dollars using the exchange rate at the end of the month. The monthly results of operations of each segment are generally translated from its functional currency to U.S. dollars using the average exchange rate during the month. Changes in exchange rates result in currency translation gains and losses, which are recorded within other comprehensive income (loss).
	Certain segments also enter into transactions in currencies other than their functional currencies. At the end of each reporting period, each segment re-measures the related receivables, payables, and cash to its functional currency using the exchange rate at the end of the period. Changes in exchange rates between the time the transactions were entered into and the end of the reporting period result in currency transaction gains or losses, which are recorded in the consolidated statements of operations.
Income Taxes	'
	INCOME TAXES—Deferred income taxes are accounted for under the liability method, which takes into account the differences between the basis of the assets and liabilities for financial reporting purposes and amounts recognized for income tax purposes. We record valuation allowances on deferred tax assets when, in the opinion of management, it is more likely than not that the asset will not be recovered.
	We monitor uncertain tax positions and we recognize tax benefits only when management believes the relevant tax positions would more likely than not be sustained upon examination. We record any interest and any penalties related to income taxes within income tax expense in the consolidated statements of operations.
	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.
Reclassifications	'
	RECLASSIFICATIONS—Certain reclassifications have been made to conform prior year balances to the current year presentation.
Pension Benefits	'
	PENSION BENEFITS—Pension cost and obligations are actuarially determined and are affected by assumptions including expected return on plan assets, discount rates, compensation increases, and employee turnover rates. We evaluate our assumptions periodically and make adjustments to these assumptions and the recorded liability as necessary. Actuarial gains or losses are amortized on a straight-line basis over the expected remaining service life of employees in the pension plan.
Equity-Based Compensation	'
	EQUITY-BASED COMPENSATION—We grant certain of our employees equity-based compensation awards which vest contingent on continued service of the recipient and, in some cases, on their achievement of specific performance targets. We record compensation expense for these outstanding awards over applicable service or performance periods based on their grant date fair value with a corresponding increase to additional paid-in capital. The expense to be recorded over the life of the awards is discounted for expected forfeitures during the vesting period.
Noncontrolling interests in consolidated subsidiaries	'
	NONCONTROLLING INTERESTS IN CONSOLIDATED SUBSIDIARIES—Noncontrolling interests represents third-party limited partner unitholders' interests in 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.
Comprehensive Income	'
	COMPREHENSIVE INCOME (LOSS) AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)—Comprehensive income (loss) is defined as a change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources and includes all changes in equity during a period except those resulting from investments by owners and distributions to owners. Our comprehensive income (loss) consists of currency translation adjustments, changes in the funded status of pension benefit plans and changes in the fair value of interest rate swaps.
	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 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 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.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Schedule of Estimated Useful Lives of Property, Plant and Equipment	'
	Depreciation is calculated primarily on the straight-line method over the following estimated useful lives:
	Pipelines and related facilities	10 – 31 years
	Storage and terminal facilities	10 – 25 years
	Natural gas gathering and processing facilities	10 – 31 years
	Office and other property and equipment	3 – 31 years

Rose_Rock_Midstream_LP_Tables

Rose Rock Midstream, L.P. (Tables)	12 Months Ended
	Dec. 31, 2013
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]	'
Quarterly Target Distributions	'
	Rose Rock’s partnership agreement requires Rose Rock to distribute all of its available cash each quarter in the following manner:
		Total Quarterly Distributions										Marginal Percentage
		Per Unit Target Amount										Interest in Distributions
												Unitholders		General		Incentive
														Partner		Distribution
																Rights
	Minimum Quarterly Distributions								$	0.3625		98	%	2	%	—
	First Target Distribution	above		$	0.3625			up to	$	0.416875		98	%	2	%	—
	Second Target Distribution	above		$	0.416875			up to	$	0.453125		85	%	2	%	13	%
	Third Target Distribution	above		$	0.453125			up to	$	0.54375		75	%	2	%	23	%
	Thereafter							above	$	0.54375		50	%	2	%	48	%
Distributions Paid	'
	The following table shows the distributions paid (in thousands, except for per unit amounts):
			Record Date		Payment Date		Distribution			Distributions Paid
	Quarter Ended						Per Unit			SemGroup								Noncontrolling		Total
																		Interest		Distributions
										General		Incentive		Common		Subordinated		Common Units
										Partner		Distributions		Units		Units
	December 31, 2011	*	February 3, 2012		February 13, 2012		$	0.067	*	$	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		$	0.43		$	179	$	41	$	1,242	$	3,607	$	3,872	$	8,941
	June 30, 2013		August 5, 2013		August 14, 2013		$	0.44		$	183	$	72	$	1,271	$	3,692	$	3,962	$	9,180
	September 30, 2013		November 5, 2013		November 14, 2013		$	0.45		$	232	$	127	$	1,301	$	3,775	$	6,189	$	11,624
	December 31, 2013		February 4, 2014		February 14, 2014		$	0.465		$	257	$	244	$	2,041	$	3,901	$	6,398	$	12,841
	*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.
Summarized Balance Sheet Information	'
	Certain summarized balance sheet information of Rose Rock is shown below (in thousands):
		31-Dec-13				31-Dec-12
	Cash	$	15,459			$	108
	Other current assets	306,128				250,509
	Property, plant and equipment	311,616				291,530
	Equity method investment	224,095				—
	Goodwill	28,322				—
	Other noncurrent assets	11,627				2,579
	Total assets	$	897,247			$	544,726
	Current liabilities	$	293,031			$	231,843
	Long-term debt	245,088				4,562
	Partners’ capital attributable to SemGroup	120,610				179,187
	Partners’ capital attributable to noncontrolling interests	159,961				129,134
	Noncontrolling interest in consolidated subsidiaries retained by SemGroup	78,557				—
	Total liabilities and partners’ capital	$	897,247			$	544,726
Summarized Income Statement Information	'
	Certain summarized income statement information of Rose Rock for the years ended December 31, 2013, 2012, and 2011 is shown below (in thousands):
		Year Ended December 31, 2013				Year Ended December 31, 2012			Year Ended December 31, 2011
	Revenue	$	766,526			$	620,417		$	431,321
	Costs of products sold	$	663,759			$	546,966		$	366,265
	Operating, general and administrative expenses	$	51,082			$	35,385		$	28,816
	Depreciation and amortization expense	$	23,165			$	12,131		$	11,379
	Earnings from equity method investment	$	17,571			$	—		$	—
	Net income	$	38,005			$	23,954		$	23,235
	Noncontrolling interest in consolidated subsidiaries retained by SemGroup	$	1,256			$	—		$	—
	Net income attributable to Rose Rock Midstream, L.P.	$	36,749			$	23,954		$	23,235

Recovered_Sheet1

Investments In Non-Consolidated Subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2013
Equity Method Investments [Table Text Block]	'
	Our equity method investments consist of the following (in thousands):
		December 31, 2013			December 31, 2012
	White Cliffs	$	224,095		$	138,970
	NGL Energy	208,848			174,398
	Glass Mountain	132,181			74,434
	Total equity method investments	$	565,124		$	387,802
Cash distributions received from equity method investments [Table Text Block]	'
	Cash distributions received from equity method investments consist of the following (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	White Cliffs	$	57,576		$	44,514		$	27,459
	NGL Energy	18,321			9,217			—
	Glass Mountain	—			—			—
	Total cash distributions received from equity method investments	$	75,897		$	53,731		$	27,459
Earnings from Equity Method Investments [Table Text Block]	'
	Our earnings from equity method investments consist of the following (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	White Cliffs	$	45,459		$	36,439		$	15,004
	NGL Energy*	7,123			(403		)	—
	Glass Mountain	(105		)	—			—
	Total earnings from equity method investments	$	52,477		$	36,036		$	15,004
	* Excluding gain on issuance of common units of $26.9 million.
White Cliffs Pipeline, LLC [Member]	'
Schedule of Balance Sheet Information on Equity Method Investments	'
	Certain summarized balance sheet information of White Cliffs is shown below (in thousands):
		December 31,			December 31,
		2013			2012
	Current assets	$	98,457		$	21,508
	Property, plant and equipment, net	312,831			210,710
	Goodwill	17,000			17,000
	Other intangible assets, net	20,802			26,369
	Total assets	$	449,090		$	275,587
	Current liabilities	$	9,648		$	3,412
	Members’ equity	439,442			272,175
	Total liabilities and members’ equity	$	449,090		$	275,587
Schedule of Income Statement Information on Equity Method Investments	'
	Certain summarized income statement information of White Cliffs for the years ended December 31, 2013, 2012 and 2011 is shown below (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Revenue	$	133,310		$	108,125		$	66,097
	Operating, general and administrative expenses	$	23,825		$	14,821		$	12,746
	Depreciation and amortization expense	$	18,668		$	19,963		$	20,842
	Net income	$	90,817		$	73,341		$	32,509
Ngl Energy Partners Lp [Member]	'
Schedule of Balance Sheet Information on Equity Method Investments	'
	Certain unaudited summarized balance sheet information of NGL Energy is shown below (in thousands):
		(unaudited)			(unaudited)
		September 30,			September 30,
		2013			2012
	Current assets	$	1,013,859		$	736,297
	Property plant and equipment, net	631,663			425,641
	Goodwill	840,287			515,881
	Intangible and other assets, net	540,684			351,600
	Total assets	$	3,026,493		$	2,029,419
	Current liabilities	$	800,658		$	653,101
	Long-term debt	906,066			569,903
	Other noncurrent liabilities	2,673			2,599
	Partners’ equity	1,317,096			803,816
	Total liabilities and partners’ equity	$	3,026,493		$	2,029,419
Schedule of Income Statement Information on Equity Method Investments	'
	Certain unaudited summarized income statement information of NGL Energy for the twelve months ended September 30, 2013 and 2012 is shown below (in thousands):
		(unaudited)			(unaudited)
		Twelve Months			Twelve Months
		Ended			Ended
		September 30,			September 30,
		2013			2012
	Revenue	$	5,935,715		$	2,371,524
	Costs of products sold	$	5,478,361		$	2,182,263
	Operating, general and administrative expenses	$	276,905		$	125,889
	Depreciation and amortization expense	$	94,050		$	34,621
	Net income	$	44,378		$	5,405

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2013
Mid-America Midstream Gas Services, LLC [Member]	'
Business Acquisition [Line Items]	'
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	166,332
	Goodwill	23,839
	Total assets acquired	$	313,487
Barcas Field Services, LLC [Member]	'
Business Acquisition [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	We have received an independent appraisal of the fair value of the assets acquired in the Barcas acquisition and have recorded the following acquisition date fair values for the assets acquired (in thousands):
	Property, plant and equipment	$	13,717
	Customer contract intangible	6,930
	Goodwill	28,322
	Total assets acquired	$	48,969

Disposals_And_Impairments_of_L1

Disposals And Impairments of Long-Lived Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Disposals And Impairments Of Long-Lived Assets [Abstract]	'
Gains (Losses) Related to Disposal or Impairment of Long-Lived Assets	'
	Year Ended December 31, 2012
	Gains (losses) recorded during the year ended December 31, 2012 related to the disposal or impairment of long-lived assets included the following (in thousands):
	Event	Segment		Pre-Tax Gain
	White Cliffs settlement (a)	Crude		$	3,500
	Sale of SemStream residential division assets and liabilities (b)	SemStream		$	3,090
	(a)	We sold a portion of our ownership interest in White Cliffs during September 2010. At the time, we recorded a loss of $6.8 million on disposal of that asset. In September 2012, we reached a settlement in a dispute concerning the selling price of that ownership interest and reduced the loss by $3.5 million. This $3.5 million gain is reported in "gain on disposal or impairment of long-lived assets, net" in the consolidated statements of operations and comprehensive income (loss).
	(b)	On September 12, 2012, we entered into a definitive agreement to sell the assets and liabilities of SemStream’s Arizona residential business which was subject to regulatory approval by the Arizona Corporation Commission (the "ACC"). In early December 2012, the ACC granted SemStream regulatory approval to proceed with the sale. The sale closed on December 31, 2012 and resulted in a gain of $3.1 million on a cash sales price of $12.3 million. The $3.1 million gain is reported in "income from discontinued operations, net of income taxes" in the consolidated statement of operations and comprehensive income (loss). Property, plant, and equipment with a carrying value of $9.4 million represented the majority of assets included in the sale.
	Year Ended December 31, 2011
	Gains (losses) recorded during the year ended December 31, 2011 related to the disposal or impairment of long-lived assets included the following (in thousands):
	Event	Segment		Pre-Tax Gain
				(Loss)
	Contribution of SemStream assets to NGL Energy (a)	SemStream		$	44,266
	SemStream residential division impairment (b)	SemStream		$	(8,684	)
	SemLogistics goodwill impairment (c)	SemLogistics		$	(44,663	)
	(a)	On November 1, 2011, we contributed certain assets and liabilities of our SemStream segment to NGL Energy. On that date these assets and liabilities had the net book values (in thousands) below. However, these values were subject to post closing adjustments, which have since been completed, and resulted in a $2.1 million working capital adjustment.
	Inventory	$	107,858
	Other current assets	11,263
	Property plant and equipment	47,756
	Goodwill	50,071
	Other intangible assets	12,408
	Other noncurrent assets	2,818
	Other current liabilities	(2,947		)
	Other noncurrent liabilities	(172		)
	Net assets contributed	$	229,055
	In return for this contribution, we received $93.0 million of cash and ownership interests in NGL Energy and its general partner with an estimated fair value of $184.0 million. We recorded a gain of $44.3 million on this transaction, which includes the impact of a $2.1 million working capital adjustment and the write-off of $1.6 million of software. Additionally, $2.2 million of capitalized loan fees were written-off as a result of long-term debt payments made from the proceeds of this transaction.
	(b)	We test all of our goodwill for impairment as of October 1 of each year. Upon completing this impairment test for 2011, we concluded that the goodwill and other intangible assets attributable to the Arizona residential business of our SemStream segment (which was not contributed to NGL Energy) were impaired. To calculate the impairment loss, we estimated the fair value of this reporting unit using the present value of estimated future cash flows, discounted at a rate of 9.4%, and recorded a full impairment of the $3.6 million balance of goodwill and the $5.0 million balance of other intangible assets associated with customer relationships. No impairment was recorded related to the regulated assets of the Arizona residential business in accordance with ASC 980, "Regulated Operations".
	(c)	High crude oil prices and backwardated market conditions in 2011 had a negative effect on SemLogistic’s storage economics. As a result, the demand for storage is depressed and SemLogistics has had difficulty securing contract renewals. SemLogistics successfully passed the initial 2011 goodwill impairment test. However, a review of the sensitivity of the test results indicated that a ten percent reduction in the estimated revenue in 2012 and 2013 would result in a test failure. In addition, we received notice in late January 2012 from two customers that their intentions were not to renew their storage contracts upon expiration. These notifications, coupled with the sensitivity of the test results to loss of revenue, led us to conclude that impairment of the goodwill of SemLogistics was required. Accordingly, we impaired the full amount of goodwill which was $44.7 million at October 1, 2011.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Summarized Information on Results of Discontinued Operations	'
	Certain summarized information on the results of discontinued operations is shown below (in thousands):
		Year Ended December 31, 2013		Year Ended December 31, 2012			Year Ended December 31, 2011
	External revenue	$	—	$	13,518		$	14,264
	Gain (loss) on disposal of long-lived assets, net	$	—	$	3,090		$	(9,196	)
	Income (loss) from discontinued operations before income taxes	$	59	$	2,935		$	(9,652	)
	Income tax expense (benefit)	—		(4		)	(104		)
	Income (loss) from discontinued operations, net of income taxes	$	59	$	2,939		$	(9,548	)

Segments_Tables

Segments (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information	'
		Year Ended December 31, 2013
		Crude			SemStream			SemCAMS			SemGas			SemLogistics			SemMexico			Corporate			Consolidated
																				and
																				Other
		(in thousands)
	Revenues:
	External	$	767,202		$	—		$	198,450		$	207,134		$	11,671		$	242,559		$	—		$	1,427,016
	Intersegment	—			—			—			23,985			—			—			(23,985		)	—
	Total revenues	767,202			—			198,450			231,119			11,671			242,559			(23,985		)	1,427,016
	Expenses:
	Costs of products sold, exclusive of depreciation and amortization shown below	663,759			—			305			169,800			380			209,841			(23,985		)	1,020,100
	Operating	36,242			1			150,319			20,200			7,444			9,379			—			223,585
	General and administrative	16,766			600			14,940			7,971			5,854			10,700			21,766			78,597
	Depreciation and amortization	23,708			—			10,766			14,517			9,426			5,991			2,001			66,409
	Loss (gain) on disposal or impairment of long-lived assets, net	(56		)	6			—			665			—			(854		)	—			(239		)
	Total expenses	740,419			607			176,330			213,153			23,104			235,057			(218		)	1,388,452
	Earnings from equity method investments	45,354			7,123			—			—			—			—			—			52,477
	Gain on issuance of common units by equity method investee	—			26,873			—			—			—			—			—			26,873
	Operating income (loss)	72,137			33,389			22,120			17,966			(11,433		)	7,502			(23,767		)	117,914
	Other expenses (income), net
	Interest expense (income)	14,923			(4,810		)	18,928			3,268			1,435			188			(8,790		)	25,142
	Other expense (income), net	(14		)	128			(20		)	(3		)	(400		)	(652		)	45,234			44,273
	Total other expenses (income)	14,909			(4,682		)	18,908			3,265			1,035			(464		)	36,444			69,415
	Income (loss) from continuing operations before income taxes	$	57,228		$	38,071		$	3,212		$	14,701		$	(12,468	)	$	7,966		$	(60,211	)	$	48,499
	Additions to long-lived assets	$	66,995		$	—		$	56,122		$	97,021		$	2,071		$	6,375		$	734		$	229,318
	Total assets at December 31, 2013 (excluding intersegment receivables)	$	1,070,484		$	208,847		$	306,001		$	552,095		$	168,835		$	104,154		$	60,198		$	2,470,614
	Equity investments at December 31, 2013	$	356,276		$	208,848		$	—		$	—		$	—		$	—		$	—		$	565,124
		Year Ended December 31, 2012
		Crude			SemStream			SemCAMS			SemGas			SemLogistics			SemMexico			Corporate			Consolidated
																				and
																				Other
		(in thousands)
	Revenues:
	External	$	620,797		$	7		$	223,219		$	117,264		$	12,341		$	263,870		$	(1	)	$	1,237,497
	Intersegment	—			—			—			10,606			—			—			(10,606		)	—
	Total revenues	620,797			7			223,219			127,870			12,341			263,870			(10,607		)	1,237,497
	Expenses:
	Costs of products sold, exclusive of depreciation and amortization shown below	546,966			33			768			100,677			196			236,851			(10,606		)	874,885
	Operating	24,143			(37		)	174,284			12,712			5,921			7,677			—			224,700
	General and administrative	13,321			930			14,020			6,195			5,652			9,433			22,367			71,918
	Depreciation and amortization	12,131			—			10,589			7,043			9,780			6,171			2,496			48,210
	Loss (gain) on disposal or impairment of long-lived assets, net	(3,501		)	214			—			46			—			(290		)	—			(3,531		)
	Total expenses	593,060			1,140			199,661			126,673			21,549			259,842			14,257			1,216,182
	Earnings from equity method investments	36,439			(403		)	—			—			—			—			—			36,036
	Operating income (loss)	64,176			(1,536		)	23,558			1,197			(9,208		)	4,028			(24,864		)	57,351
	Other expenses (income), net
	Interest expense (income)	(409		)	(3,449		)	18,727			1,461			2,486			314			(10,228		)	8,902
	Other expense (income), net	31			(21		)	14			—			(420		)	(38		)	22,003			21,569
	Total other expenses (income)	(378		)	(3,470		)	18,741			1,461			2,066			276			11,775			30,471
	Income (loss) from continuing operations before income taxes	$	64,554		$	1,934		$	4,817		$	(264	)	$	(11,274	)	$	3,752		$	(36,639	)	$	26,880
	Additions to long-lived assets	$	41,364		$	—		$	13,340		$	47,140		$	1,188		$	3,396		$	14,827		$	121,255
	Total assets at December 31, 2012 (excluding intersegment receivables)	$	771,140		$	175,028		$	302,143		$	133,864		$	174,218		$	94,594		$	97,192		$	1,748,179
	Equity investments at December 31, 2012	$	213,404		$	174,398		$	—		$	—		$	—		$	—		$	—		$	387,802
		Year Ended December 31, 2011
		Crude			SemStream			SemCAMS			SemGas			SemLogistics			SemMexico			Corporate			Consolidated
																				and
																				Other
		(in thousands)
	Revenues:
	External	$	431,321		$	561,596		$	163,367		$	66,660		$	23,314		$	218,187		$	801		$	1,465,246
	Intersegment	—			46,738			—			38,588			—			—			(85,326		)	—
	Total revenues	431,321			608,334			163,367			105,248			23,314			218,187			(84,525		)	1,465,246
	Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	366,265			595,434			218			75,066			152			192,068			(84,764		)	1,144,439
Operating	17,470			6,448			110,814			9,027			6,206			5,006			70			155,041
General and administrative	9,757			7,336			16,816			6,521			6,712			11,560			16,745			75,447
Depreciation and amortization	11,379			3,501			10,233			5,986			9,271			6,502			2,951			49,823
Loss (gain) on disposal or impairment of long-lived assets, net	64			(45,821		)	(8		)	4			44,663			(200		)	1,599			301
Total expenses	404,935			566,898			138,073			96,604			67,004			214,936			(63,399		)	1,425,051
Earnings from equity method investments	15,004			—			—			—			—			—			—			15,004
Operating income (loss)	41,390			41,436			25,294			8,644			(43,690		)	3,251			(21,126		)	55,199
Other expenses (income):
Interest expense	3,749			17,152			24,685			2,346			1,005			365			10,836			60,138
Other expense (income), net	(1,600		)	(2,112		)	(2,811		)	(10		)	46			(173		)	(8,329		)	(14,989		)
Total other expenses	2,149			15,040			21,874			2,336			1,051			192			2,507			45,149
Income (loss) from continuing operations before income taxes	$	39,241		$	26,396		$	3,420		$	6,308		$	(44,741	)	$	3,059		$	(23,633	)	$	10,050
Additions to long-lived assets	$	32,397		$	2,197		$	4,874		$	14,952		$	5,313		$	4,667		$	2,080		$	66,480
Schedule of Segment Reporting Information by Segment Income Tax Expense (Benefit)	'
	Income tax expense (benefit) relates to the following segments (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	SemCAMS	$	6,348		$	720		$	552
	SemLogistics	(5,699		)	(7,736		)	(3,331		)
	SemMexico	2,589			2,285			629
	Corporate and other	(20,492		)	2,653			(160		)
	Total	$	(17,254	)	$	(2,078	)	$	(2,310	)

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Components Of Inventories	'
	Inventories consist of the following (in thousands):
		December 31,		December 31,
		2013		2012
	Crude oil	$	30,779	$	24,840
	Asphalt and other	13,516		9,593
	Total inventories	$	44,295	$	34,433

Other_Assets_Tables

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Other Assets [Abstract]	'
Other current assets	'
	Other current assets consist of the following (in thousands):
		December 31,			December 31,
		2013			2012
	Product prepayments	$	779		$	1,550
	Other prepaid expenses	4,917			13,593
	Margin deposits	838			1,850
	Deferred tax asset	7,325			875
	Other	152			648
	Total other current assets	$	14,011		$	18,516
Other noncurrent assets	'
	Other noncurrent assets consist of the following (in thousands):
		December 31,			December 31,
		2013			2012
	Debt issuance costs, net	$	17,149	*	$	4,945	*
	Deferred tax asset	2,832			—
	Other	8,908			3,236
	Total other noncurrent assets, net	$	28,889		$	8,181
	* See Note 16 for discussion of debt issuance costs.

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Schedule Of Property, Plant And Equipment	'
	Property, plant and equipment consists of the following (in thousands):
		December 31,			December 31,
		2013			2012
	Land	$	72,484		$	53,491
	Pipelines and related facilities	312,730			206,345
	Storage and terminal facilities	281,819			268,738
	Natural gas gathering and processing facilities	347,962			280,750
	Linefill	14,701			13,158
	Office and other property and equipment	65,679			47,679
	Construction-in-progress	199,073			75,449
	Property, plant and equipment, gross	1,294,448			945,610
	Accumulated depreciation	(188,720		)	(130,886		)
	Property, plant and equipment, net	$	1,105,728		$	814,724

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill And Other Intangible Assets [Abstract]	'
Goodwill by Segment	'
	Goodwill relates to the following segment (in thousands):
		December 31,			December 31,
		2013			2012
	Crude	$	28,322		$	—
	SemGas	23,839			—
	SemMexico	9,860			9,884
	Total Goodwill	$	62,021		$	9,884
Reconciliation of Goodwill	'
	Changes in goodwill balances during the period from December 31, 2010 to December 31, 2013 are shown below (in thousands):
	Balance, December 31, 2010	$	107,823
	Impairments (Note 7)	(47,804		)
	Contribution of SemStream assets to NGL Energy (Note 7)	(50,071		)
	Currency translation adjustments	(495		)
	Balance, December 31, 2011	9,453
	Currency translation adjustments	431
	Balance, December 31, 2012	9,884
	Barcas acquisition (Note 6)	28,322
	MMGS acquisition (Note 6)	23,839
	Currency translation adjustments	(24		)
	Balance, December 31, 2013	$	62,021
Other Intangible Assets by Segment	'
	Other intangible assets relate to the following segments (in thousands):
		December 31,			December 31,
		2013			2012
	Crude	$	5,775		$	—
	SemGas	163,144			—
	SemMexico	5,888			7,549
	Corporate and other	31			36
	Total other intangible assets	$	174,838		$	7,585
Reconciliation of Other Intangible Assets	'
	Changes in other intangible asset balances are shown below (in thousands):
	Balance, December 31, 2010	$	32,264
	Amortization	(4,664		)
	Impairment (Note 7)	(5,048		)
	Contribution of SemStream assets to NGL Energy (Note 7)	(12,408		)
	Currency translation adjustments	(1,194		)
	Balance, December 31, 2011	8,950
	Amortization	(2,017		)
	Currency translation adjustments	652
	Balance, December 31, 2012	7,585
	Amortization	(6,018		)
	Barcas acquisition (Note 6)	6,930
	MMGS acquisition (Note 6)	166,332
	Currency translation adjustments	9
	Balance, December 31, 2013	$	174,838
Future Amortization of Other Intangible Assets	'
	We estimate that future amortization of other intangible assets will be as follows (in thousands):
	For year ending:
	31-Dec-14	$	13,113
	31-Dec-15	11,687
	31-Dec-16	9,164
	31-Dec-17	8,996
	December 31, 2018	8,863
	Thereafter	123,015
	Total estimated amortization expense	$	174,838

Financial_Instruments_and_Conc1

Financial Instruments and Concentrations of Risk (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Assets and Liabilities	'
	The tables below summarize the balances of these assets and liabilities at December 31, 2013 and 2012 (in thousands):
		December 31, 2013												December 31, 2012
		Level 1				Netting*				Total				Level 1			Netting*			Total
	Assets:
	Commodity derivatives	$	36			$	(36	)		$	—			$	22		$	(22	)	$	—
	Total assets	$	36			$	(36	)		$	—			$	22		$	(22	)	$	—
	Liabilities:
	Commodity derivatives	$	96			$	(36	)		$	60			$	1,056		$	(22	)	$	1,034
	Warrants	58,134				—				58,134				32,858			—			32,858
	Total liabilities	$	58,230			$	(36	)		$	58,194			$	33,914		$	(22	)	$	33,892
	Net assets (liabilities) at fair value	$	(58,194	)		$	—			$	(58,194	)		$	(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	'
	The following table summarizes changes in the fair value of our net financial assets (liabilities) classified as Level 3 in the fair value hierarchy (in thousands):
		Year Ended December 31, 2013												Year Ended December 31, 2012									Year Ended December 31, 2011
		Warrants				Commodity				Total				Warrants			Commodity			Total			Warrants			Commodity			Total
						Derivatives											Derivatives									Derivatives
	Net assets (liabilities)—beginning balance	$	—			$	—			$	—			$	—		$	—		$	—		$	(17,192	)	$	(547	)	$	(17,739	)
	Transfers out of Level 3(*)	—				—				—				—			—			—			8,934			(419		)	8,515
	Total realized and unrealized gain (loss) included in earnings(**)	—				—				—				—			—			—			8,258			2,783			11,041
	Settlements	—				—				—				—			—			—			—			(1,817		)	(1,817		)
	Net assets (liabilities)—ending balance	$	—			$	—			$	—			$	—		$	—		$	—		$	—		$	—		$	—
	Amount of total gain or loss included in earnings for the period attributable to the change in unrealized gain or loss relating to assets and liabilities still held at the reporting date	$	—			$	—			$	—			$	—		$	—		$	—		$	—		$	—		$	—
	(*)	In these tables, transfers in and transfers out are recognized as of the beginning of the reporting period for commodity derivatives and as of the transfer date for warrants.
	(**)	Gains and losses related to commodity derivatives are reported in product revenue. Gains and losses related to warrants are recorded in other expense (income).
Schedule of Notional Quantities for Commodity Derivative Instruments	'
	The following table sets forth the notional quantities for derivative instruments entered into (in thousands of barrels):
		Year Ended December 31, 2013			Year Ended December 31, 2012
	Sales	2,595			1,743
	Purchases	2,575			1,636
Schedule of Not Designated Commodity Derivative Instruments Fair Value on Condensed Consolidated Balance Sheets	'
	We record the fair value of our commodity derivative instruments on our consolidated balance sheets in other current assets and other current liabilities in the following amounts (in thousands):
	December 31, 2013								December 31, 2012
	Other Current Assets				Other Current Liabilities				Other Current Assets				Other Current Liabilities
	$	—			$	60			$	—			$	1,034
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):
	Year Ended December 31, 2013				Year Ended December 31, 2012				Year Ended December 31, 2011
	$	(1,593	)		$	149			$	2,153
Schedule of Assets and Liabilities Excluding from Affiliate Balance Sheet	'
	The following table summarizes the assets and liabilities (excluding affiliate balances) at December 31, 2013 of our subsidiaries outside the United States (in thousands):
		Canada				United				Mexico				Total
						Kingdom
	Cash and cash equivalents	$	49,221			$	1,845			$	11,862			$	62,928
	Other current assets	59,472				2,896				45,751				108,119
	Noncurrent assets	212,567				164,094				46,541				423,202
	Total assets	$	321,260			$	168,835			$	104,154			$	594,249
	Current liabilities	$	51,124			$	1,788			$	27,450			$	80,362
	Noncurrent liabilities	70,392				21,826				1,865				94,083
	Total liabilities	121,516				23,614				29,315				174,445
	Net assets	$	199,744			$	145,221			$	74,839			$	419,804

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Consolidated Income (Loss) From Continuing Operations	'
	Our consolidated income from continuing operations before income taxes was generated in the following jurisdictions (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	U.S.	$	40,002		$	21,498		$	39,936
	Foreign	8,497			5,382			(29,886		)
	Consolidated	$	48,499		$	26,880		$	10,050
Summary of Income Tax Expense (Benefit)	'
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	U.S.	$	40,002		$	21,498		$	39,936
	Foreign	8,497			5,382			(29,886		)
	Consolidated	$	48,499		$	26,880		$	10,050
	The following table summarizes income tax benefit from continuing operations by jurisdiction (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Current income tax provision:
	Foreign	$	15,546		$	9,662		$	7,427
	U.S. federal	2,067			—			—
	U.S. state	1,435			74			4
		19,048			9,736			7,431
	Deferred income tax provision (benefit):
	Foreign	(10,222		)	(12,070		)	(7,252		)
	U.S. federal	(23,756		)	222			(2,159		)
	U.S. state	(2,324		)	34			(330		)
		(36,302		)	(11,814		)	(9,741		)
	Benefit for income taxes	$	(17,254	)	$	(2,078	)	$	(2,310	)
Reconciliation of Income Tax Provision (Benefit)	'
	The following table reconciles income tax benefit at the U.S. federal statutory rate to the consolidated benefit for income taxes (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Income from continuing operations before income taxes	$	48,499		$	26,880		$	10,050
	U.S. federal statutory rate	35		%	35		%	35		%
	Provision at statutory rate	16,975			9,408			3,518
	State income taxes—net of federal benefit	(577		)	71			(221		)
	Effect of rates other than statutory	(1,041		)	(829		)	(1,360		)
	Effect of U.S. taxation on foreign branches	2,974			1,883			(10,460		)
	Foreign tax adjustment, prior years	4,533			—			—
	Impairment of goodwill	—			—			15,745
	Warrants	24,625			—			—
	Noncontrolling interest	(6,096		)	(3,429		)	—
	Foreign tax credit and offset to branch deferreds	(2,876		)	(12,360		)	9,339
	Impact of valuation allowance on deferred tax assets	(53,218		)	6,233			(16,421		)
	Other, net	(2,553		)	(3,055		)	(2,450		)
	Benefit for income taxes	$	(17,254	)	$	(2,078	)	$	(2,310	)
Significant Components of Deferred Tax Assets and Liabilities	'
	Significant components of deferred tax assets and liabilities are as follows at December 31, 2013 and 2012 (in thousands):
		December 31,			December 31,
		2013			2012
	Deferred tax assets:
	Net operating loss and other credit carryforwards	$	9,498		$	47,910
	Compensation and benefits	7,991			1,573
	Inventories	118			96
	Intangible assets	44,444			52,444
	Pension plan	2,849			3,384
	Allowance for doubtful accounts	2,140			2,507
	Deferred revenue	5,910			3,925
	Foreign tax credit and offset to branch deferreds	95,435			92,559
	Other	8,243			16,046
	less: valuation allowance	(95,438		)	(155,757		)
	Net deferred tax assets	81,190			64,687
	Deferred tax liabilities:
	Intangible assets	(6,927		)	(8,952		)
	Prepaid expenses	(153		)	(150		)
	Property, plant and equipment	(113,030		)	(78,413		)
	Equity investment in partnerships	(49,720		)	(36,749		)
	Other	(1,471		)	(5,876		)
	Total deferred tax liabilities	(171,301		)	(130,140		)
	Net deferred tax liabilities	$	(90,111	)	$	(65,453	)

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Summary of Long-Term Debt	'
	Our long-term debt consisted of the following (in thousands):
		December 31,		December 31,
		2013		2012
	SemGroup 7.50% senior unsecured notes	$	300,000	$	—
	SemGroup corporate revolving credit facility	70,000		201,500
	Rose Rock credit facility	245,000		4,500
	SemLogistics credit facility	—		—
	SemMexico credit facility	—		—
	Capital leases	125		86
	Total long-term debt	615,125		206,086
	less: current portion of long-term debt	37		24
	Noncurrent portion of long-term debt	$	615,088	$	206,062
Early Redemption Premium Percentages [Table Text Block]	'
	Year		Percentage
	2016		105.62%
	2017		103.75%
	2018		101.88%
	2019 and thereafter		100.00%
Scheduled Principal Payments of Debt	'
	The following table summarizes the scheduled principal payments as of December 31, 2013 (in thousands). As described above, our credit agreements require accelerated principal payments under certain circumstances. As a result, principal payments may occur earlier than shown in the table below.
		7.50% Senior Unsecured Notes		SemGroup		Rose Rock		SemMexico		Capital		Total
				Facility		Facility		Facility		Leases
	For the year ended:
	31-Dec-14	$	—	$	—	$	—	$	—	$	37	$	37
	31-Dec-15	—		—		—		—		39		39
	31-Dec-16	—		—		—		—		21		21
	31-Dec-17	—		—		—		—		15		15
	31-Dec-18	—		70,000		245,000		—		13		315,013
	Thereafter	300,000		—		—		—		—		300,000
	Total	$	300,000	$	70,000	$	245,000	$	—	$	125	$	615,125

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Summary of Changes in Asset Retirement Obligations	'
	The following table summarizes the changes in this liability from December 31, 2010 through December 31, 2013 (in thousands):
	Balance at December 31, 2010	$	32,884
	Accretion	4,114
	Payments made	(341		)
	Currency translation adjustments	(771		)
	Balance at December 31, 2011	35,886
	Accretion	4,554
	Payments made	(1,169		)
	Currency translation adjustments	834
	Balance at December 31, 2012	40,105
	Accretion	4,752
	Payments made	(808		)
	Currency translation adjustments	(2,864		)
	Balance at December 31, 2013	$	41,185
Schedule of Future Minimum Lease Payments	'
	Future minimum payments required under operating leases that have initial or remaining non-cancellable lease terms in excess of one year at December 31, 2013 are as follows (in thousands):
	For year ending:
	31-Dec-14	$	8,618
	31-Dec-15	8,890
	31-Dec-16	8,752
	31-Dec-17	6,737
	31-Dec-18	2,785
	Thereafter	6,213
	Total future minimum lease payments	$	41,995
Summary of Purchase and Sale Commitments	'
	At December 31, 2013, such commitments included the following (in thousands):
		Volume			Value
		(barrels)
	Fixed price purchases	337			$	30,767
	Fixed price sales	397			$	38,311
	Floating price purchases	14,610			$	1,432,982
	Floating price sales	15,785			$	1,458,312

Equity_Tables

Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Schedule of common stock reflected on the consolidated balance sheet	'
	The shares of common stock reflected on the consolidated balance sheet at December 31, 2013 are summarized below:
	Shares issued on Emergence Date	40,882,496
	Shares subsequently issued in settlement of pre-petition claims	228,309
	Remaining shares required to be issued in settlement of pre-petition claims	289,191
	Issuance of shares under employee and director compensation programs (*)	691,570
	Shares issued upon exercise of warrants (**)	441,325
	Total shares	42,532,891
	Par value per share	$	0.01
	Common stock on December 31, 2013 balance sheet (in thousands)	$	425
	(*) These shares include 107,988 shares which vested during the year ended December 31, 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 consolidated balance sheet.
Schedule of warrants reflected on the consolidated balance sheet	'
	The warrants reflected on the consolidated balance sheet at December 31, 2013 are summarized below:
	Warrants issued on Emergence Date	1,634,210
	Warrants subsequently issued in settlement of pre-petition claims	240,310
	Remaining warrants to be issued in settlement of pre-petition claims	304,427
	Warrants exercised	(818,124		)
	Total warrants at December 31, 2013	1,360,823
	Fair value per warrant at December 31, 2013	$	42.72
	Warrant liability on December 31, 2013 consolidated balance sheet (in thousands)	$	58,134

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Basic earnings per share	'
	The following summarizes the calculation of basic earnings per share for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share amounts):
		Year Ended December 31, 2013
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	65,753	$	59		$	65,812
	less: Income attributable to noncontrolling interest	17,710		—			17,710
	Numerator	$	48,043	$	59		$	48,102
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercises	939		939			939
	Denominator	42,339		42,339			42,339
	Basic earnings per share	$	1.13	$	0		$	1.14
		Year Ended December 31, 2012
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	28,958	$	2,939		$	31,897
	less: Income attributable to noncontrolling interest	9,797		—			9,797
	Numerator	$	19,161	$	2,939		$	22,100
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercises	539		539			539
	Denominator	41,939		41,939			41,939
	Basic earnings per share	$	0.46	$	0.07		$	0.53
		Year Ended December 31, 2011
		Continuing		Discontinued			Net
		Operations		Operations
	Income (loss)	$	12,360	$	(9,548	)	$	2,812
	less: Income attributable to noncontrolling interest	435		—			435
	Numerator	$	11,925	$	(9,548	)	$	2,377
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans	240		240			240
	Denominator	41,640		41,640			41,640
	Basic earnings (loss) per share	$	0.29	$	(0.23	)	$	0.06
Diluted earnings per share	'
	The following summarizes the calculation of diluted earnings per share for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share amounts):
		Year Ended December 31, 2013
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	65,753	$	59		$	65,812
	less: Income attributable to noncontrolling interest	17,710		—			17,710
	Numerator	$	48,043	$	59		$	48,102
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercise	939		939			939
	Effect of dilutive securities	307		307			307
	Denominator	42,646		42,646			42,646
	Diluted earnings per share	$	1.13	$	0		$	1.13
		Year Ended December 31, 2012
		Continuing		Discontinued			Net
		Operations		Operations
	Income	$	28,958	$	2,939		$	31,897
	less: Income attributable to noncontrolling interest	9,797		—			9,797
	Numerator	$	19,161	$	2,939		$	22,100
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans and warrant exercises	539		539			539
	Effect of dilutive securities	315		315			315
	Denominator	42,254		42,254			42,254
	Diluted earnings per share	$	0.45	$	0.07		$	0.52
		Year Ended December 31, 2011
		Continuing		Discontinued			Net
		Operations		Operations
	Income (loss)	$	12,360	$	(9,548	)	$	2,812
	less: Income attributable to noncontrolling interest	435		—			435
	less: Income resulting from change in fair value of warrants	5,012		—			5,012
	Numerator	$	6,913	$	(9,548	)	$	(2,635	)
	Common stock issued and to be issued pursuant to Plan of Reorganization	41,400		41,400			41,400
	Weighted average common stock outstanding issued under compensation plans	240		240			240
	Denominator	41,640		41,640			41,640
	Diluted earnings (loss) per share	$	0.17	$	(0.23	)	$	(0.06	)

EquityBased_Compensation_Table

Equity-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule of unvested share activity	'
	The activity related to these awards is summarized below:
		Unvested			Average
		Shares			Grant Date
					Fair Value(*)
	Outstanding at December 31, 2010	502,902			$	25
	Awards granted - 2011 (**)	173,982			$	28.9
	Awards vested - 2011	(201,361	)		$	25
	Awards forfeited - 2011	(65,017	)		$	25.36
	Outstanding at December 31, 2011	410,506			$	26.59
	Awards granted - 2012 (**)	246,432			$	27.81
	Awards vested - 2012	(162,986	)		$	25.2
	Award forfeited - 2012	(43,400	)		$	27.74
	Outstanding at December 31, 2012	450,552			$	26.87
	Awards granted - 2013 (**)	201,451			$	52.78
	Awards vested - 2013	(107,988	)		$	25.71
	Award forfeited - 2013	(13,412	)		$	32.36
	Outstanding at December 31, 2013	530,603			$	36.8
	(*)	The grant date fair value of awards issued prior to our listing on the New York Stock Exchange was estimated at $25 per share, which was the per share reorganization value of the Company. Subsequent to our listing, the grant date fair value is determined based on the closing price on the New York Stock Exchange on the date of issue.
	(**)	For certain of the awards granted in 2013, 2012 and 2011, the number of shares that will vest is contingent upon our achievement of certain specified targets. Awards with performance conditions are valued based on the grant date closing price on the New York Stock Exchange assuming that 100% of the awards will vest. Awards with market conditions are valued using Monte Carlo simulations. Market awards issued in 2013 were valued using blended volatility of 28.9%, comprised of 50% historical volatility and 50% implied volatility and a risk-free rate based on the three-year United States Treasury spot rate on the grant date. If we meet the specified maximum targets, approximately 74 thousand, 41 thousand and 26 thousand additional shares could vest related to the 2013, 2012 and 2011 awards, respectively.
Summary of scheduled vesting of awards Granted	'
	The following table, which includes potential shares from specified targets, assuming maximum achievement (as discussed above), summarizes the scheduled vesting of awards that have been granted as of December 31, 2013:
	Year ended December 31, 2014	165,980		shares
	Year ended December 31, 2015	244,912		shares
	Year ended December 31, 2016	260,898		shares
Rose Rock equity incentive plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule of unvested share activity	'
		Unvested Units			Average Grant Date Fair Value
	Outstanding at December 31, 2011	—			$	—
	Awards granted - 2012	46,069			$	21.97
	Awards vested - 2012	—			$	—
	Awards forfeited - 2012	(2,109	)		$	20.6
	Outstanding at December 31, 2012	43,960			$	21.91
	Awards granted - 2013	49,104			$	34.41
	Awards vested - 2013	(9,333	)		$	27.25
	Awards forfeited - 2013	(783	)		$	34.4
	Outstanding at December 31, 2013	82,948			$	28.59
Summary of scheduled vesting of awards Granted	'
	he following table summarizes the scheduled vesting of awards that have been granted as of December 31, 2013:
	Year ended December 31, 2014	5,712		common units
	Year ended December 31, 2015	34,627		common units
	Year ended December 31, 2016	42,609		common units
	Expense of $0.8 million and $0.3 million related to these awards was recorded for the years ended December 31, 2013 and 2012, respectively, and represents an increase in noncontrolling interests in consolidated subsidiaries.  As of December 31, 2013, there was $1.5 million of total unrecognized compensation cost related to the nonvested awards, which is expected to be recognized over a weighted-average period of 19 months.
	The holders of certain of these restricted unit awards granted prior to 2013 are entitled to equivalent distributions (“Unvested Unit Distributions” or “UUD’s”) to be received upon vesting of the restricted unit awards. The distributions will be settled in common units based on the market price of Rose Rock's limited partner common units as of the close of business on the vesting date. The UUD’s are subject to the same forfeiture and acceleration conditions as the associated restricted units. For the year ended December 31, 2013, 406 UUDs were issued upon the vesting of these restricted units. At December 31, 2013, the value of the UUD’s was approximately $101 thousand. This is equivalent to approximately 2,617 common units based on the year end close of business market price of Rose Rock's common units of $38.70 per unit. Holders of restricted units granted in 2013 are entitled to received distributions made during the vesting period in cash upon vesting.

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Weighted Average Discount Rate [Line Items]	'
Projected benefit obligations and plan assets of the pension plans	'
	The following table shows the projected benefit obligations and plan assets of the Pension Plans (in thousands):
		December 31,				December 31,
		2013				2012
	Change in projected benefit obligation:
	Projected benefit obligation at beginning of year	$	28,357			$	26,767
	Service cost	577				596
	Interest cost	1,047				1,134
	Actuarial (gains) losses	(3,022		)		1,436
	Benefits paid	(968		)		(2,193		)
	Currency translation adjustment	(1,955		)		617
	Projected benefit obligation at end of year	24,036				28,357
	Change in fair value of plan assets:
	Fair value of plan assets at beginning of year	22,727				21,008
	Employer contributions	1,144				1,297
	Actual return on plan assets	4,397				2,123
	Benefits paid	(968		)		(2,193		)
	Currency translation adjustment	(1,718		)		492
	Fair value of plan assets at end of year	25,582				22,727
	Funded status:	$	1,546			$	(5,630	)
	Accumulated benefit obligation at end of year	$	22,687			$	26,725
Components of the net periodic benefit cost related to the pension plans	'
	The following table summarizes the components of the net periodic benefit cost related to the Pension Plans (in thousands):
		Year Ended December 31, 2013				Year Ended December 31, 2012				Year Ended December 31, 2011
	Service cost	$	577			$	596			$	742
	Interest cost	1,047				1,134				1,494
	Expected return on plan assets	(1,298		)		(1,263		)		(1,585		)
	Settlement loss	—				(55		)		703
	Other	186				118				—
	Net periodic benefit cost	$	512			$	530			$	1,354
Estimate of benefit payments from the pension plans	'
	We estimate that benefit payments from the Pension Plans will be as follows for the years 2014 – 2023 (in thousands):
	Year		Estimated
			Benefit Payments
	2014		$	1,636
	2015		$	1,826
	2016		$	1,999
	2017		$	2,039
	2018		$	1,808
	2019 - 2023		$	8,732
Target allocation of plan assets	'
	The following table shows the value of each category of plan assets at December 31, 2013 and 2012 and the target investment allocation under our investment policy at December 31, 2013:
		Asset Value at				Asset Value at				Actual			Normal			Minimum			Maximum
		December 31,				December 31,				Allocation at			Allocation			Allocation			Allocation
		2013				2012				December 31,			Per			Per			Per
		(in thousands)				(in thousands)				2013			Investment			Investment			Investment
													Policy			Policy			Policy
	Cash and cash equivalents	$	171			$	—			0.7	%		—	%		0	%		10	%
	Pooled funds—fixed income	8,381				8,018				32.8	%		40	%		32.5	%		47.5	%
	Pooled funds—Canadian equities	8,324				7,391				32.5	%		30	%		22.5	%		37.5	%
	Pooled funds—non-Canadian equities	8,706				7,318				34	%		30	%		22.5	%		37.5	%
	Total	$	25,582			$	22,727
Fair value of pension plan assets	'
	he following information discloses the fair values of our Pension Plan assets, by asset category, for the periods indicated (in thousands):
		31-Dec-13										31-Dec-12
		Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)				Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	Cash and cash equivalents	$	171		$	—		$	—			$	—		$	—		$	—
	Fixed income mutual funds (a)	—			8,381			—				—			8,018			—
	Equity mutual funds (a)	—			17,030			—				—			14,709			—
	Total	$	171		$	25,411		$	—			$	—		$	22,727		$	—
	(a) Mutual funds are valued daily in actively traded markets by an independent custodian for the investment manager. For purposes of calculating the value, portfolio securities and other assets for which market quotes are readily available are valued at market value. Market value is generally determined on a basis of last reported sales prices, or if no sales are reported, based on quotes obtained from a quotation reporting system, established market makers, or pricing services. Investments initially valued in currencies other than the U.S. dollar are converted to the U.S. dollar using exchange rates obtained from pricing services.
Projected benefit obligation assumptions [Member]	'
Weighted Average Discount Rate [Line Items]	'
Schedule of Assumptions Used [Table Text Block]	'
	The following table sets forth the assumptions used to determine the projected benefit obligation of the Pension Plans for the periods indicated:
		Year Ended December 31, 2013			Year Ended December 31, 2012
	Discount rate	4.7	%		3.9	%
	Compensation increase rate	3.5	%		3.5	%
Net periodic benefit cost assumptions [Member]	'
Weighted Average Discount Rate [Line Items]	'
Schedule of Assumptions Used [Table Text Block]	'
	The following table sets forth the assumptions used to determine net periodic benefit cost related to the Pension Plans for the periods indicated:
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Discount rate	3.9	%		4.25	%		5.25	%
	Expected long-term rate of return on plan assets	6	%		6	%		6.75	%
	Compensation increase rate	3.5	%		3.5	%		3.5	%

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Components of accumulated other comprehensive income (loss)	'
	The following table presents changes in the components of accumulated other comprehensive income (loss) (in thousands):
		Currency			Employee			Interest			Total
		Translation			Benefit			Rate Swaps
					Plans
	Balance, December 31, 2010	$	2,295		$	(1,180	)	$	—		$	1,115
	Currency translation adjustment	(13,075		)	—			—			(13,075		)
	Changes related to interest rate swaps, net of income tax benefit of $74	—			—			(284		)	(284		)
	Changes related to benefit plans, net of income tax benefit of $553	—			(1,631		)	—			(1,631		)
	Balance, December 31, 2011	(10,780		)	(2,811		)	(284		)	(13,875		)
	Currency translation adjustment, net of income tax expense of $1,168	12,635			—			—			12,635
	Settlement of interest rate swaps	—			—			284			284
	Changes related to benefit plans, net of income tax benefit of $117	—			(343		)	—			(343		)
	Balance, December 31, 2012	1,855			(3,154		)	—			(1,299		)
	Currency translation adjustment, net of income tax benefit of $3,993	(6,363		)	—			—			(6,363		)
	Changes related to benefit plans, net of income tax expense of $1,603	—			4,808			—			4,808
	Balance, December 31, 2013	$	(4,508	)	$	1,654		$	—		$	(2,854	)

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 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 (in thousands):
		Year Ended December 31, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011
	Decrease (increase) in restricted cash	$	29,467		$	4,907		$	25,827
	Decrease (increase) in accounts receivable	11,172			(129,102		)	28,568
	Decrease (increase) in receivable from affiliates	(61,095		)	230			(6,071		)
	Decrease (increase) in inventories	(11,352		)	(936		)	(8,908		)
	Decrease (increase) in derivatives and margin deposits	1,012			(1,245		)	14,287
	Decrease (increase) in other current assets	9,361			4,197			(7,214		)
	Decrease (increase) in other assets	137			2,467			(1,874		)
	Increase (decrease) in accounts payable and accrued liabilities	31,030			114,776			(9,446		)
	Increase (decrease) in payable to affiliates	62,279			(6,871		)	6,614
	Increase (decrease) in payables to pre-petition creditors	(29,609		)	(5,206		)	(34,490		)
	Increase (decrease) in other noncurrent liabilities	(2,541		)	2,500			4,115
		$	39,861		$	(14,283	)	$	11,408

Quarterly_Financial_Data_Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Summarized Information on the Consolidated Results of Operations	'
	Summarized information on our consolidated results of operations for the quarters during the year ended December 31, 2013 is shown below (in thousands, except per share amounts):
		First			Second			Third			Fourth			Total
		Quarter			Quarter			Quarter			Quarter
	Total revenues	$	287,696		$	324,244		$	357,748		$	457,328		$	1,427,016
	Loss (gain) on disposal of long-lived assets, net	(162		)	(376		)	408			(109		)	(239		)
	Other operating costs and expenses	282,813			312,103			344,979			448,796			1,388,691
	Total expenses	282,651			311,727			345,387			448,687			1,388,452
	Earnings from equity method investments	17,345			14,861			7,483			12,788			52,477
	Gain on issuance of common units by equity method investee	—			—			—			26,873			26,873
	Operating income	22,390			27,378			19,844			48,302			117,914
	Other expenses, net	27,862			10,613			13,294			17,646			69,415
	Income (loss) from continuing operations before income taxes	(5,472		)	16,765			6,550			30,656			48,499
	Income tax expense (benefit)	(54,006		)	9,288			3,413			24,051			(17,254		)
	Income from continuing operations	48,534			7,477			3,137			6,605			65,753
	Income (loss) from discontinued operations, net of income taxes	32			35			(2		)	(6		)	59
	Net income	48,566			7,512			3,135			6,599			65,812
	Less: net income attributable to noncontrolling interests	5,143			3,943			5,054			3,319			17,710
	Net income (loss) attributable to SemGroup	$	43,423		$	3,569		$	(1,919	)	$	3,280		$	48,102
	Earnings (loss) per share—basic	$	1.03		$	0.08		$	(0.05	)	$	0.08		$	1.14
	Earnings (loss) per share—diluted	$	1.03		$	0.08		$	(0.05	)	$	0.08		$	1.13
	Summarized information on our consolidated results of operations for the quarters during the year ended December 31, 2012 is shown below (in thousands, except per share amounts):
		First			Second			Third			Fourth			Total
		Quarter			Quarter			Quarter			Quarter
	Total revenues	$	312,031		$	331,777		$	277,852		$	315,837		$	1,237,497
	Loss (gain) on disposal of long-lived assets, net	—			119			(3,615		)	(35		)	(3,531		)
	Other operating costs and expenses	311,067			330,768			270,958			306,920			1,219,713
	Total expenses	311,067			330,887			267,343			306,885			1,216,182
	Earnings from equity method investments	7,498			12,289			3,116			13,133			36,036
	Operating income	8,462			13,179			13,625			22,085			57,351
	Other expenses, net	7,616			5,587			11,701			5,567			30,471
	Income from continuing operations before income taxes	846			7,592			1,924			16,518			26,880
	Income tax expense (benefit)	(1,012		)	(92		)	2,092			(3,066		)	(2,078		)
	Income (loss) from continuing operations	1,858			7,684			(168		)	19,584			28,958
	Income (loss) from discontinued operations, net of income taxes	252			(441		)	(264		)	3,392			2,939
	Net income (loss)	2,110			7,243			(432		)	22,976			31,897
	Less: net income attributable to noncontrolling interests	3,483			2,096			2,336			1,882			9,797
	Net income (loss) attributable to SemGroup	$	(1,373	)	$	5,147		$	(2,768	)	$	21,094		$	22,100
	Earnings (loss) per share—basic	$	(0.03	)	$	0.12		$	(0.07	)	$	0.5		$	0.53
	Earnings (loss) per share—diluted	$	(0.03	)	$	0.12		$	(0.07	)	$	0.5		$	0.52
	In the third quarter of 2012, we classified SemStream Arizona's residential business as discontinued operations. Prior periods were recast to reflect the discontinued operations classification. See Notes 7 and 8 for additional information.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	The amounts were as follows for the years ended December 31, 2013, 2012 and 2011 (in thousands):
		Year Ended December 31, 2013		Year Ended December 31, 2012		Year Ended December 31, 2011
	Revenues	$	103,203	$	58,643	$	9,708
	Purchases	$	15,255	$	42,741	$	11,270
	Reimbursements from NGL Energy for services	$	198	$	575	$	346

Condensed_Consolidating_Guaran1

Condensed Consolidating Guarantor Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]	'
Condensed Balance Sheet [Table Text Block]	'
	Condensed Consolidating Guarantor Balance Sheets
		31-Dec-13
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	ASSETS
	Current assets:
	Cash and cash equivalents	$	2,545		$	—		$	78,364		$	(1,558	)	$	79,351
	Restricted cash	3,851			—			1,268			—			5,119
	Accounts receivable	649			14,642			308,674			—			323,965
	Receivable from affiliates	1,519			14,063			56,040			(4,349		)	67,273
	Inventories	—			1,046			43,249			—			44,295
	Other current assets	8,712			193			5,106			—			14,011
	Total current assets	17,276			29,944			492,701			(5,907		)	534,014
	Property, plant and equipment	4,114			366,067			735,547			—			1,105,728
	Equity method investments	1,511,922			461,056			159,321			(1,567,175		)	565,124
	Goodwill	—			23,839			38,182			—			62,021
	Other intangible assets	31			163,144			11,663			—			174,838
	Other noncurrent assets, net	15,263			1,302			12,324			—			28,889
	Total assets	$	1,548,606		$	1,045,352		$	1,449,738		$	(1,573,082	)	$	2,470,614
	LIABILITIES AND OWNERS’ EQUITY
	Current liabilities:
	Accounts payable	$	1,172		$	24,234		$	229,061		$	—		$	254,467
	Payable to affiliates	17			115			67,062			(4,915		)	62,279
	Accrued liabilities	10,072			17,341			56,011			5			83,429
	Payables to pre-petition creditors	3,124			—			53			—			3,177
	Deferred revenue	—			—			25,538			—			25,538
	Other current liabilities	61,875			715			7,697			—			70,287
	Current portion of long-term debt	—			—			37			—			37
	Total current liabilities	76,260			42,405			385,459			(4,910		)	499,214
	Long-term debt	370,000			—			245,088			—			615,088
	Deferred income taxes	48,436			—			52,509			—			100,945
	Other noncurrent liabilities	8			—			41,496			—			41,504
	Commitments and contingencies
	Owners’ equity excluding noncontrolling interests in consolidated subsidiaries	1,053,902			1,002,947			565,225			(1,568,172		)	1,053,902
	Noncontrolling interests in consolidated subsidiaries	—			—			159,961			—			159,961
	Total owners’ equity	1,053,902			1,002,947			725,186			(1,568,172		)	1,213,863
	Total liabilities and owners’ equity	$	1,548,606		$	1,045,352		$	1,449,738		$	(1,573,082	)	$	2,470,614
		31-Dec-12
		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 Income Statement [Table Text Block]	'
	Condensed Consolidating Guarantor Statements of Operations
		Year Ended December 31, 2013
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	Revenues:
	Product	$	—		$	224,072		$	944,984		$	(23,952	)	$	1,145,104
	Service	—			3,868			136,330			—			140,198
	Other	—			—			141,714			—			141,714
	Total revenues	—			227,940			1,223,028			(23,952		)	1,427,016
	Expenses:													—
	Costs of products sold, exclusive of depreciation and amortization shown below	—			166,735			877,317			(23,952		)	1,020,100
	Operating	—			19,541			204,044			—			223,585
	General and administrative	21,560			9,437			47,600			—			78,597
	Depreciation and amortization	2,001			14,452			49,956			—			66,409
	Loss (gain) loss on disposal of long-lived assets, net	—			668			(907		)	—			(239		)
	Total expenses	23,561			210,833			1,178,010			(23,952		)	1,388,452
	Earnings from equity method investments	67,965			54,995			44,203			(114,686		)	52,477
	Gain on issuance of common units by equity method investee	26,873			—			—			—			26,873
	Operating income	71,277			72,102			89,221			(114,686		)	117,914
	Other expenses (income):													—
	Interest expense	4,826			9,781			15,947			(5,412		)	25,142
	Foreign currency transaction loss (gain)	—			—			(1,633		)	—			(1,633		)
	Other expense (income), net	40,928			—			(434		)	5,412			45,906
	Total other expenses, net	45,754			9,781			13,880			—			69,415
	Income from continuing operations before income taxes	25,523			62,321			75,341			(114,686		)	48,499
	Income tax expense (benefit)	(22,579		)	—			5,325			—			(17,254		)
	Income from continuing operations	48,102			62,321			70,016			(114,686		)	65,753
	Income (loss) from discontinued operations, net of income taxes	—			65			(6		)	—			59
	Net income	48,102			62,386			70,010			(114,686		)	65,812
	Less: net income attributable to noncontrolling interests	—			—			17,710			—			17,710
	Net income attributable to SemGroup	$	48,102		$	62,386		$	52,300		$	(114,686	)	$	48,102
	Net income	$	48,102		$	62,386		$	70,010		$	(114,686	)	$	65,812
	Other comprehensive loss, net of income taxes	(1,517		)	—			(38		)	—			(1,555		)
	Comprehensive income	46,585			62,386			69,972			(114,686		)	64,257
	Less: comprehensive income attributable to noncontrolling interests	—			—			17,710			—			17,710
	Comprehensive income attributable to SemGroup	$	46,585		$	62,386		$	52,262		$	(114,686	)	$	46,547
		Year Ended December 31, 2012
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	Revenues:
	Product	$	—		$	123,424		$	840,892		$	(10,578	)	$	953,738
	Service	—			1,198			116,523			—			117,721
	Other	—			387			165,651			—			166,038
	Total revenues	—			125,009			1,123,066			(10,578		)	1,237,497
	Expenses:
	Costs of products sold, exclusive of depreciation and amortization shown below	—			98,224			787,239			(10,578		)	874,885
	Operating	—			12,719			211,981			—			224,700
	General and administrative	22,105			8,360			41,453			—			71,918
	Depreciation and amortization	2,496			6,448			39,266			—			48,210
	(Gain) loss on disposal of long-lived assets, net	—			276			(3,807		)	—			(3,531		)
	Total expenses	24,601			126,027			1,076,132			(10,578		)	1,216,182
	Earnings from equity method investments	66,671			85,330			36,439			(152,404		)	36,036
	Operating income	42,070			84,312			83,373			(152,404		)	57,351
	Other expenses (income):
	Interest expense	3,942			(240		)	11,056			(5,856		)	8,902
	Foreign currency transaction loss	—			—			298			—			298
	Other expense (income), net	15,698			(21		)	(262		)	5,856			21,271
	Total other expenses (income), net	19,640			(261		)	11,092			—			30,471
	Income from continuing operations before income taxes	22,430			84,573			72,281			(152,404		)	26,880
	Income tax expense (benefit)	334			—			(2,412		)	—			(2,078		)
	Income from continuing operations	22,096			84,573			74,693			(152,404		)	28,958
	Income (loss) from discontinued operations, net of income taxes	4			(17		)	2,952			—			2,939
	Net income	22,100			84,556			77,645			(152,404		)	31,897
	Less: net income attributable to noncontrolling interests	—			—			9,797			—			9,797
	Net income attributable to SemGroup	$	22,100		$	84,556		$	67,848		$	(152,404	)	$	22,100
Net income	$	22,100		$	84,556		$	77,645		$	(152,404	)	$	31,897
Other comprehensive income, net of income taxes	917			—			11,659			—			12,576
Comprehensive income	23,017			84,556			89,304			(152,404		)	44,473
Less: comprehensive income attributable to noncontrolling interests	—			—			9,797			—			9,797
Comprehensive income attributable to SemGroup	$	23,017		$	84,556		$	79,507		$	(152,404	)	$	34,676
	Year Ended December 31, 2011
	Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
Revenues:
Product	$	—		$	712,724		$	609,870		$	(85,281	)	$	1,237,313
Service	—			2,778			120,567			—			123,345
Other	—			311			104,277			—			104,588
Total revenues	—			715,813			834,714			(85,281		)	1,465,246
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	—			673,927			555,793			(85,281		)	1,144,439
Operating	—			14,594			140,447			—			155,041
General and administrative	15,564			13,854			46,029			—			75,447
Depreciation and amortization	2,930			8,892			38,001			—			49,823
(Gain) loss on disposal of long-lived assets, net	1,605			(46,139		)	44,835			—			301
Total expenses	20,099			665,128			825,105			(85,281		)	1,425,051
Earnings (losses) from equity method investments	32,096			(20,736		)	15,004			(11,360		)	15,004
Operating income	11,997			29,949			24,613			(11,360		)	55,199
Other expenses (income):
Interest expense	24,352			19,498			21,157			(4,869		)	60,138
Foreign currency transaction loss (gain)	—			39			(3,489		)	—			(3,450		)
Other (income) expense, net	(12,141		)	(2,150		)	(2,117		)	4,869			(11,539		)
Total other expenses, net	12,211			17,387			15,551			—			45,149
Income (loss) from continuing operations before income taxes	(214		)	12,562			9,062			(11,360		)	10,050
Income tax (benefit) expense	(2,485		)	—			175			—			(2,310		)
Income from continuing operations	2,271			12,562			8,887			(11,360		)	12,360
Income (loss) from discontinued operations, net of income taxes	106			28			(9,682		)	—			(9,548		)
Net income (loss)	2,377			12,590			(795		)	(11,360		)	2,812
Less: net income attributable to noncontrolling interests	—			—			435			—			435
Net income (loss) attributable to SemGroup	$	2,377		$	12,590		$	(1,230	)	$	(11,360	)	$	2,377
Net income (loss)	$	2,377		$	12,590		$	(795	)	$	(11,360	)	$	2,812
Other comprehensive loss, net of income taxes	(1,853		)	—			(13,137		)	—			(14,990		)
Comprehensive income (loss)	524			12,590			(13,932		)	(11,360		)	(12,178		)
Less: comprehensive income attributable to noncontrolling interests	—			—			435			—			435
Comprehensive income (loss) attributable to SemGroup	$	524		$	12,590		$	(14,367	)	$	(11,360	)	$	(12,613	)
Condensed Cash Flow Statement [Table Text Block]	'
	Condensed Consolidating Guarantor Statements of Cash Flows
		Year Ended December 31, 2013
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	Net cash provided by (used in) operating activities	$	20,130		$	24,642		$	148,872		$	(20,235	)	$	173,409
	Cash flows from investing activities:
	Capital expenditures	(734		)	(123,246		)	(91,629		)	—			(215,609		)
	Proceeds from sale of long-lived assets	23			19			1,237			—			1,279
	Investments in non-consolidated subsidiaries	(18,775		)	(57,850		)	(97,243		)	—			(173,868		)
	Payments to acquire businesses	—			(313,487		)	(48,969		)	—			(362,456		)
	Proceeds from the sale of interest in SemCrude Pipeline, L.L.C. to Rose Rock Midstream, L.P.	362,600			—			—			(362,600		)	—
	Distributions in excess of equity in earnings of affiliates	—			—			12,246			—			12,246
	Net cash provided by (used in) investing activities	343,114			(494,564		)	(224,358		)	(362,600		)	(738,408		)
	Cash flows from financing activities:
	Debt issuance costs	(10,866		)	—			(4,070		)	—			(14,936		)
	Borrowings on debt	706,000			—			562,474			—			1,268,474
	Principal payments on debt and other obligations	(537,500		)	—			(321,912		)	—			(859,412		)
	Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			210,226			—			210,226
	Distributions to noncontrolling interests	—			—			(17,647		)	—			(17,647		)
	Proceeds from warrant exercises	225			—			—			—			225
	Repurchase of common stock	(371		)	—			—			—			(371		)
	Dividends paid	(25,429		)	—			—			—			(25,429		)
	Intercompany borrowings (advances), net	(511,881		)	469,922			(342,256		)	384,215			—
	Net cash provided by (used in) financing activities	(379,822		)	469,922			86,815			384,215			561,130
	Effect of exchange rate changes on cash and cash equivalents	—			—			3,191			—			3,191
	Change in cash and cash equivalents	(16,578		)	—			14,520			1,380			(678		)
	Cash and cash equivalents at beginning of period	19,123			—			63,844			(2,938		)	80,029
	Cash and cash equivalents at end of period	$	2,545		$	—		$	78,364		$	(1,558	)	$	79,351
		Year Ended December 31, 2012
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	Net cash provided by (used in) operating activities	$	(4,535	)	$	6,236		$	93,534		$	(15,593	)	$	79,642
	Cash flows from investing activities:
	Capital expenditures	(1,977		)	(59,317		)	(58,025		)	—			(119,319		)
	Proceeds from sale of long-lived assets	19			(202		)	2,824			—			2,641
	Investments in non-consolidated subsidiaries	(1,740		)	(74,434		)	(2,079		)	—			(78,253		)
	Proceeds from the sale of non-consolidated affiliate	—			—			3,500			—			3,500
	Proceeds from the sale of SemStream assets	12,250			—			—			—			12,250
	Distributions in excess of equity in earnings of affiliates	9,218			—			8,072			—			17,290
	Net cash provided by (used in) investing activities	17,770			(133,953		)	(45,708		)	—			(161,891		)
	Cash flows from financing activities:
	Debt issuance costs	(455		)	—			(252		)	—			(707		)
	Borrowings on credit facilities	318,000			—			—			—			318,000
	Principal payments on credit facilities and other obligations	(194,000		)	—			(28,066		)	—			(222,066		)
	Distributions to noncontrolling interests	—			—			(8,502		)	—			(8,502		)
	Repurchase of common stock	(242		)	—			—			—			(242		)
	Intercompany borrowings (advances), net	(117,526		)	127,717			(25,608		)	15,417			—
	Net cash provided by (used in) financing activities	5,777			127,717			(62,428		)	15,417			86,483
	Effect of exchange rate changes on cash and cash equivalents	—			—			(610		)	—			(610		)
	Change in cash and cash equivalents	19,012			—			(15,212		)	(176		)	3,624
	Change in cash and cash equivalents included in discontinued operations	—			—			2,792			—			2,792
	Change in cash and cash equivalents from continuing operations	19,012			—			(12,420		)	(176		)	6,416
	Cash and cash equivalents at beginning of period	111			—			76,264			(2,762		)	73,613
	Cash and cash equivalents at end of period	$	19,123		$	—		$	63,844		$	(2,938	)	$	80,029
		Year Ended December 31, 2011
		Parent			Guarantors			Non-guarantors			Consolidating Adjustments			Consolidated
	Net cash provided by operating activities	$	6,817		$	44,957		$	17,004		$	5,263		$	74,041
	Cash flows from investing activities:
	Capital expenditures	(2,080		)	(16,865		)	(47,050		)	—			(65,995		)
	Proceeds from sale of long-lived assets	—			82			1,043			—			1,125
	Investments in non-consolidated subsidiaries	(3,218		)	(23		)	(476		)	—			(3,717		)
	Proceeds from the sale of SemStream assets	93,054			—			—			—			93,054
	Proceeds from sale of limited partner interest in subsidiary, net of offering costs	127,134			—			—			(127,134		)	—
	Distributions in excess of equity in earnings of affiliates	—			—			12,455			—			12,455
	Net cash provided by (used in) investing activities	214,890			(16,806		)	(34,028		)	(127,134		)	36,922
Cash flows from financing activities:
Debt issuance costs	(10,867		)	—			(1,666		)	—			(12,533		)
Borrowings on credit facilities	255,471			—			8,434			—			263,905
Principal payments on credit facilities and other obligations	(498,515		)	(21		)	(4,653		)	—			(503,189		)
Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs	—			—			127,134			—			127,134
Intercompany borrowings (advances), net	25,099			(28,130		)	(116,789		)	119,820			—
Net cash provided by (used in) financing activities	(228,812		)	(28,151		)	12,460			119,820			(124,683		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(34		)	—			(34		)
Change in cash and cash equivalents	(7,105		)	—			(4,598		)	(2,051		)	(13,754		)
Change in cash and cash equivalents included in discontinued operations	—			—			(454		)	—			(454		)
Change in cash and cash equivalents from continuing operations	(7,105		)	—			(5,052		)	(2,051		)	(14,208		)
Cash and cash equivalents at beginning of period	7,216			—			81,316			(711		)	87,821
Cash and cash equivalents at end of period	$	111		$	—		$	76,264		$	(2,762	)	$	73,613

Overview_Details

Overview (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2012

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

In Thousands, except Share data, unless otherwise specified

Rose Rock Midstream L P [Member]

Crude [Member]

SemCAMS [Member]

SemGas [Member]

SemLogistics [Member]

SemMexico [Member]

General Partner [Member]

Limited Partner [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Partnership Interest [Member]

Partnership Interest [Member]

mi

mi

mi

bbl

Plant

Crude [Member]

Crude [Member]

Ngl Energy Partners Lp [Member]

Crude [Member]

Crude [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

Limited Partner [Member]

Glass Mountain Pipeline Llc [Member]

Ngl Energy Partners Lp [Member]

Trucks

Plant

Plant

Facility

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

mi

mi

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

Limited Partner [Member]

bbl

Terminal

SemStream [Member]

Schedule Of Overview [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payables to pre-petition creditors

$3,177

$32,933

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

General partner ownership interest

'

'

2.00%

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

Equity method investment, ownership percentage

'

'

'

'

'

'

'

'

'

'

50.00%

50.00%

51.00%

51.00%

11.78%

11.78%

6.42%

'

50.00%

12.80%

Length of pipeline network (in miles)

'

'

'

624

600

1,300

'

'

'

'

'

210

'

527

'

'

'

'

'

'

Limited partner units owned

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,133,409

'

'

Limited partner ownership interest

'

'

'

'

'

'

'

'

'

51.60%

'

'

'

'

'

'

'

'

'

'

Oil storage capacity, barrels

'

'

'

7,350,000

'

'

8,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Trucks and trailers

'

'

'

130

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of manufacturing plants

'

'

'

'

4

3

'

12

'

'

'

'

'

'

'

'

'

'

'

'

Number of emulsion distribution terminals

'

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

Number of rail unloading facilities

'

'

'

'

'

'

'

3

'

'

'

'

'

'

'

'

'

'

'

'

Consolidation_And_Basis_Of_Pre2

Consolidation And Basis Of Presentation (Details Textual) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

SemCAMS [Member]

SemCAMS [Member]

Crude [Member]

NGL Energy [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Glass Mountain Pipeline Llc [Member]

Semcrude Pipeline [Member]

Semcrude Pipeline [Member]

mi

Proportionally Consolidated Assets [Member]

mi

SemStream [Member]

Semcrude Pipeline [Member]

Crude [Member]

Crude [Member]

Rose Rock Midstream L P [Member]

Common control transaction [Member]

Seat

mi

mi

Rose Rock Midstream L P [Member]

Consolidation And Basis Of Presentation [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Property, plant and equipment

$1,105,728,000

$814,724,000

'

$206,400,000

'

'

'

'

'

'

'

'

Equity method investment, ownership percentage

'

'

'

'

'

'

51.00%

51.00%

51.00%

50.00%

'

'

Percentage ownership sold to subsidiary in common control transaction

'

'

'

'

'

'

'

'

'

'

66.67%

'

Gain (loss) sale of interest in SemCrude Pipeline, L.L.C. to subsidiary

'

'

'

'

'

'

'

'

'

'

'

$0

Number of seats on the board of directors

'

'

'

'

'

2

'

'

'

'

'

'

Length of pipeline network (in miles)

'

'

600

'

624

'

'

'

527

210

'

'

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2013
Pipelines and related facilities [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'10 years
Pipelines and related facilities [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'31 years
Storage and terminal facilities [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'10 years
Storage and terminal facilities [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'25 years
Natural gas gathering and processing facilities [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'10 years
Natural gas gathering and processing facilities [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'31 years
Office and Other Property and Equipment [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'3 years
Office and Other Property and Equipment [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Useful life property, plant and equipment (in years)	'31 years

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Details Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
In Thousands, unless otherwise specified	Country		Restricted Cash For Settlement Purposes [Member]	SemCAMS [Member]	Minimum [Member]	Maximum [Member]	Other Current Liabilities [Member]
					SemCAMS [Member]	SemCAMS [Member]	Discontinued Operations [Member]
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Payables to pre-petition creditors	$3,177	$32,933	'	'	'	'	$700
Restricted cash	$5,119	$34,678	$5,100	'	'	'	'
Maintenance period	'	'	'	'	'4 years	'5 years	'
Number of countries in which segments operate	4	'	'	'	'	'	'
Percentage mark-up on pass-through of recoverable maintenance costs	'	'	'	10.00%	'	'	'

Rose_Rock_Midstream_LP_Details

Rose Rock Midstream, L.P. (Details) (USD $)

1 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

Aug. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Jan. 11, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 14, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 14, 2011

Dec. 31, 2013

Jan. 13, 2013

Dec. 31, 2012

Dec. 31, 2013

Jan. 11, 2013

Dec. 31, 2013

Dec. 31, 2013

Jan. 11, 2013

Jan. 11, 2013

Jan. 11, 2013

Jan. 11, 2013

Dec. 16, 2013

Dec. 16, 2013

Dec. 16, 2013

Dec. 16, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Semcrude Pipeline [Member]

Common Units [Member]

Subordinated Units [Member]

Class A [Member]

IPO [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Limited Partner [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Common Units [Member]

Common Units [Member]

Noncontrolling Interest [Member]

Additional Paid-in Capital [Member]

Initial contribution of 33% Interest in SemCrude Pipeline [Member] [Member]

Initial contribution of 33% Interest in SemCrude Pipeline [Member] [Member]

Initial contribution of 33% Interest in SemCrude Pipeline [Member] [Member]

Initial contribution of 33% Interest in SemCrude Pipeline [Member] [Member]

Second contribution of 33% Interest in SemCrude Pipeline [Member]

Second contribution of 33% Interest in SemCrude Pipeline [Member]

Second contribution of 33% Interest in SemCrude Pipeline [Member]

Second contribution of 33% Interest in SemCrude Pipeline [Member]

Minimum [Member]

Crude [Member]

Crude [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

bbl

Semcrude Pipeline [Member]

IPO [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Private Placement [Member]

Semcrude Pipeline [Member]

Rose Rock Midstream L P [Member]

Capital Unit, Class A [Member]

Common Units [Member]

Semcrude Pipeline [Member]

Rose Rock Midstream L P [Member]

Capital Unit, Class A [Member]

Common Units [Member]

First Target Distribution [Member]

White Cliffs Pipeline, LLC [Member]

Limited Partner [Member]

Semcrude Pipeline [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Semcrude Pipeline [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Ownership Interest [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common units representing limited partner interests

'

'

'

'

'

'

'

4,389,709

8,389,709

2,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

General partner ownership interest

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited partner ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

51.60%

Limited Partners' Capital Account, Units Issued

'

'

'

'

'

'

'

'

'

'

'

'

'

7,000,000

'

'

'

4,750,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs

$152,500,000

$210,226,000

$0

$127,134,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Average daily throughput threshold in barrels for conversion of Class A units

'

'

'

'

'

'

'

'

'

'

'

125,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common units sold in private placement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction related costs

'

2,200,000

'

'

'

4,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

59,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from lines of credit

'

'

'

'

133,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capacity of revolving credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

585,000,000

385,000,000

150,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity issuance costs paid from proceeds

'

'

'

'

'

1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred borrowing costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction costs expensed

'

'

'

'

'

900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (Loss) on Sale of Equity Investments

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale of interest in equity investment to related party

'

67,291,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

180,220,000

-112,929,000

'

'

'

'

'

'

'

'

'

'

'

Tax effect of adjustment to APIC from sale of equity investment to less than wholly owned subsidiary

'

67,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance initial public offering

'

'

'

'

'

'

'

'

'

'

127,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity method investment, ownership percentage

'

'

'

'

'

'

'

'

'

'

'

51.00%

51.00%

'

'

'

'

'

'

'

'

33.00%

'

'

'

33.00%

'

'

'

'

51.00%

'

Proceeds from sale of SemCrude Pipeline investment to Rose Rock

'

$0

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$189,500,000

'

'

'

$173,100,000

'

'

'

'

'

Equity consideration received for SemCrude Pipeline ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1250000

'1500000

'

'

'1250000

'1500000

'

'

'

Partners' minimum quarterly distribution per unit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.3625

'

'

Rose_Rock_Midstream_LP_Details1

Rose Rock Midstream, L.P. (Details 1)	12 Months Ended
	Dec. 31, 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	'
Partners' minimum quarterly distribution per unit	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	'
Partners' minimum quarterly distribution per unit	0.3625
First Target Distribution [Member] | Maximum [Member]	'
Quarterly Target Distributions	'
Partners' minimum quarterly distribution per unit	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	'
Partners' minimum quarterly distribution per unit	0.416875
Second Target Distribution [Member] | Maximum [Member]	'
Quarterly Target Distributions	'
Partners' minimum quarterly distribution per unit	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	'
Partners' minimum quarterly distribution per unit	0.453125
Third Target Distribution [Member] | Maximum [Member]	'
Quarterly Target Distributions	'
Partners' minimum quarterly distribution per unit	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	'
Partners' minimum quarterly distribution per unit	0.54375

Rose_Rock_Midstream_LP_Details2

Rose Rock Midstream, L.P. (Details 2) (USD $)

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

12 Months Ended

0 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Feb. 13, 2012

Sep. 30, 2013

Feb. 13, 2012

Feb. 13, 2012

Feb. 13, 2012

15-May-12

Sep. 30, 2013

15-May-12

15-May-12

15-May-12

Aug. 14, 2012

Sep. 30, 2013

Aug. 14, 2012

Aug. 14, 2012

Aug. 14, 2012

Nov. 14, 2012

Sep. 30, 2013

Nov. 14, 2012

Nov. 14, 2012

Nov. 14, 2012

Feb. 14, 2013

Sep. 30, 2013

Feb. 14, 2013

Feb. 14, 2013

Feb. 14, 2013

15-May-13

Sep. 30, 2013

15-May-13

15-May-13

15-May-13

Aug. 14, 2013

Sep. 30, 2013

Aug. 14, 2013

Aug. 14, 2013

Aug. 14, 2013

Nov. 14, 2013

Sep. 30, 2013

Nov. 14, 2013

Nov. 14, 2013

Nov. 14, 2013

Feb. 14, 2014

Dec. 31, 2013

Feb. 14, 2014

Feb. 14, 2014

Feb. 14, 2014

Feb. 13, 2012

15-May-12

Aug. 14, 2012

Nov. 14, 2012

Feb. 14, 2013

15-May-13

Aug. 14, 2013

Nov. 14, 2013

Feb. 14, 2014

Distribution of Q4 2011 earnings (pro-rated) [Member]

Distribution of Q4 2011 earnings (pro-rated) [Member]

Distribution of Q4 2011 earnings (pro-rated) [Member]

Distribution of Q4 2011 earnings (pro-rated) [Member]

Distribution of Q4 2011 earnings (pro-rated) [Member]

Distribution of Q1 2012 earnings [Member]

Distribution of Q1 2012 earnings [Member]

Distribution of Q1 2012 earnings [Member]

Distribution of Q1 2012 earnings [Member]

Distribution of Q1 2012 earnings [Member]

Distribution of Q2 2012 earnings [Member]

Distribution of Q2 2012 earnings [Member]

Distribution of Q2 2012 earnings [Member]

Distribution of Q2 2012 earnings [Member]

Distribution of Q2 2012 earnings [Member]

Distribution of Q3 2012 earnings [Member]

Distribution of Q3 2012 earnings [Member]

Distribution of Q3 2012 earnings [Member]

Distribution of Q3 2012 earnings [Member]

Distribution of Q3 2012 earnings [Member]

Distribution of Q4 2012 earnings [Member]

Distribution of Q4 2012 earnings [Member]

Distribution of Q4 2012 earnings [Member]

Distribution of Q4 2012 earnings [Member]

Distribution of Q4 2012 earnings [Member]

Distribution of Q1 2013 earnings [Member]

Distribution of Q1 2013 earnings [Member]

Distribution of Q1 2013 earnings [Member]

Distribution of Q1 2013 earnings [Member]

Distribution of Q1 2013 earnings [Member]

Distribution of Q2 2013 earnings [Member]

Distribution of Q2 2013 earnings [Member]

Distribution of Q2 2013 earnings [Member]

Distribution of Q2 2013 earnings [Member]

Distribution of Q2 2013 earnings [Member]

Distribution of Q3 2013 earnings [Member]

Distribution of Q3 2013 earnings [Member]

Distribution of Q3 2013 earnings [Member]

Distribution of Q3 2013 earnings [Member]

Distribution of Q3 2013 earnings [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Distribution of Q4 2013 earnings [Member]

Distribution of Q4 2013 earnings [Member]

Distribution of Q4 2013 earnings [Member]

Distribution of Q4 2013 earnings [Member]

Distribution of Q4 2013 earnings [Member]

Distribution of Q4 2011 earnings (pro-rated) [Member]

Distribution of Q1 2012 earnings [Member]

Distribution of Q2 2012 earnings [Member]

Distribution of Q3 2012 earnings [Member]

Distribution of Q4 2012 earnings [Member]

Distribution of Q1 2013 earnings [Member]

Distribution of Q2 2013 earnings [Member]

Distribution of Q3 2013 earnings [Member]

Subsequent Event [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Common Unit [Member]

Subordinated Units [Member]

Noncontrolling Interest [Member]

Semgroup [Member]

Semgroup [Member]

Distribution of Q4 2013 earnings [Member]

Common Unit [Member]

Subordinated Units [Member]

Distributions Paid

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Member or Limited Partner, Declaration Date

'

3-Feb-12

[1]

'

'

'

'

7-May-12

'

'

'

'

6-Aug-12

'

'

'

'

5-Nov-12

'

'

'

'

4-Feb-13

'

'

'

'

6-May-13

'

'

'

'

5-Aug-13

'

'

'

'

5-Nov-13

'

'

'

'

4-Feb-14

'

'

'

'

'

'

'

'

'

'

'

'

Distribution Made to Limited Partner, Distribution Date

'

13-Feb-12

[1]

'

'

'

'

15-May-12

'

'

'

'

14-Aug-12

'

'

'

'

14-Nov-12

'

'

'

'

14-Feb-13

'

'

'

'

15-May-13

'

'

'

'

14-Aug-13

'

'

'

'

14-Nov-13

'

'

'

'

14-Feb-14

'

'

'

'

'

'

'

'

'

'

'

'

Distribution per unit

$0.07

[1]

'

'

'

'

$0.37

'

'

'

'

$0.38

'

'

'

'

$0.39

'

'

'

'

$0.40

'

'

'

'

$0.43

'

'

'

'

$0.44

'

'

'

'

$0.45

'

'

'

'

$0.47

'

'

'

'

'

'

'

'

'

'

'

'

'

General partner distributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$23

[1]

$128

$131

$134

$167

$179

$183

$232

$257

Incentive distributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

[1]

0

0

0

0

41

72

127

244

Total distributions paid

'

'

470

[1]

93

[1]

561

[1]

'

'

2,607

517

3,125

'

'

2,678

532

3,209

'

'

2,748

545

3,294

'

'

3,624

1,163

3,377

'

'

3,872

1,242

3,607

'

'

3,962

1,271

3,692

'

'

6,189

1,301

3,775

'

'

6,398

2,041

3,901

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Distributions

$1,147

[1]

'

'

'

'

$6,377

'

'

'

'

$6,550

'

'

'

'

$6,721

'

'

'

'

$8,331

'

'

'

'

$8,941

'

'

'

'

$9,180

'

'

'

'

$11,624

'

'

'

'

$12,841

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

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

Rose_Rock_Midstream_LP_Details3

Rose Rock Midstream, L.P. (Details 3) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Summarized Balance Sheet Information	'	'	'	'
Other current assets	$14,011	$18,516	'	'
Property, plant and equipment	1,105,728	814,724	'	'
Equity method investments	565,124	387,802	'	'
Goodwill	62,021	9,884	9,453	107,823
Other noncurrent assets	28,889	8,181	'	'
Total assets	2,470,614	1,748,179	'	'
Current liabilities	499,214	374,344	'	'
Long-term debt	615,088	206,062	'	'
Noncontrolling interest in consolidated subsidiaries retained by SemGroup	159,961	129,134	'	'
Total liabilities and ownersb equity	2,470,614	1,748,179	'	'
Rose Rock Midstream L P [Member]	'	'	'	'
Summarized Balance Sheet Information	'	'	'	'
Cash	15,459	108	'	'
Other current assets	306,128	250,509	'	'
Property, plant and equipment	311,616	291,530	'	'
Equity method investments	224,095	0	'	'
Goodwill	28,322	0	'	'
Other noncurrent assets	11,627	2,579	'	'
Total assets	897,247	544,726	'	'
Current liabilities	293,031	231,843	'	'
Long-term debt	245,088	4,562	'	'
Partnersb capital attributable to SemGroup	120,610	179,187	'	'
Partnersb capital attributable to noncontrolling interests	159,961	129,134	'	'
Noncontrolling interest in consolidated subsidiaries retained by SemGroup	78,557	0	'	'
Total liabilities and ownersb equity	$897,247	$544,726	'	'

Rose_Rock_Midstream_LP_Details4

Rose Rock Midstream, L.P. (Details 4) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summarized Income Statement Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	$457,328	$357,748	$324,244	$287,696	$315,837	$277,852	$331,777	$312,031	$1,427,016	$1,237,497	$1,465,246
Costs of products sold	'	'	'	'	'	'	'	'	1,020,100	874,885	1,144,439
Depreciation and amortization expense	'	'	'	'	'	'	'	'	66,409	48,210	49,823
Earnings from equity method investments	12,788	7,483	14,861	17,345	13,133	3,116	12,289	7,498	52,477	36,036	15,004
Net income (loss)	6,599	3,135	7,512	48,566	22,976	-432	7,243	2,110	65,812	31,897	2,812
Less: net income attributable to noncontrolling interests	3,319	5,054	3,943	5,143	1,882	2,336	2,096	3,483	17,710	9,797	435
Net Income (Loss) Attributable to Parent	3,280	-1,919	3,569	43,423	21,094	-2,768	5,147	-1,373	48,102	22,100	2,377
Rose Rock Midstream L P [Member]	'	'	'	'	'	'	'	'	'	'	'
Summarized Income Statement Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	766,526	620,417	431,321
Costs of products sold	'	'	'	'	'	'	'	'	663,759	546,966	366,265
Operating, general and administrative expenses	'	'	'	'	'	'	'	'	51,082	35,385	28,816
Depreciation and amortization expense	'	'	'	'	'	'	'	'	23,165	12,131	11,379
Earnings from equity method investments	'	'	'	'	'	'	'	'	17,571	0	0
Net income (loss)	'	'	'	'	'	'	'	'	38,005	23,954	23,235
Less: net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	1,256	0	0
Net Income (Loss) Attributable to Parent	'	'	'	'	'	'	'	'	$36,749	$23,954	$23,235

Investments_in_NonConsolidated1

Investments in Non-Consolidated Subsidiaries Investments in Non-Consolidated Subsidiaries (Investment Summary) (Details) (USD $)

3 Months Ended

12 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Nov. 01, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Return of and return on capital [Member]

Return of and return on capital [Member]

Return of and return on capital [Member]

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distributions from equity investments

'

'

'

'

'

'

'

'

$63,651

$36,440

$15,004

$57,576

$44,514

$27,459

$18,321

$9,217

$0

'

$0

$0

$0

$75,897

$53,731

$27,459

Earnings from equity method investments

12,788

7,483

14,861

17,345

13,133

3,116

12,289

7,498

52,477

36,036

15,004

45,459

36,439

15,004

7,123

[1]

-403

0

'

-105

0

0

'

'

'

Equity method investments

$565,124

'

'

'

$387,802

'

'

'

$565,124

$387,802

'

$224,095

$138,970

'

$208,848

$174,398

'

$184,000

$132,181

$74,434

'

'

'

'

[1]

* Excluding gain on issuance of common units of $26.9 million.

Recovered_Sheet2

Investments In Non-Consolidated Subsidiaries (Balance Sheet Disclosure) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified	White Cliffs Pipeline, LLC [Member]	White Cliffs Pipeline, LLC [Member]	Ngl Energy Partners Lp [Member]	Ngl Energy Partners Lp [Member]
Current assets	$98,457	$21,508	$1,013,859	$736,297
Property, plant and equipment, net	312,831	210,710	631,663	425,641
Goodwill	17,000	17,000	840,287	515,881
Other intangible assets, net	20,802	26,369	540,684	351,600
Total assets	449,090	275,587	3,026,493	2,029,419
Current liabilities	9,648	3,412	800,658	653,101
Long-term debt	'	'	906,066	569,903
Other noncurrent liabilities	'	'	2,673	2,599
Membersb equity	439,442	272,175	1,317,096	803,816
Total liabilities and membersb equity	$449,090	$275,587	$3,026,493	$2,029,419

Investments_in_NonConsolidated2

Investments in Non-Consolidated Subsidiaries (Income Statement Disclosure) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012
				White Cliffs Pipeline, LLC [Member]	White Cliffs Pipeline, LLC [Member]	White Cliffs Pipeline, LLC [Member]	Ngl Energy Partners Lp [Member]	Ngl Energy Partners Lp [Member]
Summarized income statement information	'	'	'	'	'	'	'	'
Revenue	'	'	'	$133,310	$108,125	$66,097	$5,935,715	$2,371,524
Costs of products sold	1,020,100	874,885	1,144,439	'	'	'	5,478,361	2,182,263
Operating, general and administrative expenses	'	'	'	23,825	14,821	12,746	276,905	125,889
Depreciation and amortization expense	'	'	'	18,668	19,963	20,842	94,050	34,621
Net income	'	'	'	$90,817	$73,341	$32,509	$44,378	$5,405

Investments_in_NonConsolidated3

Investments in Non-Consolidated Subsidiaries (Details Textual) (USD $)

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Mar. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Nov. 01, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2012

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Ngl Energy Partners Lp [Member]

Glass Mountain Pipeline LLC [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

Crude [Member]

Crude [Member]

Crude [Member]

Subsequent Event [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Partnership Interest [Member]

Partnership Interest [Member]

Limited Partner [Member]

Limited Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

mi

Crude [Member]

in

Crude [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Ngl Energy Partners Lp [Member]

Partnership Interest [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

mi

mi

Co-venturer [Member]

SemStream [Member]

Ngl Energy Partners Lp [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

Business Acquisition, Equity Interests Issued or Issuable [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accumulated Capitalized Interest Costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$3,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Margin deposits

838,000

'

'

'

1,850,000

'

'

'

838,000

1,850,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment in Non Consolidated Subsidiaries (Textual) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain on issuance of common units by equity method investee

26,873,000

0

0

0

'

'

'

'

26,873,000

0

0

'

'

'

'

'

'

26,873,000

'

'

0

'

'

8,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Width of Pipeline

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12

'

'

'

'

'

'

'

'

'

'

Total estimated project costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

'

'

'

'

'

Project funding contributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

95,500,000

2,300,000

'

'

'

'

'

'

'

'

'

General and administrative expenses

'

'

'

'

'

'

'

'

78,597,000

71,918,000

75,447,000

'

1,800,000

2,000,000

3,200,000

'

'

600,000

930,000

7,336,000

16,766,000

13,321,000

9,757,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited partner units owned

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,133,409

'

'

'

'

Common units representing limited partner interests

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

71,216,230

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

51.00%

'

'

51.00%

50.00%

50.00%

'

12.80%

11.78%

11.78%

6.42%

Estimated project contributions in 2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

53,300,000

'

'

'

'

'

'

'

'

'

'

Value of common units acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

315,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Length of pipeline network (in miles)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

624

'

'

'

'

'

'

210

'

'

'

'

'

'

'

'

527

'

'

'

'

'

'

'

Share Price

$65.23

'

'

'

'

'

'

'

$65.23

'

'

'

'

'

'

$34.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity method investments

565,124,000

'

'

'

387,802,000

'

'

'

565,124,000

387,802,000

'

'

'

'

'

'

'

208,848,000

174,398,000

'

356,276,000

213,404,000

'

'

132,181,000

74,434,000

'

'

208,848,000

174,398,000

'

'

184,000,000

224,095,000

138,970,000

'

'

'

'

'

'

'

'

'

Partners' Capital Account, Contributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

57,800,000

74,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Earnings from equity method investments

12,788,000

7,483,000

14,861,000

17,345,000

13,133,000

3,116,000

12,289,000

7,498,000

52,477,000

36,036,000

15,004,000

'

'

'

'

'

'

7,123,000

-403,000

0

45,354,000

36,439,000

15,004,000

'

-105,000

0

0

'

7,123,000

[1]

-403,000

0

'

'

45,459,000

36,439,000

15,004,000

'

'

'

'

'

'

'

'

Additional cash capital contribution

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

$62,021,000

'

'

'

$9,884,000

'

'

'

$62,021,000

$9,884,000

$9,453,000

$107,823,000

'

'

'

'

'

'

'

'

$28,322,000

$0

'

'

$31,000,000

'

'

'

'

'

'

'

'

$8,700,000

'

'

'

'

'

'

'

'

'

'

[1]

* Excluding gain on issuance of common units of $26.9 million.

Acquisitions_Details

Acquisitions (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Aug. 01, 2013	Dec. 31, 2013	Dec. 31, 2012	Aug. 01, 2013
In Thousands, unless otherwise specified					Mid-America Midstream Gas Services, LLC [Member]	SemGas [Member]	SemGas [Member]	SemGas [Member]
								Mid-America Midstream Gas Services, LLC [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Property, plant, and equipment acquired	'	'	'	'	$123,316	'	'	'
Customer contract intangible asset acquired	'	'	'	'	166,332	'	'	'
Goodwill acquired	62,021	9,884	9,453	107,823	'	23,839	0	23,839
Total assets acquired	'	'	'	'	$313,487	'	'	'

Acquisitions_Details_1

Acquisitions (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 02, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 02, 2013
In Thousands, unless otherwise specified					Barcas Field Services, LLC [Member]	Crude [Member]	Crude [Member]	Crude [Member]
								Barcas Field Services, LLC [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Property, plant, and equipment acquired	'	'	'	'	$13,717	'	'	'
Customer contract intangible asset acquired	'	'	'	'	6,930	'	'	'
Goodwill acquired	62,021	9,884	9,453	107,823	'	28,322	0	28,322
Total assets acquired	'	'	'	'	$48,969	'	'	'

Acquisitions_Details_Textual

Acquisitions (Details Textual) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Aug. 01, 2013

Sep. 02, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Nov. 01, 2011

Aug. 01, 2013

Aug. 01, 2013

Dec. 31, 2013

Aug. 01, 2013

Dec. 31, 2013

Jun. 30, 2012

Dec. 31, 2013

Nov. 01, 2011

Sep. 30, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2012

Nov. 01, 2011

Aug. 06, 2013

Mid-America Midstream Gas Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Barcas Field Services, LLC [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Rose Valley I plant [Member]

Rose Valley II plant [Member]

Gathering and processing agreement [Member]

Gathering and processing agreement [Member]

Partnership Interest [Member]

Common Units [Member]

Computer system not purchased [Member]

Acquisitions [Member]

Additional interest acquired [Member]

Senior Notes [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

SemStream [Member]

acre

Trucks

Mid-America Midstream Gas Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Glass Mountain Pipeline Llc [Member]

Ngl Energy Partners Lp [Member]

Barcas Field Services, LLC [Member]

Common Units [Member]

Partnership Interest [Member]

Limited Partner [Member]

Limited Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

mi

Trailers

MMcf

MMcf

Ngl Energy Partners Lp [Member]

Glass Mountain Pipeline Llc [Member]

Ngl Energy Partners Lp [Member]

Partnership Interest [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Acquisitions [Member]

Additional interest acquired [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Ngl Energy Partners Lp [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited partner units owned

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8,932,031

'

'

'

'

9,133,409

'

'

'

'

'

'

Payments to acquire businesses

'

'

$313,487,000

'

$48,969,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction costs expensed

'

'

3,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Length of gathering pipeline acquired

'

'

'

200

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Processing capacity

'

'

'

'

'

'

'

'

'

'

200

200

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net acre dedication acquired

'

'

'

540,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contract tenor

'

'

'

'

'

'

'

'

'

'

'

'

'

'20 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of contract which is fee based

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Post-acquisition capital expenditures related to acquisition

'

'

'

125,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trucks purchased

'

'

'

'

114

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trailers purchased

'

'

'

'

120

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity method investments

565,124,000

387,802,000

'

'

'

132,181,000

74,434,000

208,848,000

174,398,000

184,000,000

'

'

'

'

'

'

'

'

'

'

208,848,000

174,398,000

'

'

'

'

'

'

'

Number of common units received due to dilution

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

201,378

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity method investment, ownership percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

25.00%

'

'

'

'

12.80%

11.78%

11.78%

6.42%

7.50%

5.36%

Senior notes

300,000,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate stated percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.50%

'

'

'

'

'

'

'

'

'

Change in acquisition price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Recovered_Sheet3

Disposals and Impairments of Long-Lived Assets (Details) (USD $)	12 Months Ended				1 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Sep. 30, 2010	Dec. 31, 2012		Dec. 31, 2012
				SemStream Arizona Residential Propane Business [Member]	Crude [Member]	SemStream [Member]		Loss (gain) on impairment or disposal of long-lived assets, net [Member]
				SemStream [Member]	White Cliffs Pipeline, LLC [Member]	SemStream Arizona Residential Propane Business [Member]		Crude [Member]
								White Cliffs Pipeline, LLC [Member]
Gain (loss) on deconsolidation, pre-tax	'	'	'	'	($6,800)	'		$3,500	[1]
Property, plant and equipment	'	'	'	9,400	'	'		'
Cash proceeds from divestiture	0	12,250	93,054	'	'	12,300		'
Gain (loss) on disposal of discontinued operation, pre-tax	'	'	'	'	'	$3,090	[2]	'
[1]	We sold a portion of our ownership interest in White Cliffs during September 2010. At the time, we recorded a loss of $6.8 million on disposal of that asset. In September 2012, we reached a settlement in a dispute concerning the selling price of that ownership interest and reduced the loss by $3.5 million. This $3.5 million gain is reported in "gain on disposal or impairment of long-lived assets, net" in the consolidated statements of operations and comprehensive income (loss).
[2]	On September 12, 2012, we entered into a definitive agreement to sell the assets and liabilities of SemStreambs Arizona residential business which was subject to regulatory approval by the Arizona Corporation Commission (the "ACC"). In early December 2012, the ACC granted SemStream regulatory approval to proceed with the sale. The sale closed on December 31, 2012 and resulted in a gain of $3.1 million on a cash sales price of $12.3 million. The $3.1 million gain is reported in "income from discontinued operations, net of income taxes" in the consolidated statement of operations and comprehensive income (loss). Property, plant, and equipment with a carrying value of $9.4 million represented the majority of assets included in the sale.

Disposals_And_Impairments_of_L2

Disposals And Impairments of Long-Lived Assets (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2011
Loss on goodwill impairment, pre-tax	($47,804,000)
SemStream [Member] | SemStream [Member]	'
Gain on contribution of SemStream assets to NGL energy, pre-tax	44,300,000
SemStream Arizona Residential Propane Business [Member] | SemStream [Member]	'
Gain (Loss) on disposal or impairment of long-lived assets, net, pre-tax	-8,684,000	[1]
Loss on goodwill impairment, pre-tax	-3,600,000
Loss (gain) on impairment or disposal of long-lived assets, net [Member] | SemLogistics [Member]	'
Loss on goodwill impairment, pre-tax	-44,663,000	[2]
Loss (gain) on impairment or disposal of long-lived assets, net [Member] | SemStream [Member] | SemStream [Member]	'
Gain on contribution of SemStream assets to NGL energy, pre-tax	$44,266,000	[3]
[1]	We test all of our goodwill for impairment as of OctoberB 1 of each year. Upon completing this impairment test for 2011, we concluded that the goodwill and other intangible assets attributable to the Arizona residential business of our SemStream segment (which was not contributed to NGL Energy) were impaired. To calculate the impairment loss, we estimated the fair value of this reporting unit using the present value of estimated future cash flows, discounted at a rate of 9.4%, and recorded a full impairment of the $3.6 million balance of goodwill and the $5.0 million balance of other intangible assets associated with customer relationships. No impairment was recorded related to the regulated assets of the Arizona residential business in accordance with ASC 980, "Regulated Operations".
[2]	High crude oil prices and backwardated market conditions in 2011 had a negative effect on SemLogisticbs storage economics. As a result, the demand for storage is depressed and SemLogistics has had difficulty securing contract renewals. SemLogistics successfully passed the initial 2011 goodwill impairment test. However, a review of the sensitivity of the test results indicated that a ten percent reduction in the estimated revenue in 2012 and 2013 would result in a test failure. In addition, we received notice in late January 2012 from two customers that their intentions were not to renew their storage contracts upon expiration. These notifications, coupled with the sensitivity of the test results to loss of revenue, led us to conclude that impairment of the goodwill of SemLogistics was required. Accordingly, we impaired the full amount of goodwill which was $44.7 million at OctoberB 1, 2011.
[3]	On NovemberB 1, 2011, we contributed certain assets and liabilities of our SemStream segment to NGL Energy. On that date these assets and liabilities had the net book values (in thousands) below. However, these values were subject to post closing adjustments, which have since been completed, and resulted in a $2.1 million working capital adjustment.Inventory$107,858Other current assets11,263Property plant and equipment47,756Goodwill50,071Other intangible assets12,408Other noncurrent assets2,818Other current liabilities(2,947)Other noncurrent liabilities(172)Net assets contributed$229,055In return for this contribution, we received $93.0 million of cash and ownership interests in NGL Energy and its general partner with an estimated fair value of $184.0 million. We recorded a gain of $44.3 million on this transaction, which includes the impact of a $2.1 million working capital adjustment and the write-off of $1.6 million of software. Additionally, $2.2 million of capitalized loan fees were written-off as a result of long-term debt payments made from the proceeds of this transaction.

Disposals_And_Impairments_of_L3

Disposals And Impairments of Long-Lived Assets (Details 2) (SemStream [Member], SemStream [Member], USD $)	Nov. 01, 2011
In Thousands, unless otherwise specified
SemStream [Member] | SemStream [Member]	'
Inventory	$107,858
Other current assets	11,263
Property, plant and equipment	47,756
Goodwill	50,071
Other intangible assets	12,408
Other noncurrent assets	2,818
Other current liabilities	-2,947
Other noncurrent liabilities	-172
Net assets contributed	$229,055

Disposals_And_Impairments_of_L4

Disposals And Impairments of Long-Lived Assets (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011
Loss on goodwill impairment, pre-tax	($47,804)

Disposals_And_Impairments_of_L5

Disposals And Impairments of Long-Lived Assets (Details 4) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Goodwill	$62,021	$9,884	$9,453	$107,823

Disposals_And_Impairments_of_L6

Disposals And Impairments of Long-Lived Assets (Details Textual) (USD $)	12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2011	Oct. 02, 2011	Dec. 31, 2011	Nov. 01, 2011
					SemStream [Member]	SemStream [Member]	SemLogistics [Member]	SemLogistics [Member]	SemStream [Member]	SemStream [Member]
						SemStream Arizona Residential Propane Business [Member]	Customer
Loss on goodwill impairment, pre-tax	'	'	($47,804,000)	'	'	($3,600,000)	'	'	'	'
Working capital adjustment	'	'	'	'	'	'	'	'	'	2,100,000
Cash proceeds from divestiture	0	12,250,000	93,054,000	'	'	'	'	'	93,000,000	'
Estimated fair value	'	'	'	'	'	'	'	'	184,000,000	'
Gain on contribution of SemStream assets to NGL energy, pre-tax	'	'	'	'	'	'	'	'	44,300,000	'
Write-off of software	'	'	'	'	1,600,000	'	'	'	'	'
Write-off capitalized loan fees	'	'	'	'	2,200,000	'	'	'	'	'
Present value of estimated future cash flows, discounted rate	'	'	'	'	'	9.40%	'	'	'	'
Impairment of intangible assets	'	'	'	'	'	5,000,000	'	'	'	'
Impairment of long-lived assets held-for-use	'	'	'	'	'	0	'	'	'	'
Number of customers	'	'	'	'	'	'	2	'	'	'
Goodwill	$62,021,000	$9,884,000	$9,453,000	$107,823,000	'	'	'	$44,700,000	'	'

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Income (loss) from discontinued operations, net of income taxes

($6)

($2)

$35

$32

$3,392

($264)

($441)

$252

$59

$2,939

($9,548)

Discontinued Operations [Member]

'

'

'

'

'

'

'

'

'

'

'

External revenue

'

'

'

'

'

'

'

'

0

13,518

14,264

Gain (loss) on disposal of discontinued operation, pre-tax

'

'

'

'

'

'

'

'

0

3,090

-9,196

Income (loss) from discontinued operations before income taxes

'

'

'

'

'

'

'

'

59

2,935

-9,652

Income tax expense

'

'

'

'

'

'

'

'

0

-4

-104

Income (loss) from discontinued operations, net of income taxes

'

'

'

'

'

'

'

'

59

2,939

-9,548

SemStream [Member] | SemStream Arizona Residential Propane Business [Member]

'

'

'

'

'

'

'

'

'

'

'

Gain (loss) on disposal of discontinued operation, pre-tax

'

'

'

'

'

'

'

'

'

$3,090

[1]

'

[1]

On September 12, 2012, we entered into a definitive agreement to sell the assets and liabilities of SemStreambs Arizona residential business which was subject to regulatory approval by the Arizona Corporation Commission (the "ACC"). In early December 2012, the ACC granted SemStream regulatory approval to proceed with the sale. The sale closed on December 31, 2012 and resulted in a gain of $3.1 million on a cash sales price of $12.3 million. The $3.1 million gain is reported in "income from discontinued operations, net of income taxes" in the consolidated statement of operations and comprehensive income (loss). Property, plant, and equipment with a carrying value of $9.4 million represented the majority of assets included in the sale.

Segments_Details

Segments (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	$457,328	$357,748	$324,244	$287,696	$315,837	$277,852	$331,777	$312,031	$1,427,016	$1,237,497	$1,465,246
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	1,020,100	874,885	1,144,439
Operating	'	'	'	'	'	'	'	'	223,585	224,700	155,041
General and administrative	'	'	'	'	'	'	'	'	78,597	71,918	75,447
Depreciation and amortization	'	'	'	'	'	'	'	'	66,409	48,210	49,823
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	-301
Loss (gain) on disposal or impairment of long-lived assets, net	-109	408	-376	-162	-35	-3,615	119	0	-239	-3,531	301
Total expenses	448,687	345,387	311,727	282,651	306,885	267,343	330,887	311,067	1,388,452	1,216,182	1,425,051
Earnings from equity method investments	12,788	7,483	14,861	17,345	13,133	3,116	12,289	7,498	52,477	36,036	15,004
Gain on issuance of common units by equity method investee	26,873	0	0	0	'	'	'	'	26,873	0	0
Operating income (loss)	48,302	19,844	27,378	22,390	22,085	13,625	13,179	8,462	117,914	57,351	55,199
Interest expense (income)	'	'	'	'	'	'	'	'	25,142	8,902	60,138
Other expense (income), net	'	'	'	'	'	'	'	'	44,273	21,569	-14,989
Total other expenses, net	17,646	13,294	10,613	27,862	5,567	11,701	5,587	7,616	69,415	30,471	45,149
Income (loss) from continuing operations before income taxes	30,656	6,550	16,765	-5,472	16,518	1,924	7,592	846	48,499	26,880	10,050
Additions to long-lived assets	'	'	'	'	'	'	'	'	229,318	121,255	66,480
Total assets	2,470,614	'	'	'	1,748,179	'	'	'	2,470,614	1,748,179	'
Equity method investments	565,124	'	'	'	387,802	'	'	'	565,124	387,802	'
SemStream [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	7	608,334
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	0	33	595,434
Operating	'	'	'	'	'	'	'	'	1	-37	6,448
General and administrative	'	'	'	'	'	'	'	'	600	930	7,336
Depreciation and amortization	'	'	'	'	'	'	'	'	0	0	3,501
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	45,821
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	6	214	'
Total expenses	'	'	'	'	'	'	'	'	607	1,140	566,898
Earnings from equity method investments	'	'	'	'	'	'	'	'	7,123	-403	0
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	26,873	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	33,389	-1,536	41,436
Interest expense (income)	'	'	'	'	'	'	'	'	-4,810	-3,449	17,152
Other expense (income), net	'	'	'	'	'	'	'	'	128	-21	-2,112
Total other expenses, net	'	'	'	'	'	'	'	'	-4,682	-3,470	15,040
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	38,071	1,934	26,396
Additions to long-lived assets	'	'	'	'	'	'	'	'	0	0	2,197
Total assets	208,847	'	'	'	175,028	'	'	'	208,847	175,028	'
Equity method investments	208,848	'	'	'	174,398	'	'	'	208,848	174,398	'
SemCAMS [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	198,450	223,219	163,367
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	305	768	218
Operating	'	'	'	'	'	'	'	'	150,319	174,284	110,814
General and administrative	'	'	'	'	'	'	'	'	14,940	14,020	16,816
Depreciation and amortization	'	'	'	'	'	'	'	'	10,766	10,589	10,233
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	8
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	0	0	'
Total expenses	'	'	'	'	'	'	'	'	176,330	199,661	138,073
Earnings from equity method investments	'	'	'	'	'	'	'	'	0	0	0
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	0	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	22,120	23,558	25,294
Interest expense (income)	'	'	'	'	'	'	'	'	18,928	18,727	24,685
Other expense (income), net	'	'	'	'	'	'	'	'	-20	14	-2,811
Total other expenses, net	'	'	'	'	'	'	'	'	18,908	18,741	21,874
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	3,212	4,817	3,420
Additions to long-lived assets	'	'	'	'	'	'	'	'	56,122	13,340	4,874
Total assets	306,001	'	'	'	302,143	'	'	'	306,001	302,143	'
Equity method investments	0	'	'	'	0	'	'	'	0	0	'
SemGas [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	231,119	127,870	105,248
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	169,800	100,677	75,066
Operating	'	'	'	'	'	'	'	'	20,200	12,712	9,027
General and administrative	'	'	'	'	'	'	'	'	7,971	6,195	6,521
Depreciation and amortization	'	'	'	'	'	'	'	'	14,517	7,043	5,986
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	-4
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	665	46	'
Total expenses	'	'	'	'	'	'	'	'	213,153	126,673	96,604
Earnings from equity method investments	'	'	'	'	'	'	'	'	0	0	0
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	0	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	17,966	1,197	8,644
Interest expense (income)	'	'	'	'	'	'	'	'	3,268	1,461	2,346
Other expense (income), net	'	'	'	'	'	'	'	'	-3	0	-10
Total other expenses, net	'	'	'	'	'	'	'	'	3,265	1,461	2,336
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	14,701	-264	6,308
Additions to long-lived assets	'	'	'	'	'	'	'	'	97,021	47,140	14,952
Total assets	552,095	'	'	'	133,864	'	'	'	552,095	133,864	'
Equity method investments	0	'	'	'	0	'	'	'	0	0	'
SemLogistics [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	11,671	12,341	23,314
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	380	196	152
Operating	'	'	'	'	'	'	'	'	7,444	5,921	6,206
General and administrative	'	'	'	'	'	'	'	'	5,854	5,652	6,712
Depreciation and amortization	'	'	'	'	'	'	'	'	9,426	9,780	9,271
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	-44,663
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	0	0	'
Total expenses	'	'	'	'	'	'	'	'	23,104	21,549	67,004
Earnings from equity method investments	'	'	'	'	'	'	'	'	0	0	0
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	0	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	-11,433	-9,208	-43,690
Interest expense (income)	'	'	'	'	'	'	'	'	1,435	2,486	1,005
Other expense (income), net	'	'	'	'	'	'	'	'	-400	-420	46
Total other expenses, net	'	'	'	'	'	'	'	'	1,035	2,066	1,051
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	-12,468	-11,274	-44,741
Additions to long-lived assets	'	'	'	'	'	'	'	'	2,071	1,188	5,313
Total assets	168,835	'	'	'	174,218	'	'	'	168,835	174,218	'
Equity method investments	0	'	'	'	0	'	'	'	0	0	'
SemMexico [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	242,559	263,870	218,187
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	209,841	236,851	192,068
Operating	'	'	'	'	'	'	'	'	9,379	7,677	5,006
General and administrative	'	'	'	'	'	'	'	'	10,700	9,433	11,560
Depreciation and amortization	'	'	'	'	'	'	'	'	5,991	6,171	6,502
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	200
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	-854	-290	'
Total expenses	'	'	'	'	'	'	'	'	235,057	259,842	214,936
Earnings from equity method investments	'	'	'	'	'	'	'	'	0	0	0
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	0	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	7,502	4,028	3,251
Interest expense (income)	'	'	'	'	'	'	'	'	188	314	365
Other expense (income), net	'	'	'	'	'	'	'	'	-652	-38	-173
Total other expenses, net	'	'	'	'	'	'	'	'	-464	276	192
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	7,966	3,752	3,059
Additions to long-lived assets	'	'	'	'	'	'	'	'	6,375	3,396	4,667
Total assets	104,154	'	'	'	94,594	'	'	'	104,154	94,594	'
Equity method investments	0	'	'	'	0	'	'	'	0	0	'
Corporate and other [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	-23,985	-10,607	-84,525
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	-23,985	-10,606	-84,764
Operating	'	'	'	'	'	'	'	'	0	0	70
General and administrative	'	'	'	'	'	'	'	'	21,766	22,367	16,745
Depreciation and amortization	'	'	'	'	'	'	'	'	2,001	2,496	2,951
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	-1,599
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	0	0	'
Total expenses	'	'	'	'	'	'	'	'	-218	14,257	-63,399
Earnings from equity method investments	'	'	'	'	'	'	'	'	0	0	0
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	0	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	-23,767	-24,864	-21,126
Interest expense (income)	'	'	'	'	'	'	'	'	-8,790	-10,228	10,836
Other expense (income), net	'	'	'	'	'	'	'	'	45,234	22,003	-8,329
Total other expenses, net	'	'	'	'	'	'	'	'	36,444	11,775	2,507
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	-60,211	-36,639	-23,633
Additions to long-lived assets	'	'	'	'	'	'	'	'	734	14,827	2,080
Total assets	60,198	'	'	'	97,192	'	'	'	60,198	97,192	'
Equity method investments	0	'	'	'	0	'	'	'	0	0	'
Crude [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	767,202	620,797	431,321
Costs of products sold, exclusive of depreciation and amortization shown below	'	'	'	'	'	'	'	'	663,759	546,966	366,265
Operating	'	'	'	'	'	'	'	'	36,242	24,143	17,470
General and administrative	'	'	'	'	'	'	'	'	16,766	13,321	9,757
Depreciation and amortization	'	'	'	'	'	'	'	'	23,708	12,131	11,379
Gain (Loss) on Sale of Assets and Asset Impairment Charges	'	'	'	'	'	'	'	'	'	'	-64
Loss (gain) on disposal or impairment of long-lived assets, net	'	'	'	'	'	'	'	'	-56	-3,501	'
Total expenses	'	'	'	'	'	'	'	'	740,419	593,060	404,935
Earnings from equity method investments	'	'	'	'	'	'	'	'	45,354	36,439	15,004
Gain on issuance of common units by equity method investee	'	'	'	'	'	'	'	'	0	'	'
Operating income (loss)	'	'	'	'	'	'	'	'	72,137	64,176	41,390
Interest expense (income)	'	'	'	'	'	'	'	'	14,923	-409	3,749
Other expense (income), net	'	'	'	'	'	'	'	'	-14	31	-1,600
Total other expenses, net	'	'	'	'	'	'	'	'	14,909	-378	2,149
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	57,228	64,554	39,241
Additions to long-lived assets	'	'	'	'	'	'	'	'	66,995	41,364	32,397
Total assets	1,070,484	'	'	'	771,140	'	'	'	1,070,484	771,140	'
Equity method investments	356,276	'	'	'	213,404	'	'	'	356,276	213,404	'
Intersegment Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	0	0
Intersegment Eliminations [Member] | SemStream [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	0	46,738
Intersegment Eliminations [Member] | SemCAMS [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	0	0
Intersegment Eliminations [Member] | SemGas [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	23,985	10,606	38,588
Intersegment Eliminations [Member] | SemLogistics [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	0	0
Intersegment Eliminations [Member] | SemMexico [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	0	0
Intersegment Eliminations [Member] | Corporate and other [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	-23,985	-10,606	-85,326
Intersegment Eliminations [Member] | Crude [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	0	0
Operating Segments [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	1,427,016	1,237,497	1,465,246
Operating Segments [Member] | SemStream [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	7	561,596
Operating Segments [Member] | SemCAMS [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	198,450	223,219	163,367
Operating Segments [Member] | SemGas [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	207,134	117,264	66,660
Operating Segments [Member] | SemLogistics [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	11,671	12,341	23,314
Operating Segments [Member] | SemMexico [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	242,559	263,870	218,187
Operating Segments [Member] | Corporate and other [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	0	-1	801
Operating Segments [Member] | Crude [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information	'	'	'	'	'	'	'	'	'	'	'
Revenue	'	'	'	'	'	'	'	'	$767,202	$620,797	$431,321

Segments_Details_1

Segments (Details 1) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income tax expense (benefit)	$24,051	$3,413	$9,288	($54,006)	($3,066)	$2,092	($92)	($1,012)	($17,254)	($2,078)	($2,310)
SemCAMS [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income tax expense (benefit)	'	'	'	'	'	'	'	'	6,348	720	552
SemLogistics [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income tax expense (benefit)	'	'	'	'	'	'	'	'	-5,699	-7,736	-3,331
SemMexico [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income tax expense (benefit)	'	'	'	'	'	'	'	'	2,589	2,285	629
Corporate and other [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income tax expense (benefit)	'	'	'	'	'	'	'	'	($20,492)	$2,653	($160)

Inventories_Details

Inventories (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Crude oil	$30,779	$24,840
Asphalt and other	13,516	9,593
Inventories	$44,295	$34,433

Other_Assets_Details

Other Assets (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Other Assets [Abstract]	'	'
Product prepayments	$779	$1,550
Other prepaid expenses	4,917	13,593
Margin deposits	838	1,850
Deferred tax asset	7,325	875
Other	152	648
Total other current assets	$14,011	$18,516

Other_Assets_Details_1

Other Assets (Details 1) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Other Assets [Abstract]	'		'
Debt issuance costs, net	$17,149	[1]	$4,945	[1]
Deferred tax asset	2,832		0
Other	8,908		3,236
Total other noncurrent assets, net	$28,889		$8,181
[1]	* See Note 16 for discussion of debt issuance costs.

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	$1,294,448	$945,610
Accumulated depreciation	-188,720	-130,886
Property, plant and equipment, net	1,105,728	814,724
Land [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	72,484	53,491
Pipelines and related facilities [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	312,730	206,345
Storage and terminal facilities [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	281,819	268,738
Natural gas gathering and processing facilities [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	347,962	280,750
Linefill [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	14,701	13,158
Office and other property and equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	65,679	47,679
Construction-in-progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment, gross	$199,073	$75,449

Property_Plant_and_Equipment_D1

Property, Plant and Equipment (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]	'	'	'
Depreciation	$60.40	$46.20	$45.90
Capitalized interest costs	$4.30	$0.80	'

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Sep. 02, 2013

Aug. 01, 2013

In Thousands, unless otherwise specified

Crude [Member]

Crude [Member]

SemGas [Member]

SemGas [Member]

SemMexico [Member]

SemMexico [Member]

Barcas Field Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Crude [Member]

SemGas [Member]

Goodwill [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

$62,021

$9,884

$9,453

$107,823

$28,322

$0

$23,839

$0

$9,860

$9,884

$28,322

$23,839

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details 1) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Sep. 02, 2013

Dec. 31, 2013

Aug. 01, 2013

SemStream [Member]

Crude [Member]

Crude [Member]

SemGas [Member]

SemGas [Member]

Barcas Field Services, LLC [Member]

Barcas Field Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

Crude [Member]

Crude [Member]

SemGas [Member]

SemGas [Member]

Goodwill [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, Beginning Balance

$9,884

$9,453

$107,823

'

$28,322

$0

$23,839

$0

'

$28,322

'

$23,839

Impairments

'

'

-47,804

'

'

'

'

'

'

'

'

'

Goodwill, Written off Related to Sale of Business Unit

'

'

'

-50,071

'

'

'

'

'

'

'

'

Currency translation adjustments

-24

431

-495

'

'

'

'

'

'

'

'

'

Goodwill, Acquired During Period

'

'

'

'

'

'

'

'

28,322

'

23,839

'

Goodwill, Ending Balance

$62,021

$9,884

$9,453

'

$28,322

$0

$23,839

$0

'

$28,322

'

$23,839

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Other intangible assets	$174,838	$7,585
Crude [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Other intangible assets	5,775	0
SemGas [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Other intangible assets	163,144	0
SemMexico [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Other intangible assets	5,888	7,549
Corporate and other [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Other intangible assets	$31	$36

Goodwill_and_Other_Intangible_5

Goodwill and Other Intangible Assets (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-Lived Intangible Assets, Net, beginning balance	$7,585	$8,950	$32,264
Amortization	-6,018	-2,017	-4,664
Impairment	'	'	-5,048
Reduction to other intangible assets	'	'	-12,408
Currency translation adjustments	9	652	-1,194
Finite-Lived Intangible Assets, Net, ending balance	174,838	7,585	8,950
Barcas Field Services, LLC [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Customer contract intangible asset acquired	6,930	'	'
Mid-America Midstream Gas Services, LLC [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Customer contract intangible asset acquired	$166,332	'	'

Goodwill_and_Other_Intangible_6

Goodwill and Other Intangible Assets (Details 4) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Goodwill And Other Intangible Assets [Abstract]	'	'	'	'
For year ending, December 31, 2013	$13,113	'	'	'
For year ending, December 31, 2014	11,687	'	'	'
For year ending, December 31, 2015	9,164	'	'	'
For year ending, December 31, 2016	8,996	'	'	'
For year ending, December 31, 2017	8,863	'	'	'
Thereafter	123,015	'	'	'
Total estimated amortization expense	$174,838	$7,585	$8,950	$32,264

Goodwill_and_Other_Intangible_7

Goodwill and Other Intangible Assets (Details Textual) (USD $)

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Oct. 02, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Sep. 02, 2013

Aug. 01, 2013

NGL Energy [Member]

White Cliffs Pipeline, LLC [Member]

Glass Mountain Pipeline Llc [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

Customer Relationships [Member]

Unpatented Technology [Member]

Barcas Field Services, LLC [Member]

Mid-America Midstream Gas Services, LLC [Member]

SemMexico [Member]

Goodwill [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, Amortization Period for Income Taxes

'15 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

$62,021

$9,884

$9,453

$107,823

$82,200

$8,700

$31,000

$9,860

'

$9,884

'

'

'

'

Fair value in excess of carrying value

'

'

'

'

'

'

'

'

11.70%

'

'

'

'

'

Goodwill impairment tests, period of estimates of cash flow, maximum, years

'

'

'

'

'

'

'

'

'18 years

'

'

'

'

'

Assumed terminal growth rate

'

'

'

'

'

'

'

'

3.00%

'

'

'

'

'

Weighted average cost of capital

'

'

'

'

'

'

'

'

13.00%

'

'

'

'

'

Finite-lived intangible assets

174,838

7,585

8,950

32,264

'

'

'

'

'

'

172,800

1,800

'

'

Customer contract intangible asset acquired

'

'

'

'

'

'

'

'

'

'

'

'

$6,930

$166,332

Financial_Instruments_and_Conc2

Financial Instruments and Concentrations of Risk (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value of Financial Assets and Liabilities	'		'
Total assets	$0		$0
Total liabilities	58,194		33,892
Derivative, Fair Value, Net	-58,194		-33,892
Level 1 [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total assets	36		22
Total liabilities	58,230		33,914
Derivative, Fair Value, Net	-58,194		-33,892
Netting [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total assets	-36	[1]	-22	[1]
Total liabilities	-36	[1]	-22	[1]
Derivative, Fair Value, Net	0	[1]	0	[1]
Commodity Derivatives [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total assets	0		0
Total liabilities	60		1,034
Commodity Derivatives [Member] | Level 1 [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total assets	36		22
Total liabilities	96		1,056
Commodity Derivatives [Member] | Netting [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total assets	-36	[1]	-22	[1]
Total liabilities	-36	[1]	-22	[1]
Warrants [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total liabilities	58,134		32,858
Warrants [Member] | Level 1 [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total liabilities	58,134		32,858
Warrants [Member] | Netting [Member]	'		'
Fair Value of Financial Assets and Liabilities	'		'
Total liabilities	'		$0
[1]	Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.

Financial_Instruments_and_Conc3

Financial Instruments and Concentrations of Risk (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'		'
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	$0		$0		$0		($17,739)
Schedule of Changes in Fair Value of Financial Assets (Liabilities) Classified as Level 3	'		'		'		'
Transfers out of Level 3	0	[1]	0	[1]	8,515	[1]	'
Total realized and unrealized gain (loss) included in earnings	0	[2]	0	[2]	11,041	[2]	'
Settlements	0		0		-1,817		'
Amount of total gain or loss included in earnings for the period attributable to the change in unrealized gain or loss relating to assets and liabilities still held at the reporting date	0		0		0		'
Commodity Derivatives [Member]	'		'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'		'
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	0		0		0		-547
Schedule of Changes in Fair Value of Financial Assets (Liabilities) Classified as Level 3	'		'		'		'
Transfers out of Level 3	0	[1]	0	[1]	-419	[1]	'
Total realized and unrealized gain (loss) included in earnings	0	[2]	0	[2]	2,783	[2]	'
Settlements	0		0		-1,817		'
Amount of total gain or loss included in earnings for the period attributable to the change in unrealized gain or loss relating to assets and liabilities still held at the reporting date	0		0		0		'
Warrants [Member]	'		'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'		'
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	0		0		0		-17,192
Schedule of Changes in Fair Value of Financial Assets (Liabilities) Classified as Level 3	'		'		'		'
Transfers out of Level 3	0	[1]	0	[1]	8,934	[1]	'
Total realized and unrealized gain (loss) included in earnings	0	[2]	0	[2]	8,258	[2]	'
Settlements	0		0		0		'
Amount of total gain or loss included in earnings for the period attributable to the change in unrealized gain or loss relating to assets and liabilities still held at the reporting date	$0		$0		$0		'
[1]	In these tables, transfers in and transfers out are recognized as of the beginning of the reporting period for commodity derivatives and as of the transfer date for warrants.
[2]	Gains and losses related to commodity derivatives are reported in product revenue. Gains and losses related to warrants are recorded in other expense (income).

Financial_Instruments_and_Conc4

Financial Instruments and Concentrations of Risk (Details 2)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	bbl	bbl
Sales [Member]	'	'
Derivative, Nonmonetary Notional Amount, Volume	2,595,000	1,743,000
Purchases [Member]	'	'
Derivative, Nonmonetary Notional Amount, Volume	2,575,000	1,636,000

Financial_Instruments_and_Conc5

Financial Instruments and Concentrations of Risk (Details 3) (USD $)	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013
In Thousands, unless otherwise specified	Other Current Assets [Member]	Other Current Liabilities [Member]	Commodity Contract [Member]	Commodity Contract [Member]
			Other Current Assets [Member]	Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]	'	'	'	'
Derivative Asset	$0	'	$0	'
Derivative Liability	'	$1,034	'	$60

Financial_Instruments_and_Conc6

Financial Instruments and Concentrations of Risk (Details 4) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value Disclosures [Abstract]	'	'	'
Realized and unrealized gains (losses) from commodity derivatives	($1,593)	$149	$2,153

Financial_Instruments_and_Conc7

Financial Instruments and Concentrations of Risk (Details 5) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Concentration of net assets outside of the U.S.	'	'	'	'
Cash and cash equivalents	$79,351	$80,029	$73,613	$87,821
Other current assets	14,011	18,516	'	'
Total assets	2,470,614	1,748,179	'	'
Current liabilities	499,214	374,344	'	'
Outside Of United States [Member]	'	'	'	'
Concentration of net assets outside of the U.S.	'	'	'	'
Cash and cash equivalents	62,928	'	'	'
Other current assets	108,119	'	'	'
Noncurrent assets	423,202	'	'	'
Total assets	594,249	'	'	'
Current liabilities	80,362	'	'	'
Noncurrent liabilities	94,083	'	'	'
Total liabilities	174,445	'	'	'
Net assets	419,804	'	'	'
Canada [Member]	'	'	'	'
Concentration of net assets outside of the U.S.	'	'	'	'
Cash and cash equivalents	49,221	'	'	'
Other current assets	59,472	'	'	'
Noncurrent assets	212,567	'	'	'
Total assets	321,260	'	'	'
Current liabilities	51,124	'	'	'
Noncurrent liabilities	70,392	'	'	'
Total liabilities	121,516	'	'	'
Net assets	199,744	'	'	'
United Kingdom [Member]	'	'	'	'
Concentration of net assets outside of the U.S.	'	'	'	'
Cash and cash equivalents	1,845	'	'	'
Other current assets	2,896	'	'	'
Noncurrent assets	164,094	'	'	'
Total assets	168,835	'	'	'
Current liabilities	1,788	'	'	'
Noncurrent liabilities	21,826	'	'	'
Total liabilities	23,614	'	'	'
Net assets	145,221	'	'	'
Mexico [Member]	'	'	'	'
Concentration of net assets outside of the U.S.	'	'	'	'
Cash and cash equivalents	11,862	'	'	'
Other current assets	45,751	'	'	'
Noncurrent assets	46,541	'	'	'
Total assets	104,154	'	'	'
Current liabilities	27,450	'	'	'
Noncurrent liabilities	1,865	'	'	'
Total liabilities	29,315	'	'	'
Net assets	$74,839	'	'	'

Financial_Instruments_and_Conc8

Financial Instruments and Concentrations of Risk (Details Textual) (USD $)

12 Months Ended

12 Months Ended

1 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jan. 30, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Mar. 31, 2012

Unionized Employees Concentration Risk [Member]

Unionized Employees Concentration Risk [Member]

Unionized Employees Concentration Risk [Member]

Unionized Employees Concentration Risk [Member]

Sales Revenue, Goods, Net [Member]

Sales Revenue, Goods, Net [Member]

Sales Revenue, Goods, Net [Member]

Sales Revenue, Goods, Net [Member]

Accounts Receivable [Member]

Accounts Receivable [Member]

Interest Rate Swap [Member]

employees

Outside Of United States [Member]

Canada And Mexico [Member]

Canada And Mexico [Member]

Customer

Customer

Crude [Member]

Customer Concentration Risk [Member]

Customer Concentration Risk [Member]

Customer Concentration Risk [Member]

employees

employees

employees

Customer

SemCrude [Member]

Crude [Member]

SemCrude [Member]

Customer

Customer

Margin deposits

$838,000

$1,850,000

'

'

'

'

'

'

'

'

'

'

'

'

Derivative, Gain (Loss) on Derivative, Net

-1,593,000

149,000

2,153,000

'

'

'

'

'

'

'

'

'

'

400,000

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000

Number of customers

'

'

'

'

'

'

'

0

0

1

'

1

1

'

Percentage of accounts receivables

'

'

'

'

'

'

'

'

'

'

17.00%

16.00%

16.00%

'

Number of employees

'

'

'

890

500

110

'

'

'

'

'

'

'

'

Number of employees with contracts expiring in collective bargaining agreements

'

'

'

'

'

60

'

'

'

'

'

'

'

'

Number of employees with contracts renewing collective bargaining agreements

'

'

'

'

'

'

50

'

'

'

'

'

'

'

Derivative Asset, Fair Value, Amount Offset Against Collateral

$800,000

$800,000

'

'

'

'

'

'

'

'

'

'

'

'

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
U.S.	'	'	'	'	'	'	'	'	$40,002	$21,498	$39,936
Foreign	'	'	'	'	'	'	'	'	8,497	5,382	-29,886
Income (loss) from continuing operations before income taxes	$30,656	$6,550	$16,765	($5,472)	$16,518	$1,924	$7,592	$846	$48,499	$26,880	$10,050

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Deferred income tax provision (benefit)	'	'	'	'	'	'	'	'	($36,274)	($11,818)	($9,847)
Provision (benefit) for income taxes	24,051	3,413	9,288	-54,006	-3,066	2,092	-92	-1,012	-17,254	-2,078	-2,310
Continuing Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Foreign	'	'	'	'	'	'	'	'	15,546	9,662	7,427
U.S. federal	'	'	'	'	'	'	'	'	2,067	0	0
U.S. state	'	'	'	'	'	'	'	'	1,435	74	4
Current income tax provision (benefit)	'	'	'	'	'	'	'	'	19,048	9,736	7,431
Foreign	'	'	'	'	'	'	'	'	-10,222	-12,070	-7,252
U.S. federal	'	'	'	'	'	'	'	'	-23,756	222	-2,159
U.S. state	'	'	'	'	'	'	'	'	-2,324	34	-330
Deferred income tax provision (benefit)	'	'	'	'	'	'	'	'	-36,302	-11,814	-9,741
Provision (benefit) for income taxes	'	'	'	'	'	'	'	'	($17,254)	($2,078)	($2,310)

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Income (loss) from continuing operations before income taxes	$30,656	$6,550	$16,765	($5,472)	$16,518	$1,924	$7,592	$846	$48,499	$26,880	$10,050
U.S. federal statutory rate	'	'	'	'	'	'	'	'	35.00%	35.00%	35.00%
Provision at statutory rate	'	'	'	'	'	'	'	'	16,975	9,408	3,518
State income taxesbnet of federal benefit	'	'	'	'	'	'	'	'	-577	71	-221
Effect of rates other than statutory	'	'	'	'	'	'	'	'	-1,041	-829	-1,360
Effect of U.S. taxation on foreign branches	'	'	'	'	'	'	'	'	2,974	1,883	-10,460
Foreign tax adjustment, prior years	'	'	'	'	'	'	'	'	4,533	0	0
Impairment of goodwill	'	'	'	'	'	'	'	'	0	0	15,745
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount	'	'	'	'	'	'	'	'	24,625	0	0
Noncontrolling interest	'	'	'	'	'	'	'	'	6,096	3,429	0
Foreign tax credit and offset to branch deferreds	'	'	'	'	'	'	'	'	-2,876	-12,360	9,339
Impact of valuation allowance on deferred tax assets	'	'	'	'	'	'	'	'	-53,218	6,233	-16,421
Other, net	'	'	'	'	'	'	'	'	-2,553	-3,055	-2,450
Provision (benefit) for income taxes	$24,051	$3,413	$9,288	($54,006)	($3,066)	$2,092	($92)	($1,012)	($17,254)	($2,078)	($2,310)

Income_Taxes_Details_4

Income Taxes (Details 4) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Components of Deferred Tax Assets [Abstract]	'	'
Net operating loss and other credit carryforwards	$9,498	$47,910
Compensation and benefits	7,991	1,573
Inventories	118	96
Intangible assets	44,444	52,444
Pension plan	2,849	3,384
Allowance for doubtful accounts	2,140	2,507
Deferred revenue	5,910	3,925
Foreign tax credit and offset to branch deferreds	95,435	92,559
Other	8,243	16,046
less: valuation allowance	-95,438	-155,757
Net deferred tax assets	81,190	64,687
Components of Deferred Tax Liabilities [Abstract]	'	'
Intangible assets	-6,927	-8,952
Prepaid expenses	-153	-150
Property, plant and equipment	-113,030	-78,413
Equity Investment in partnerships	-49,720	-36,749
Other	-1,471	-5,876
Total deferred tax liabilities	-171,301	-130,140
Net deferred tax assets (liabilities)	($90,111)	($65,453)

Income_Taxes_Details_Textual

Income Taxes (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]	'
Federal net operating loss	$10.90
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	40
U.S. Capital losses	16.1
Forgein income tax credits	44.6
Change in valuation allowance	-60.3
Decrease caused by recognition of discrete tax benefits for federal and state NOLs [Member]	'
Operating Loss Carryforwards [Line Items]	'
Change in valuation allowance	52.5
Net increase for foreign tax credits and offset to branch deferreds [Member]	'
Operating Loss Carryforwards [Line Items]	'
Change in valuation allowance	2.9
Decrease due to reclassification of prior warrant expense as non-deductible for tax [Member]	'
Operating Loss Carryforwards [Line Items]	'
Change in valuation allowance	$10.70

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Senior notes	$300,000,000	$0
Capital leases	125,000	86,000
Total long-term debt	615,125,000	206,086,000
less: current portion of long-term debt	37,000	24,000
Noncurrent portion of long-term debt	615,088,000	206,062,000
SemGroup corporate revolving credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Total long-term debt	70,000,000	'
Rose Rock Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Borrowings	245,000,000	4,500,000
Total long-term debt	245,000,000	'
SemLogistics credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Borrowings	0	0
SemMexico credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Total long-term debt	0	'
Corporate Segment [Member] | SemGroup corporate revolving credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Borrowings	'	201,500,000
SemMexico [Member] | SemMexico credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Borrowings	$0	$0

LongTerm_Debt_LongTerm_Debt_De

Long-Term Debt Long-Term Debt (Details 1)	12 Months Ended
	Dec. 31, 2013
2016 Redemption [Member]	'
Debt Instrument [Line Items]	'
Early redemption premium	105.63%
2017 Redemption [Member]	'
Debt Instrument [Line Items]	'
Early redemption premium	103.75%
2018 Redemption [Member]	'
Debt Instrument [Line Items]	'
Early redemption premium	101.88%
2019 Redemption and Thereafter [Member]	'
Debt Instrument [Line Items]	'
Early redemption premium	100.00%

LongTerm_Debt_Details_2

Long-Term Debt (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Scheduled principal payments in the next twelve months	$37	'
Scheduled principal payments, year two	39	'
Scheduled principal payments, year three	21	'
Scheduled principal payments, year four	15	'
Scheduled principal payments, year five	315,013	'
Scheduled principal payments, thereafter	300,000	'
Total long-term debt	615,125	206,086
SemGroup corporate revolving credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Scheduled principal payments in the next twelve months	0	'
Scheduled principal payments, year two	0	'
Scheduled principal payments, year three	0	'
Scheduled principal payments, year four	0	'
Scheduled principal payments, year five	70,000	'
Scheduled principal payments, thereafter	0	'
Total long-term debt	70,000	'
Rose Rock Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Scheduled principal payments in the next twelve months	0	'
Scheduled principal payments, year two	0	'
Scheduled principal payments, year three	0	'
Scheduled principal payments, year four	0	'
Scheduled principal payments, year five	245,000	'
Scheduled principal payments, thereafter	0	'
Total long-term debt	245,000	'
SemMexico credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Scheduled principal payments in the next twelve months	0	'
Scheduled principal payments, year two	0	'
Scheduled principal payments, year three	0	'
Scheduled principal payments, year four	0	'
Scheduled principal payments, year five	0	'
Scheduled principal payments, thereafter	0	'
Total long-term debt	0	'
Capital Leases [Member]	'	'
Debt Instrument [Line Items]	'	'
Scheduled principal payments in the next twelve months	37	'
Scheduled principal payments, year two	39	'
Scheduled principal payments, year three	21	'
Scheduled principal payments, year four	15	'
Scheduled principal payments, year five	13	'
Scheduled principal payments, thereafter	0	'
Total long-term debt	125	'
Senior Notes [Member]	'	'
Debt Instrument [Line Items]	'	'
Scheduled principal payments in the next twelve months	0	'
Scheduled principal payments, year two	0	'
Scheduled principal payments, year three	0	'
Scheduled principal payments, year four	0	'
Scheduled principal payments, year five	0	'
Scheduled principal payments, thereafter	300,000	'
Total long-term debt	$300,000	'

LongTerm_Debt_Details_Textual

Long-Term Debt (Details Textual)

12 Months Ended

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2011

Nov. 30, 2009

Dec. 31, 2011

Jun. 30, 2011

Dec. 31, 2011

Dec. 31, 2011

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Jan. 13, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Mar. 31, 2012

Mar. 31, 2012

Mar. 31, 2012

Mar. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Aug. 31, 2012

Aug. 31, 2012

Jun. 30, 2011

Jun. 30, 2011

Dec. 31, 2013

USD ($)

USD ($)

USD ($)

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Semgroup Corporation Term Loan And Revolving Credit Facilities [Member]

Semgroup Corporation Term Loan And Revolving Credit Facilities [Member]

Semgroup Corporation Term Loan And Revolving Credit Facilities [Member]

Semgroup Corporation Term Loan And Revolving Credit Facilities [Member]

Semgroup Corporation Term Loan And Revolving Credit Facilities [Member]

Semgroup Corporation Term Loan And Revolving Credit Facilities [Member]

Interest Rate Swap [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Senior Notes [Member]

sale of stock [Member]

Debt issuance [Member]

During a temporary period subsequent to certain acquisitions [Member]

Possible alternative covenants subsequent to unsecured debt issuance [Member]

Possible alternative covenants subsequent to unsecured debt issuance [Member]

Possible alternative covenants subsequent to unsecured debt issuance [Member]

SemLogistics [Member]

SemLogistics [Member]

SemLogistics [Member]

SemLogistics [Member]

SemLogistics [Member]

SemLogistics [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

SemMexico [Member]

Level 1 [Member]

Alternate Base Rate Borrowings [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

USD ($)

USD ($)

Term Loan [Member]

Term Loan [Member]

Minimum [Member]

Maximum [Member]

USD ($)

Bilateral Letter of Credit [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum net debt to EBITDA ratio [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Minimum EBITDA to interest expense ratio [Member]

USD ($)

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

USD ($)

USD ($)

Term Loan [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Cash Flow Hedging [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Letter of Credit [Member]

Letter of Credit [Member]

USD ($)

USD ($)

USD ($)

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

USD ($)

Alternate Base Rate Borrowings [Member]

Eurodollar Rate Borrowings [Member]

Alternate Base Rate Borrowings [Member]

Eurodollar Rate Borrowings [Member]

USD ($)

Alternate Base Rate Borrowings [Member]

Letter of Credit [Member]

Eurodollar Rate Borrowings [Member]

Alternate Base Rate Borrowings [Member]

Letter of Credit [Member]

Eurodollar Rate Borrowings [Member]

USD ($)

USD ($)

USD ($)

USD ($)

Alternate Base Rate Borrowings [Member]

Letter of Credit [Member]

Minimum [Member]

Maximum [Member]

Subordinated Debt [Member]

Maximum net debt to EBITDA ratio [Member]

Maximum net debt to EBITDA ratio [Member]

Maximum senior secured debt to EBITDA ratio [Member]

Minimum EBITDA to interest expense ratio [Member]

GBP (£)

USD ($)

GBP (£)

Interest Rate Swap [Member]

USD ($)

USD ($)

USD ($)

Alternate Base Rate Borrowings [Member]

Eurodollar [Member]

Minimum [Member]

Maximum [Member]

USD ($)

Maximum [Member]

USD ($)

MXN

Letter of Credit [Member]

Letter of Credit [Member]

Additional Credit Agreement [Member]

Additional Credit Agreement [Member]

Additional Credit Agreement [Member]

Additional Credit Agreement [Member]

Additional Credit Agreement [Member]

Additional Credit Agreement [Member]

Additional Credit Agreement [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

MXN

USD ($)

MXN

USD ($)

MXN

USD ($)

MXN

Debt Instrument [Line Items]

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'

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'

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%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior notes

$300,000,000

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long Term Debt (Textual) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capacity of revolving credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

585,000,000

150,000,000

'

385,000,000

'

150,000,000

'

'

'

'

'

'

'

'

'

'

'

'

15,000,000

24,700,000

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Incremental Increases

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum aggregate issuance to elect alternative financial covenants

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

500,000,000

'

250,000,000

'

'

'

3,400,000

44,000,000

'

'

4,300,000

56,000,000

'

4,300,000

56,000,000

6,100,000

80,000,000

'

Borrowings outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

245,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

70,000,000

'

'

30,000,000

40,000,000

'

'

'

'

'

'

'

0

'

'

'

0

'

'

'

'

'

'

'

Capitalized costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of Incurred Interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

61,300,000

'

'

'

'

'

'

'

'

'

'

'

'

34,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,000,000

'

'

'

'

'

'

22,400,000

292,800,000

'

'

'

'

'

'

'

'

Margin added to LIBOR for determining effective interest rate

'

'

'

1.00%

'

'

'

'

1.50%

'

'

'

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Margin added to alternate base rate

'

'

'

'

1.00%

'

2.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Facility fee

'

'

'

'

'

'

'

'

400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Base facility interest rate

'

'

'

'

'

'

'

'

7.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LIBOR rate threshold used to determining margin

'

'

'

'

'

'

'

'

1.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fees charged on prefunded tranche

'

'

'

'

'

'

'

'

'

'

'

'

7.00%

8.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Margin added to Federal Funds Effective Rate to determine effective interest rate

'

'

'

0.50%

'

'

'

'

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prime rate used to determine interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Margin added to Prime Rate to determine effective interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

2.00%

'

'

1.70%

1.70%

1.70%

'

'

'

'

'

Interest rate in effect

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.75%

'

'

'

'

'

'

'

'

'

'

'

'

1.75%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

'

'

4.75%

2.66%

2.00%

3.25%

'

'

'

'

'

'

'

0.50%

0.50%

'

'

'

'

'

'

'

'

LIBOR rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.16%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, applicable margin percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.75%

'

1.75%

2.00%

'

3.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

0.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fees charged on outstanding letters of credit effect rate

'

'

'

'

'

2.00%

'

3.25%

7.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of line of credit facility fronting fee

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitment fee on unused capacity

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.38%

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument Annual Administrative Fee

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate stated percentage

'

'

'

'

'

'

'

'

'

'

'

9.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Senior Long-term Debt

294,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, interest rate during period

'

'

'

'

'

'

'

'

'

'

11.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of debt issuance costs

'

'

'

'

'

'

'

'

22,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Write-off capitalized loan fees

'

'

'

'

'

'

'

'

17,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fees to lenders and advisors

17,149,000

[1]

4,945,000

[1]

'

'

'

'

'

'

'

27,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6,200,000

'

'

'

'

'

'

'

'

'

'

'

'

6,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Base floating rate for cash borrowings

'

'

'

'

'

'

'

'

5.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss on terminations of interest rate swaps

1,593,000

-149,000

-2,153,000

'

'

'

'

'

'

'

'

'

'

'

-400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Swaps reclass from accumulated other comprehensive income to earnings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense recorded

'

'

'

'

'

'

'

'

39,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,200,000

1,900,000

100,000

'

'

'

'

'

'

12,700,000

'

'

'

'

'

'

1,400,000

1,000,000

'

'

'

'

7,700,000

6,900,000

2,800,000

'

'

'

'

'

'

200,000

400,000

400,000

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Covenant Terms

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5.00

'

'

'

'

'

'

'

'

'2.50

'

'

'

'5.50

'5.50

'3.50

'2.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Effective interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.92%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Interest Rate During Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.75%

'

'

3.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basis point adjustment to discount rate

50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption premium on senior notes in the event of a change in control

101.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, Fair Value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$317,000,000

[1]

* See Note 16 for discussion of debt issuance costs.

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'	'
Beginning Balance	$40,105	$35,886	$32,884
Accretion	4,752	4,554	4,114
Payments made	-808	-1,169	-341
Currency translation adjustments	-2,864	834	-771
Ending Balance	$41,185	$40,105	$35,886

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 1) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]	'
Operating Leases, December 31, 2013	$8,618
Operating Leases, December 31, 2014	8,890
Operating Leases, December 31, 2015	8,752
Operating Leases, December 31, 2016	6,737
Operating Leases, December 31, 2017	2,785
Operating Leases, Thereafter	6,213
Operating Leases, Total future minimum lease payments	$41,995

Commitments_and_Contingencies_3

Commitments and Contingencies (Details 2) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	bbl
Fixed Price Sales [Member]	'
Summary Of Purchase And Sale Commitments	'
Sale commitments, Volume (barrels)	397,000
Sale commitments, Value	$38,311
Floating Price Sales [Member]	'
Summary Of Purchase And Sale Commitments	'
Sale commitments, Volume (barrels)	15,785,000
Sale commitments, Value	1,458,312
Fixed Price Purchases [Member]	'
Summary Of Purchase And Sale Commitments	'
Purchase commitments, Volume (barrels)	337,000
Purchase commitments, Value	30,767
Floating Price Purchases [Member]	'
Summary Of Purchase And Sale Commitments	'
Purchase commitments, Volume (barrels)	14,610,000
Purchase commitments, Value	$1,432,982

Commitments_and_Contingencies_4

Commitments and Contingencies (Details 3) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Aug. 18, 2011

Dec. 31, 2013

Dec. 31, 2013

Jun. 11, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 23, 2013

Dec. 31, 2013

Dec. 31, 2013

sites

bbl

Minimum [Member]

Maximum [Member]

Blueknight Energy Partners, L.P. [Member]

Crude [Member]

SemGas [Member]

SemCAMS [Member]

SemCAMS [Member]

Commitments [Member]

Capacity [Member]

bbl

sites

sites

SemGas [Member]

SemGas [Member]

Commitments and Contingencies (Textual) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss contingency claims, number of barrels of crude oil claimed to be owed

'

'

'

141,000

'

'

'

'

'

'

'

'

'

Inventory shortage identified

'

'

'

'

'

'

148,000

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

$400,000

'

'

'

Estimated cost to retire facilities

100,900,000

'

'

'

'

'

'

'

'

'

'

'

'

Asset retirement obligation additional estimated costs attributable to third-party owners'

41,700,000

'

'

'

'

'

'

'

'

'

'

'

'

Operating leases, rent expense

11,400,000

8,400,000

9,400,000

'

'

'

'

'

'

'

'

'

'

Notice required to cancel purchase agreements, days

'

'

'

'

'30 days

'120 days

'

'

'

'

'

'

'

Agreed upon fine

'

'

'

'

'

'

'

'

'

'

350,000

'

'

Accrued liabilities

83,429,000

63,831,000

'

'

'

'

'

'

'

'

'

25,800

'

Unrecorded Unconditional Purchase Obligation

'

'

'

'

'

'

'

'

'

'

'

'

$87,300,000

Equity_Details

Equity (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Schedule of Common Stock	'		'
Total shares	42,532,891		'
Par value per share	$0.01		'
Common stock on balance sheet	$425		$420
Shares paid for tax withholding	8,591		'
Shares issued on Emergence Date [Member]	'		'
Schedule of Common Stock	'		'
Total shares	40,882,496		'
Shares subsequently issued in settlement of pre-petition claims [Member]	'		'
Schedule of Common Stock	'		'
Total shares	228,309		'
Remaining shares required to be issued in settlement of pre-petition claims [Member]	'		'
Schedule of Common Stock	'		'
Total shares	289,191		'
Issuance of shares under employee and director compensation programs [Member]	'		'
Schedule of Common Stock	'		'
Total shares	691,570	[1]	'
Awards vested, shares	107,988		'
Shares issued upon exercise of warrants [Member]	'		'
Schedule of Common Stock	'		'
Total shares	441,325	[2]	'
[1]	These shares include 107,988 shares which vested during the year ended December 31, 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 consolidated balance sheet.
[2]	(**) These shares include 425,618 shares issued during the year ended December 31, 2013.

Equity_Details_1

Equity (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Warrants and Rights Note Disclosure [Abstract]	'	'
Total warrants	1,360,823	'
Fair value per warrant	$42.72	'
Warrant liability included current liabilities on consolidated balance sheet	$58,134	$0
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	240,310	'
Remaining warrants to be issued in settlement of pre-petition Claims [Member]	'	'
Warrants and Rights Note Disclosure [Abstract]	'	'
Total warrants	304,427	'
Warrants exercised [Member]	'	'
Warrants and Rights Note Disclosure [Abstract]	'	'
Total warrants	818,124	'

Equity_Equity_Details_2

Equity Equity (Details 2) (USD $)	0 Months Ended	1 Months Ended			12 Months Ended
	Mar. 10, 2014	Nov. 22, 2013	Aug. 19, 2013	30-May-13	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
					Second quarter 2013 dividend [Member]	Third quarter 2013 dividend [Member]	Fourth quarter 2013 dividend [Member]	First quarter 2014 dividend [Member]
Dividends paid	'	$0.21	$0.20	$0.19	'	'	'	'
Dividends, date declared	'	'	'	'	8-May-13	8-Aug-13	11-Nov-13	25-Feb-14
Dividends, date of record	'	'	'	'	20-May-13	19-Aug-13	22-Nov-13	10-Mar-14
Dividends declared	$0.22	'	'	'	'	'	'	'

Equity_Details_Textual

Equity (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013
Equity [Line Items]	'
Common stock shares issued	42,532,891
Number of shares to be issued in settlement of pre-petition claims	517,500
Additional warrants issued in settlement of pre-petition claims	544,737
Par value per share	$0.01
Warrants issued	1,360,823
Price of purchase of one share of common stock against warrant	25
Closing price of common stock price per share	$0.01
Warrants issued on emergence date [Member]	'
Equity [Line Items]	'
Warrants issued	1,634,210
Warrants subsequently issued in settlement of pre-petition claims [Member]	'
Equity [Line Items]	'
Warrants issued	240,310
Class A [Member]	'
Equity [Line Items]	'
Common stock shares authorized	90,000,000
Class B [Member]	'
Equity [Line Items]	'
Common stock shares authorized	10,000,000
Par value per share	$0.01
Closing price of common stock price per share	$0.01
Common Stock, Shares, Outstanding	28,235
Shares issued upon exercise of warrants [Member]	'
Equity [Line Items]	'
Stock issued from warrant exercises, shares	425,618
Common stock shares issued	441,325	[1]
Shares issued on Emergence Date [Member]	'
Equity [Line Items]	'
Common stock shares issued	40,882,496
Shares subsequently issued in settlement of pre-petition claims [Member]	'
Equity [Line Items]	'
Common stock shares issued	228,309
[1]	(**) These shares include 425,618 shares issued during the year ended December 31, 2013.

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income (Loss) from Continuing Operations Attributable to Parent	'	'	'	'	'	'	'	'	$65,753	$28,958	$12,360
Basic earnings per share	'	'	'	'	'	'	'	'	'	'	'
Net income (loss)	6,599	3,135	7,512	48,566	22,976	-432	7,243	2,110	65,812	31,897	2,812
Income (loss) from discontinued operations, net of income taxes	-6	-2	35	32	3,392	-264	-441	252	59	2,939	-9,548
less: Income attributable to noncontrolling interest	3,319	5,054	3,943	5,143	1,882	2,336	2,096	3,483	17,710	9,797	435
Numerator	3,280	-1,919	3,569	43,423	21,094	-2,768	5,147	-1,373	48,102	22,100	2,377
Common stock issued and to be issued pursuant to Plan of Reorganization	'	'	'	'	'	'	'	'	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans	'	'	'	'	'	'	'	'	939	539	240
Denominator, net, basic	'	'	'	'	'	'	'	'	42,339	41,939	41,640
Basic earnings (loss) per share, net	$0.08	($0.05)	$0.08	$1.03	$0.50	($0.07)	$0.12	($0.03)	$1.14	$0.53	$0.06
Continuing Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Income (Loss) from Continuing Operations Attributable to Parent	'	'	'	'	'	'	'	'	65,753	28,958	12,360
Basic earnings per share	'	'	'	'	'	'	'	'	'	'	'
less: Income attributable to noncontrolling interest	'	'	'	'	'	'	'	'	17,710	9,797	435
Numerator	'	'	'	'	'	'	'	'	48,043	19,161	11,925
Common stock issued and to be issued pursuant to Plan of Reorganization	'	'	'	'	'	'	'	'	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans	'	'	'	'	'	'	'	'	939	539	240
Denominator, net, basic	'	'	'	'	'	'	'	'	42,339	41,939	41,640
Basic earnings (loss) per share from continuing operations	'	'	'	'	'	'	'	'	$1.13	$0.46	$0.29
Discontinued Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Basic earnings per share	'	'	'	'	'	'	'	'	'	'	'
Income (loss) from discontinued operations, net of income taxes	'	'	'	'	'	'	'	'	59	2,939	-9,548
less: Income attributable to noncontrolling interest	'	'	'	'	'	'	'	'	0	0	0
Numerator	'	'	'	'	'	'	'	'	$59	$2,939	($9,548)
Common stock issued and to be issued pursuant to Plan of Reorganization	'	'	'	'	'	'	'	'	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans	'	'	'	'	'	'	'	'	939	539	240
Denominator, net, basic	'	'	'	'	'	'	'	'	42,339	41,939	41,640
Basic earnings (loss) per share from discontinued operations	'	'	'	'	'	'	'	'	$0	$0.07	($0.23)

Earnings_Per_Share_Details_1

Earnings Per Share (Details 1) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Net income (loss)	$6,599	$3,135	$7,512	$48,566	$22,976	($432)	$7,243	$2,110	$65,812	$31,897	$2,812
Less: net income attributable to noncontrolling interests	3,319	5,054	3,943	5,143	1,882	2,336	2,096	3,483	17,710	9,797	435
less: Income resulting from change in fair value of warrants	'	'	'	'	'	'	'	'	'	'	5,012
Numerator	3,280	-1,919	3,569	43,423	21,094	-2,768	5,147	-1,373	48,102	22,100	2,377
Common stock issued and to be issued pursuant to Plan of Reorganization	'	'	'	'	'	'	'	'	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans	'	'	'	'	'	'	'	'	939	539	240
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares	'	'	'	'	'	'	'	'	307	315	'
Denominator, net, diluted	'	'	'	'	'	'	'	'	42,646	42,254	41,640
Diluted earnings (loss) per share, Net	$0.08	($0.05)	$0.08	$1.03	$0.50	($0.07)	$0.12	($0.03)	$1.13	$0.52	($0.06)
Continuing Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Less: net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	17,710	9,797	435
less: Income resulting from change in fair value of warrants	'	'	'	'	'	'	'	'	'	'	5,012
Numerator	'	'	'	'	'	'	'	'	48,043	19,161	11,925
Common stock issued and to be issued pursuant to Plan of Reorganization	'	'	'	'	'	'	'	'	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans	'	'	'	'	'	'	'	'	939	539	240
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares	'	'	'	'	'	'	'	'	307	315	'
Denominator, net, diluted	'	'	'	'	'	'	'	'	42,646	42,254	41,640
Diluted earnings (loss) per share from continuing operations	'	'	'	'	'	'	'	'	$1.13	$0.45	$0.17
Discontinued Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Less: net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	0	0	0
less: Income resulting from change in fair value of warrants	'	'	'	'	'	'	'	'	'	'	0
Numerator	'	'	'	'	'	'	'	'	59	2,939	-9,548
Common stock issued and to be issued pursuant to Plan of Reorganization	'	'	'	'	'	'	'	'	41,400	41,400	41,400
Weighted average common stock outstanding issued under compensation plans	'	'	'	'	'	'	'	'	939	539	240
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares	'	'	'	'	'	'	'	'	307	315	'
Denominator, net, diluted	'	'	'	'	'	'	'	'	42,646	42,254	41,640
Diluted earnings (loss) per share from discontinued operations	'	'	'	'	'	'	'	'	$0	$0.07	($0.23)
After reduction for gain on warrants [Member]	'	'	'	'	'	'	'	'	'	'	'
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Numerator	'	'	'	'	'	'	'	'	'	'	-2,635
After reduction for gain on warrants [Member] | Continuing Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Numerator	'	'	'	'	'	'	'	'	'	'	6,913
After reduction for gain on warrants [Member] | Discontinued Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Numerator	'	'	'	'	'	'	'	'	'	'	($9,548)

Earnings_Per_Share_Details_Tex

Earnings Per Share (Details Textual) (USD $)	12 Months Ended						0 Months Ended	1 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 02, 2014	Jan. 31, 2013	Dec. 31, 2011
				Stock Compensation Plan [Member]	Stock Compensation Plan [Member]	Stock Compensation Plan [Member]	Stock Compensation Plan [Member]	Stock Compensation Plan [Member]	Continuing Operations [Member]
							Subsequent Event [Member]	Subsequent Event [Member]
Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'
(Gain) loss on fair value of warrants	$46,433	$21,310	($5,012)	'	'	'	'	'	$5,012
Awards vested, shares	'	'	'	107,988	162,986	201,361	75,942	75,942	'

EquityBased_Compensation_Detai

Equity-Based Compensation (Details) (Stock Compensation Plan [Member], USD $)	12 Months Ended						0 Months Ended	1 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Jan. 02, 2014	Jan. 31, 2013
							Subsequent Event [Member]	Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award	'		'		'		'	'
Outstanding, shares	450,552		410,506		502,902		'	'
Awards granted, shares	201,451	[1]	246,432	[1]	173,982	[1]	'	'
Awards vested, shares	-107,988		-162,986		-201,361		-75,942	-75,942
Awards forfeited, shares	-13,412		-43,400		-65,017		'	'
Outstanding, shares	530,603		450,552		410,506		'	'
Awards outstanding, average grant date fair value	$26.87	[2]	$26.59	[2]	$25	[2]	'	'
Awards granted, average grant date fair value per share	$52.78	[1],[2]	$27.81	[1],[2]	$28.90	[1],[2]	'	'
Awards vested, average grant date fair value per share	$25.71	[2]	$25.20	[2]	$25	[2]	'	'
Awards forfeited, average grant date fair value per share	$32.36	[2]	$27.74	[2]	$25.36	[2]	'	'
Awards outstanding, average grant date fair value	$36.80	[2]	$26.87	[2]	$26.59	[2]	'	'
[1]	For certain of the awards granted in 2013, 2012 and 2011, the number of shares that will vest is contingent upon our achievement of certain specified targets. Awards with performance conditions are valued based on the grant date closing price on the New York Stock Exchange assuming that 100% of the awards will vest. Awards with market conditions are valued using Monte Carlo simulations. Market awards issued in 2013 were valued using blended volatility of 28.9%, comprised of 50% historical volatility and 50% implied volatility and a risk-free rate based on the three-year United States Treasury spot rate on the grant date. If we meet the specified maximum targets, approximately 74 thousand, 41 thousand and 26 thousand additional shares could vest related to the 2013, 2012 and 2011 awards, respectively.
[2]	The grant date fair value of awards issued prior to our listing on the New York Stock Exchange was estimated at $25 per share, which was the per share reorganization value of the Company. Subsequent to our listing, the grant date fair value is determined based on the closing price on the New York Stock Exchange on the date of issue.

EquityBased_Compensation_Equit

Equity-Based Compensation Equity-Based Compensation (Details 1)	Dec. 31, 2013
Awards to Vest in Next Twelve Months [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding shares	165,980
Awards to Vest in Year Two [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding shares	244,912
Awards to Vest in Year Three [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding shares	260,898

EquityBased_Compensation_Equit1

Equity-Based Compensation Equity-Based Compensation (Details 2) (Rose Rock Midstream L P [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Rose Rock Midstream L P [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Outstanding, shares	43,960	0
Awards granted, shares	49,104	46,069
Awards vested, shares	-9,333	0
Awards forfeited, shares	-783	-2,109
Outstanding, shares	82,948	43,960
Awards outstanding, average grant date fair value	$21.91	$0
Awards granted, average grant date fair value per share	$34.41	$21.97
Awards vested, average grant date fair value per share	$27.25	$0
Awards forfeited, average grant date fair value per share	$34.40	$20.60
Awards outstanding, average grant date fair value	$28.59	$21.91

EquityBased_Compensation_Equit2

Equity-Based Compensation Equity-Based Compensation (Details 3) (Rose Rock equity incentive plan [Member])	Dec. 31, 2013
Awards to Vest in Next Twelve Months [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, shares	5,712
Awards to Vest in Year Two [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, shares	34,627
Awards to Vest in Year Three [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Outstanding, shares	42,609

EquityBased_Compensation_Detai1

Equity-Based Compensation (Details Textual) (USD $)

12 Months Ended

0 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jan. 02, 2014

Jan. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Jan. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Retention Awards [Member]

2013 stock compensation awards [Member]

2012 stock compensation awards [Member]

2011 stock compensation awards [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Rose Rock equity incentive plan [Member]

Rose Rock equity incentive plan [Member]

Rose Rock equity incentive plan [Member]

Rose Rock Midstream L P [Member]

Rose Rock Midstream L P [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Distribution equivalent [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock reserved for issuance pursuant to employee and director compensation programs

'

'

'

2,781,635

'

'

'

'

'

'

'

'

'

'

'

'

'

Awards vested, shares

'

'

'

107,988

162,986

201,361

'

'

'

'

75,942

75,942

'

'

406

9,333

0

Value of unvested dividend rights to be settled in Class A shares

$120,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of Class A shares equal to unvested dividend rights

1,839

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based compensation expense recognized

6,500,000

6,200,000

5,400,000

'

'

'

2,400,000

'

'

'

'

'

800,000

300,000

'

'

'

Unrecognized compensation expense for nonvested awards

10,300,000

'

'

'

'

'

'

'

'

'

'

'

1,500,000

'

'

'

'

Weighted average vesting period

'17 months

'

'

'

'

'

'

'

'

'

'

'

'19 months

'

'

'

'

General partner ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

Unvested Unit Distributions Value

'

'

'

'

'

'

'

'

'

'

'

'

101,000

'

'

'

'

Number Of Common Units Equivalent To Unvested Unit Distributions

'

'

'

'

'

'

'

'

'

'

'

'

2,617

'

'

'

'

Cash used to settle awards

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

'

'

'

Liability of awards settled

'

'

'

'

'

'

$3,200,000

'

'

'

'

'

'

'

'

'

'

Common stock, shares issued to settle awards

'

'

'

'

'

'

125,212

'

'

'

'

'

'

'

'

'

'

Share price

$65.23

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$38.70

'

Estimated grant date fair value prior to listing

'

'

'

$25

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based compensation awards which could vest if certain targets are met

'

'

'

'

'

'

'

74,000

41,000

26,000

'

'

'

'

'

'

'

Percentage of awards assumed will ultimately vest at grant date

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based award volatility assumption

28.90%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of volatility assumption based on historical volatility

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of volatility assumption based on implied volatility

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in projected benefit obligation:	'	'	'
Projected benefit obligation at beginning of year	$28,357	$26,767	'
Service cost	577	596	742
Interest cost	1,047	1,134	1,494
Actuarial (gains) losses	-3,022	1,436	'
Benefits paid	-968	-2,193	'
Currency translation adjustment	-1,955	617	'
Projected benefit obligation at end of year	24,036	28,357	26,767
Change in fair value of plan assets:	'	'	'
Fair value of plan assets at beginning of year	22,727	21,008	'
Employer contributions	1,144	1,297	'
Actual return on plan assets	4,397	2,123	'
Benefits paid	-968	-2,193	'
Currency translation adjustment	-1,718	492	'
Fair value of plan assets at end of year	25,582	22,727	21,008
Funded status:	1,546	-5,630	'
Accumulated benefit obligation at end of year	$22,687	$26,725	'

Employee_Benefit_Plans_Employe

Employee Benefit Plans Employee Benefit Plans (Details 1)	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'
Benefit obligation discount rate	4.70%	3.90%
Benefit obligation rate of compensation increase	3.50%	3.50%

Employee_Benefit_Plans_Details1

Employee Benefit Plans (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]	'	'	'
Service cost	$577	$596	$742
Interest cost	1,047	1,134	1,494
Expected return on plan assets	-1,298	-1,263	-1,585
Settlement loss	0	-55	703
Other	186	118	0
Net periodic benefit cost	$512	$530	$1,354

Employee_Benefit_Plans_Employe1

Employee Benefit Plans Employee Benefit Plans (Details 3)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Net periodic benefit cost discount rate	3.90%	4.25%	5.25%
Net periodic benefit costs long-term rate of return on assets	6.00%	6.00%	6.75%
Net periodic benefit cost rate of compensation increase	3.50%	3.50%	3.50%

Employee_Benefit_Plans_Details2

Employee Benefit Plans (Details 4) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Compensation and Retirement Disclosure [Abstract]	'
Next twelve months	$1,636
Year two	1,826
Year three	1,999
Year four	2,039
Year five	1,808
Years six through ten	$8,732

Employee_Benefit_Plans_Details3

Employee Benefit Plans (Details 5) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair value of plan assets	$25,582	$22,727	$21,008
Cash and cash equivalents [Member]	'	'	'
Fair value of plan assets	171	0	'
Actual Allocation	0.70%	'	'
Normal Allocation Per Investment Policy	0.00%	'	'
Minimum Allocation Per Investment Policy	0.00%	'	'
Maximum Allocation Per Investment Policy	10.00%	'	'
Pooled Funds-fixed income [Member]	'	'	'
Fair value of plan assets	8,381	8,018	'
Actual Allocation	32.80%	'	'
Normal Allocation Per Investment Policy	40.00%	'	'
Minimum Allocation Per Investment Policy	32.50%	'	'
Maximum Allocation Per Investment Policy	47.50%	'	'
Pooled Funds-Canadian Equities [Member]	'	'	'
Fair value of plan assets	8,324	7,391	'
Actual Allocation	32.50%	'	'
Normal Allocation Per Investment Policy	30.00%	'	'
Minimum Allocation Per Investment Policy	22.50%	'	'
Maximum Allocation Per Investment Policy	37.50%	'	'
Pooled Funds-non-Canadian Equities [Member]	'	'	'
Fair value of plan assets	$8,706	$7,318	'
Actual Allocation	34.00%	'	'
Normal Allocation Per Investment Policy	30.00%	'	'
Minimum Allocation Per Investment Policy	22.50%	'	'
Maximum Allocation Per Investment Policy	37.50%	'	'

Employee_Benefit_Plans_Details4

Employee Benefit Plans (Details 6) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	$0		$0
Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	36		22
Recurring [Member] | Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	171		0
Recurring [Member] | Level 1 [Member] | Cash and cash equivalents [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	171		0
Recurring [Member] | Level 1 [Member] | Fixed income mutual funds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	0		0	[1]
Recurring [Member] | Level 1 [Member] | Equity mutual funds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	0		0	[1]
Recurring [Member] | Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	25,411		22,727
Recurring [Member] | Level 2 [Member] | Cash and cash equivalents [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	0		0
Recurring [Member] | Level 2 [Member] | Fixed income mutual funds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	8,381	[1]	8,018	[1]
Recurring [Member] | Level 2 [Member] | Equity mutual funds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	17,030	[1]	14,709	[1]
Recurring [Member] | Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	0		0
Recurring [Member] | Level 3 [Member] | Cash and cash equivalents [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	0		0
Recurring [Member] | Level 3 [Member] | Fixed income mutual funds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	0		0
Recurring [Member] | Level 3 [Member] | Equity mutual funds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total assets	$0		$0
[1]	(a) Mutual funds are valued daily in actively traded markets by an independent custodian for the investment manager. For purposes of calculating the value, portfolio securities and other assets for which market quotes are readily available are valued at market value. Market value is generally determined on a basis of last reported sales prices, or if no sales are reported, based on quotes obtained from a quotation reporting system, established market makers, or pricing services. Investments initially valued in currencies other than the U.S. dollar are converted to the U.S. dollar using exchange rates obtained from pricing services.

Employee_Benefit_Plans_Details5

Employee Benefit Plans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Postretirement Benefits [Line Items]	'	'	'
Contributions to the defined contribution plans	$1,100,000	$900,000	$1,100,000
Funded status of the Pension Plans	1,546,000	-5,630,000	'
Funded status of the pension plans to other comprehensive income (loss), net of income taxes	-4,800,000	400,000	1,700,000
Estimated contributions to pension plans	1,000,000	'	'
Projected benefit obligation	24,036,000	28,357,000	26,767,000
Severance Costs	'	'	400,000
Retiree Medical Plan [Member]	'	'	'
Postretirement Benefits [Line Items]	'	'	'
Projected benefit obligation	1,600,000	1,800,000	'
Other Noncurrent Assets [Member]	'	'	'
Postretirement Benefits [Line Items]	'	'	'
Funded status of the Pension Plans	1,546,000	'	'
Other Noncurrent Liabilities [Member]	'	'	'
Postretirement Benefits [Line Items]	'	'	'
Funded status of the Pension Plans	'	($5,630,000)	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Beginning Balance	($1,299)	($13,875)	$1,115
Currency translation adjustments	-6,363	12,635	-13,075
Changes related to benefit plans, net of income tax expense	4,808	-343	-1,631
Changes related to interest rate swaps net income tax benefits	'	284	-284
Ending Balance	-2,854	-1,299	-13,875
Changes related to interest rate swaps, income tax benefits	'	'	-74
Changes related to benefit plans, income tax expense (benefit)	1,603	-117	-553
Changes related foreign currency translation, net of tax expense (benefit)	-3,999	1,168	0
Currency Translation [Member]	'	'	'
Beginning Balance	1,855	-10,780	2,295
Currency translation adjustments	-6,363	12,635	-13,075
Changes related to benefit plans, net of income tax expense	0	0	0
Changes related to interest rate swaps net income tax benefits	'	0	0
Ending Balance	-4,508	1,855	-10,780
Employee Benefit Plans [Member]	'	'	'
Beginning Balance	-3,154	-2,811	-1,180
Currency translation adjustments	0	0	0
Changes related to benefit plans, net of income tax expense	4,808	-343	-1,631
Changes related to interest rate swaps net income tax benefits	'	0	0
Ending Balance	1,654	-3,154	-2,811
Interest Rate Swaps [Member]	'	'	'
Beginning Balance	0	-284	0
Currency translation adjustments	0	0	0
Changes related to benefit plans, net of income tax expense	0	0	0
Changes related to interest rate swaps net income tax benefits	'	284	-284
Ending Balance	$0	$0	($284)

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of operating assets and liabilities	'	'	'
Decrease (increase) in restricted cash	$29,467	$4,907	$25,827
Decrease (increase) in accounts receivable	11,172	-129,102	28,568
Decrease (increase) in receivable from affiliates	-61,095	230	-6,071
Decrease (increase) in inventories	-11,352	-936	-8,908
Decrease (increase) in derivatives and margin deposits	1,012	-1,245	14,287
Decrease (increase) in other current assets	9,361	4,197	-7,214
Increase (decrease) in other noncurrent assets	-137	-2,467	1,874
Increase (decrease) in accounts payable and accrued liabilities	31,030	114,776	-9,446
Increase (decrease) in payable to affiliates	62,279	-6,871	6,614
Increase (decrease) in payables to pre-petition creditors	-29,609	-5,206	-34,490
Increase (decrease) in other noncurrent liabilities	-2,541	2,500	4,115
Total changes in operating assets and liabilities	$39,861	($14,283)	$11,408

Supplemental_Cash_Flow_Informa3

Supplemental Cash Flow Information (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Significant Noncash Transactions [Line Items]	'	'	'
Sale of interest in equity investment to related party	$67,291,000	'	'
Tax effect of adjustment to APIC from sale of equity investment to less than wholly owned subsidiary	67,300,000	'	'
Proceeds from warrant exercises	225,000	0	0
Cash paid for interest	23,900,000	8,000,000	32,600,000
Income taxes (net of refunds received)	13,900,000	11,400,000	10,100,000
Purchases Of Property, Plant And Equipment, Accrued	10,100,000	1,600,000	4,000,000
Noncontrolling Interest [Member]	'	'	'
Other Significant Noncash Transactions [Line Items]	'	'	'
Sale of interest in equity investment to related party	180,220,000	'	'
Additional Paid-in Capital [Member]	'	'	'
Other Significant Noncash Transactions [Line Items]	'	'	'
Sale of interest in equity investment to related party	-112,929,000	'	'
Warrant [Member]	'	'	'
Other Significant Noncash Transactions [Line Items]	'	'	'
Increase in additional paid in capital due to warrant exercises	$21,400,000	'	'

Quarterly_Financial_Data_Detai

Quarterly Financial Data (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Data [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	$457,328	$357,748	$324,244	$287,696	$315,837	$277,852	$331,777	$312,031	$1,427,016	$1,237,497	$1,465,246
Loss (gain) on disposal or impairment of long-lived assets, net	-109	408	-376	-162	-35	-3,615	119	0	-239	-3,531	301
Other operating costs and expenses	448,796	344,979	312,103	282,813	306,920	270,958	330,768	311,067	1,388,691	1,219,713	'
Total expenses	448,687	345,387	311,727	282,651	306,885	267,343	330,887	311,067	1,388,452	1,216,182	1,425,051
Earnings from equity method investments	12,788	7,483	14,861	17,345	13,133	3,116	12,289	7,498	52,477	36,036	15,004
Gain on issuance of common units by equity method investee	26,873	0	0	0	'	'	'	'	26,873	0	0
Operating income	48,302	19,844	27,378	22,390	22,085	13,625	13,179	8,462	117,914	57,351	55,199
Other expenses, net	17,646	13,294	10,613	27,862	5,567	11,701	5,587	7,616	69,415	30,471	45,149
Income (loss) from continuing operations before income taxes	30,656	6,550	16,765	-5,472	16,518	1,924	7,592	846	48,499	26,880	10,050
Income tax expense (benefit)	24,051	3,413	9,288	-54,006	-3,066	2,092	-92	-1,012	-17,254	-2,078	-2,310
Income (loss) from continuing operations	6,605	3,137	7,477	48,534	19,584	-168	7,684	1,858	65,753	28,958	'
Income (loss) from discontinued operations, net of income taxes	-6	-2	35	32	3,392	-264	-441	252	59	2,939	-9,548
Net income (loss)	6,599	3,135	7,512	48,566	22,976	-432	7,243	2,110	65,812	31,897	2,812
Less: net income attributable to noncontrolling interests	3,319	5,054	3,943	5,143	1,882	2,336	2,096	3,483	17,710	9,797	435
Net income (loss) attributable to SemGroup	$3,280	($1,919)	$3,569	$43,423	$21,094	($2,768)	$5,147	($1,373)	$48,102	$22,100	$2,377
Basic earnings (loss) per share, net	$0.08	($0.05)	$0.08	$1.03	$0.50	($0.07)	$0.12	($0.03)	$1.14	$0.53	$0.06
Diluted earnings (loss) per share, Net	$0.08	($0.05)	$0.08	$1.03	$0.50	($0.07)	$0.12	($0.03)	$1.13	$0.52	($0.06)

Related_Party_Transactions_Det

Related Party Transactions (Details) (NGL Energy [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
NGL Energy [Member]	'	'	'
Related Party Transaction	'	'	'
Revenues from related party	$103,203	$58,643	$9,708
Purchases from related party	15,255	42,741	11,270
Reimbursements from NGL Energy for transition services	$198	$575	$346

Related_Party_Transactions_Det1

Related Party Transactions (Details Textual) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

31-May-12

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Gavilon, L.L.C. [Member]

High Sierra Crude Oil and Marketing, LLC [Member]

High Sierra Crude Oil and Marketing, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Law Firm [Member]

Law Firm [Member]

Law Firm [Member]

Glass Mountain Holding LLC [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Pipeline Llc [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

White Cliffs Pipeline, LLC [Member]

Glass Mountain Pipeline Llc [Member]

Crude [Member]

Crude [Member]

Glass Mountain Pipeline Llc [Member]

Glass Mountain Holding LLC [Member]

Glass Mountain Holding LLC [Member]

Law Firm [Member]

Law Firm [Member]

Law Firm [Member]

Ngl Energy Partners Lp [Member]

mi

Glass Mountain Pipeline Llc [Member]

mi

Related Party Transactions (Textual) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues from related party

$560,400,000

$132,800,000

$42,600,000

$2,900,000

$2,500,000

$2,200,000

'

'

'

'

'

'

'

'

'

'

'

'

Purchases from related party

552,100,000

102,200,000

44,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Length of pipeline network (in miles)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

624

210

Due from related party

'

'

'

'

'

'

'

'

'

900,000

'

'

'

'

'

'

'

'

Repayments on related party debt

'

'

'

'

'

'

'

'

'

'

500,000

400,000

'

'

'

'

'

'

Equity method investment, ownership percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

50.00%

Legal fees

'

'

'

'

'

'

$1,900,000

$1,700,000

$1,800,000

'

'

'

$200,000

$100,000

$200,000

'

'

'

Condensed_Consolidating_Guaran2

Condensed Consolidating Guarantor Financial Statements (Details) (USD $)

1 Months Ended

3 Months Ended

12 Months Ended

Aug. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Cash and cash equivalents

'

$79,351,000

'

'

'

$80,029,000

'

'

'

$79,351,000

$80,029,000

$73,613,000

$87,821,000

Restricted cash

'

5,119,000

'

'

'

34,678,000

'

'

'

5,119,000

34,678,000

'

'

Accounts Receivable, net

'

323,965,000

'

'

'

346,169,000

'

'

'

323,965,000

346,169,000

'

'

Receivable from affiliates

'

67,273,000

'

'

'

6,178,000

'

'

'

67,273,000

6,178,000

'

'

Inventories

'

44,295,000

'

'

'

34,433,000

'

'

'

44,295,000

34,433,000

'

'

Other current assets

'

14,011,000

'

'

'

18,516,000

'

'

'

14,011,000

18,516,000

'

'

Total current assets

'

534,014,000

'

'

'

520,003,000

'

'

'

534,014,000

520,003,000

'

'

Property, plant and equipment

'

1,105,728,000

'

'

'

814,724,000

'

'

'

1,105,728,000

814,724,000

'

'

Equity method investments

'

565,124,000

'

'

'

387,802,000

'

'

'

565,124,000

387,802,000

'

'

Goodwill

'

62,021,000

'

'

'

9,884,000

'

'

'

62,021,000

9,884,000

9,453,000

107,823,000

Other intangible assets

'

174,838,000

'

'

'

7,585,000

'

'

'

174,838,000

7,585,000

'

'

Other noncurrent assets

'

28,889,000

'

'

'

8,181,000

'

'

'

28,889,000

8,181,000

'

'

Total assets

'

2,470,614,000

'

'

'

1,748,179,000

'

'

'

2,470,614,000

1,748,179,000

'

'

Accounts payable

'

254,467,000

'

'

'

253,623,000

'

'

'

254,467,000

253,623,000

'

'

Accrued liabilities

'

83,429,000

'

'

'

63,831,000

'

'

'

83,429,000

63,831,000

'

'

Payables to pre-petition creditors

'

3,177,000

'

'

'

32,933,000

'

'

'

3,177,000

32,933,000

'

'

Deferred revenue

'

25,538,000

'

'

'

18,973,000

'

'

'

25,538,000

18,973,000

'

'

Other Liabilities, Current

'

12,153,000

'

'

'

4,960,000

'

'

'

12,153,000

4,960,000

'

'

Other current liabilities

'

70,287,000

'

'

'

'

'

'

'

70,287,000

'

'

'

Current portion of long-term debt

'

37,000

'

'

'

24,000

'

'

'

37,000

24,000

'

'

Total current liabilities

'

499,214,000

'

'

'

374,344,000

'

'

'

499,214,000

374,344,000

'

'

Long-term debt

'

615,088,000

'

'

'

206,062,000

'

'

'

615,088,000

206,062,000

'

'

Deferred income taxes

'

100,945,000

'

'

'

65,620,000

'

'

'

100,945,000

65,620,000

'

'

Other noncurrent liabilities

'

41,504,000

'

'

'

80,625,000

'

'

'

41,504,000

80,625,000

'

'

Commitments and contingencies

'

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Parent

'

1,053,902,000

'

'

'

892,394,000

'

'

'

1,053,902,000

892,394,000

'

'

Noncontrolling interests in consolidated subsidiaries

'

159,961,000

'

'

'

129,134,000

'

'

'

159,961,000

129,134,000

'

'

Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest

'

1,213,863,000

'

'

'

1,021,528,000

'

'

'

1,213,863,000

1,021,528,000

978,665,000

855,068,000

Liabilities and Equity

'

2,470,614,000

'

'

'

1,748,179,000

'

'

'

2,470,614,000

1,748,179,000

'

'

Sales Revenue, Goods, Gross

'

'

'

'

'

'

'

'

'

1,145,104,000

953,738,000

1,237,313,000

'

Sales Revenue, Services, Other

'

'

'

'

'

'

'

'

'

140,198,000

117,721,000

123,345,000

'

Other Revenue, Net

'

'

'

'

'

'

'

'

'

141,714,000

166,038,000

104,588,000

'

Revenue

'

457,328,000

357,748,000

324,244,000

287,696,000

315,837,000

277,852,000

331,777,000

312,031,000

1,427,016,000

1,237,497,000

1,465,246,000

'

Costs of products sold

'

'

'

'

'

'

'

'

'

1,020,100,000

874,885,000

1,144,439,000

'

Operating Costs and Expenses

'

'

'

'

'

'

'

'

'

223,585,000

224,700,000

155,041,000

'

General and administrative

'

'

'

'

'

'

'

'

'

78,597,000

71,918,000

75,447,000

'

Depreciation and amortization

'

'

'

'

'

'

'

'

'

66,409,000

48,210,000

49,823,000

'

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

'

-109,000

408,000

-376,000

-162,000

-35,000

-3,615,000

119,000

0

-239,000

-3,531,000

301,000

'

Costs and Expenses

'

448,687,000

345,387,000

311,727,000

282,651,000

306,885,000

267,343,000

330,887,000

311,067,000

1,388,452,000

1,216,182,000

1,425,051,000

'

Earnings from equity method investments

'

12,788,000

7,483,000

14,861,000

17,345,000

13,133,000

3,116,000

12,289,000

7,498,000

52,477,000

36,036,000

15,004,000

'

Gain on issuance of common units by equity method investee

'

26,873,000

0

0

0

'

'

'

'

26,873,000

0

0

'

Operating income (loss)

'

48,302,000

19,844,000

27,378,000

22,390,000

22,085,000

13,625,000

13,179,000

8,462,000

117,914,000

57,351,000

55,199,000

'

Interest Expense

'

'

'

'

'

'

'

'

'

25,142,000

8,902,000

60,138,000

'

Foreign Currency Transaction Gain (Loss), before Tax

'

'

'

'

'

'

'

'

'

-1,633,000

298,000

-3,450,000

'

Other expense (income), net

'

'

'

'

'

'

'

'

'

45,906,000

21,271,000

-11,539,000

'

Other expenses, net

'

17,646,000

13,294,000

10,613,000

27,862,000

5,567,000

11,701,000

5,587,000

7,616,000

69,415,000

30,471,000

45,149,000

'

Income (loss) from continuing operations before income taxes

'

30,656,000

6,550,000

16,765,000

-5,472,000

16,518,000

1,924,000

7,592,000

846,000

48,499,000

26,880,000

10,050,000

'

Income tax expense (benefit)

'

24,051,000

3,413,000

9,288,000

-54,006,000

-3,066,000

2,092,000

-92,000

-1,012,000

-17,254,000

-2,078,000

-2,310,000

'

Income (Loss) from Continuing Operations Attributable to Parent

'

'

'

'

'

'

'

'

'

65,753,000

28,958,000

12,360,000

'

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

-6,000

-2,000

35,000

32,000

3,392,000

-264,000

-441,000

252,000

59,000

2,939,000

-9,548,000

'

Net income (loss)

'

6,599,000

3,135,000

7,512,000

48,566,000

22,976,000

-432,000

7,243,000

2,110,000

65,812,000

31,897,000

2,812,000

'

Less: net income attributable to noncontrolling interests

'

3,319,000

5,054,000

3,943,000

5,143,000

1,882,000

2,336,000

2,096,000

3,483,000

17,710,000

9,797,000

435,000

'

Net income (loss) attributable to SemGroup

'

3,280,000

-1,919,000

3,569,000

43,423,000

21,094,000

-2,768,000

5,147,000

-1,373,000

48,102,000

22,100,000

2,377,000

'

Other Comprehensive Income (Loss), Net of Tax

'

'

'

'

'

'

'

'

'

-1,555,000

12,576,000

-14,990,000

'

Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

64,257,000

44,473,000

-12,178,000

'

Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

17,710,000

9,797,000

435,000

'

Comprehensive Income (Loss), Net of Tax, Attributable to Parent

'

'

'

'

'

'

'

'

'

46,547,000

34,676,000

-12,613,000

'

Net Cash Provided by (Used in) Operating Activities

'

'

'

'

'

'

'

'

'

173,409,000

79,642,000

74,041,000

'

Capital expenditures

'

'

'

'

'

'

'

'

'

-215,609,000

-119,319,000

-65,995,000

'

Proceeds from sale of long-lived assets

'

'

'

'

'

'

'

'

'

1,279,000

2,641,000

1,125,000

'

Investments in non-consolidated subsidiaries

'

'

'

'

'

'

'

'

'

-173,868,000

-78,253,000

-3,717,000

'

Payments to acquire businesses

'

'

'

'

'

'

'

'

'

-362,456,000

0

0

'

Proceeds from sale of non-consolidated affiliate

'

'

'

'

'

'

'

'

'

0

3,500,000

0

'

Proceeds from the sale of SemStream assets

'

'

'

'

'

'

'

'

'

0

12,250,000

93,054,000

'

Proceeds from Sale of Equity Method Investments

'

'

'

'

'

'

'

'

'

0

'

0

'

Distributions in excess of equity in earnings of affiliates

'

'

'

'

'

'

'

'

'

12,246,000

17,290,000

12,455,000

'

Net Cash Provided by (Used in) Investing Activities

'

'

'

'

'

'

'

'

'

-738,408,000

-161,891,000

36,922,000

'

Payments of Debt Issuance Costs

'

'

'

'

'

'

'

'

'

-14,936,000

-707,000

-12,533,000

'

Proceeds from Issuance of Long-term Debt and Capital Securities, Net

'

'

'

'

'

'

'

'

'

1,268,474,000

318,000,000

263,905,000

'

Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities

'

'

'

'

'

'

'

'

'

-859,412,000

-222,066,000

-503,189,000

'

Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs

152,500,000

'

'

'

'

'

'

'

'

210,226,000

0

127,134,000

'

Distributions to noncontrolling interests

'

'

'

'

'

'

'

'

'

-17,647,000

-8,502,000

0

'

Proceeds from warrant exercises

'

'

'

'

'

'

'

'

'

225,000

0

0

'

Repurchase of common stock

'

'

'

'

'

'

'

'

'

-371,000

-242,000

0

'

Dividends paid

'

'

'

'

'

'

'

'

'

-25,429,000

0

0

'

Intercompany payments and receipts

'

'

'

'

'

'

'

'

'

0

0

0

'

Net Cash Provided by (Used in) Financing Activities

'

'

'

'

'

'

'

'

'

561,130,000

86,483,000

-124,683,000

'

Effect of exchange rate changes on cash and cash equivalents

'

'

'

'

'

'

'

'

'

3,191,000

-610,000

-34,000

'

Cash and Cash Equivalents, Period Increase (Decrease)

'

'

'

'

'

'

'

'

'

-678,000

3,624,000

-13,754,000

'

Change in cash and cash equivalents included in discontinued operations

'

'

'

'

'

'

'

'

'

0

2,792,000

-454,000

'

Change in cash and cash equivalents from continuing operations

'

'

'

'

'

'

'

'

'

-678,000

6,416,000

-14,208,000

'

Parent Company [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

'

2,545,000

'

'

'

19,123,000

'

'

'

2,545,000

19,123,000

111,000

7,216,000

Restricted cash

'

3,851,000

'

'

'

33,324,000

'

'

'

3,851,000

33,324,000

'

'

Accounts Receivable, net

'

649,000

'

'

'

1,155,000

'

'

'

649,000

1,155,000

'

'

Receivable from affiliates

'

1,519,000

'

'

'

827,000

'

'

'

1,519,000

827,000

'

'

Inventories

'

0

'

'

'

0

'

'

'

0

0

'

'

Other current assets

'

8,712,000

'

'

'

2,528,000

'

'

'

8,712,000

2,528,000

'

'

Total current assets

'

17,276,000

'

'

'

56,957,000

'

'

'

17,276,000

56,957,000

'

'

Property, plant and equipment

'

4,114,000

'

'

'

5,399,000

'

'

'

4,114,000

5,399,000

'

'

Equity method investments

'

1,511,922,000

'

'

'

1,104,832,000

'

'

'

1,511,922,000

1,104,832,000

'

'

Goodwill

'

0

'

'

'

0

'

'

'

0

0

'

'

Other intangible assets

'

31,000

'

'

'

36,000

'

'

'

31,000

36,000

'

'

Other noncurrent assets

'

15,263,000

'

'

'

3,606,000

'

'

'

15,263,000

3,606,000

'

'

Total assets

'

1,548,606,000

'

'

'

1,170,830,000

'

'

'

1,548,606,000

1,170,830,000

'

'

Accounts payable

'

1,172,000

'

'

'

70,000

'

'

'

1,172,000

70,000

'

'

Accrued liabilities

'

10,072,000

'

'

'

8,972,000

'

'

'

10,072,000

8,972,000

'

'

Payables to pre-petition creditors

'

3,124,000

'

'

'

32,876,000

'

'

'

3,124,000

32,876,000

'

'

Deferred revenue

'

0

'

'

'

0

'

'

'

0

0

'

'

Other Liabilities, Current

'

'

'

'

'

134,000

'

'

'

'

134,000

'

'

Other current liabilities

'

61,875,000

'

'

'

'

'

'

'

61,875,000

'

'

'

Current portion of long-term debt

'

0

'

'

'

0

'

'

'

0

0

'

'

Total current liabilities

'

76,260,000

'

'

'

42,052,000

'

'

'

76,260,000

42,052,000

'

'

Long-term debt

'

370,000,000

'

'

'

201,500,000

'

'

'

370,000,000

201,500,000

'

'

Deferred income taxes

'

48,436,000

'

'

'

2,018,000

'

'

'

48,436,000

2,018,000

'

'

Other noncurrent liabilities

'

8,000

'

'

'

32,866,000

'

'

'

8,000

32,866,000

'

'

Stockholders' Equity Attributable to Parent

'

1,053,902,000

'

'

'

892,394,000

'

'

'

1,053,902,000

892,394,000

'

'

Noncontrolling interests in consolidated subsidiaries

'

0

'

'

'

0

'

'

'

0

0

'

'

Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest

'

1,053,902,000

'

'

'

892,394,000

'

'

'

1,053,902,000

892,394,000

'

'

Liabilities and Equity

'

1,548,606,000

'

'

'

1,170,830,000

'

'

'

1,548,606,000

1,170,830,000

'

'

Sales Revenue, Goods, Gross

'

'

'

'

'

'

'

'

'

0

0

0

'

Sales Revenue, Services, Other

'

'

'

'

'

'

'

'

'

0

0

0

'

Other Revenue, Net

'

'

'

'

'

'

'

'

'

0

0

0

'

Revenue

'

'

'

'

'

'

'

'

'

0

0

0

'

Costs of products sold

'

'

'

'

'

'

'

'

'

0

0

0

'

Operating Costs and Expenses

'

'

'

'

'

'

'

'

'

0

0

0

'

General and administrative

'

'

'

'

'

'

'

'

'

21,560,000

22,105,000

15,564,000

'

Depreciation and amortization

'

'

'

'

'

'

'

'

'

2,001,000

2,496,000

2,930,000

'

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

'

'

'

'

'

'

'

'

'

0

0

1,605,000

'

Costs and Expenses

'

'

'

'

'

'

'

'

'

23,561,000

24,601,000

20,099,000

'

Earnings from equity method investments

'

'

'

'

'

'

'

'

'

67,965,000

66,671,000

32,096,000

'

Gain on issuance of common units by equity method investee

'

'

'

'

'

'

'

'

'

26,873,000

'

'

'

Operating income (loss)

'

'

'

'

'

'

'

'

'

71,277,000

42,070,000

11,997,000

'

Interest Expense

'

'

'

'

'

'

'

'

'

4,826,000

3,942,000

24,352,000

'

Foreign Currency Transaction Gain (Loss), before Tax

'

'

'

'

'

'

'

'

'

0

0

0

'

Other expense (income), net

'

'

'

'

'

'

'

'

'

40,928,000

15,698,000

-12,141,000

'

Other expenses, net

'

'

'

'

'

'

'

'

'

45,754,000

19,640,000

12,211,000

'

Income (loss) from continuing operations before income taxes

'

'

'

'

'

'

'

'

'

25,523,000

22,430,000

-214,000

'

Income tax expense (benefit)

'

'

'

'

'

'

'

'

'

-22,579,000

334,000

-2,485,000

'

Income (Loss) from Continuing Operations Attributable to Parent

'

'

'

'

'

'

'

'

'

48,102,000

22,096,000

2,271,000

'

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

0

4,000

106,000

'

Net income (loss)

'

'

'

'

'

'

'

'

'

48,102,000

22,100,000

2,377,000

'

Less: net income attributable to noncontrolling interests

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income (loss) attributable to SemGroup

'

'

'

'

'

'

'

'

'

48,102,000

22,100,000

2,377,000

'

Other Comprehensive Income (Loss), Net of Tax

'

'

'

'

'

'

'

'

'

-1,517,000

917,000

-1,853,000

'

Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

46,585,000

23,017,000

524,000

'

Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

0

0

0

'

Comprehensive Income (Loss), Net of Tax, Attributable to Parent

'

'

'

'

'

'

'

'

'

46,585,000

23,017,000

524,000

'

Net Cash Provided by (Used in) Operating Activities

'

'

'

'

'

'

'

'

'

20,130,000

-4,535,000

6,817,000

'

Capital expenditures

'

'

'

'

'

'

'

'

'

-734,000

-1,977,000

-2,080,000

'

Proceeds from sale of long-lived assets

'

'

'

'

'

'

'

'

'

23,000

19,000

0

'

Investments in non-consolidated subsidiaries

'

'

'

'

'

'

'

'

'

-18,775,000

-1,740,000

-3,218,000

'

Payments to acquire businesses

'

'

'

'

'

'

'

'

'

0

'

'

'

Proceeds from sale of non-consolidated affiliate

'

'

'

'

'

'

'

'

'

'

0

'

'

Proceeds from the sale of SemStream assets

'

'

'

'

'

'

'

'

'

'

12,250,000

93,054,000

'

Proceeds from Sale of Equity Method Investments

'

'

'

'

'

'

'

'

'

-362,600,000

'

127,134,000

'

Distributions in excess of equity in earnings of affiliates

'

'

'

'

'

'

'

'

'

0

9,218,000

0

'

Net Cash Provided by (Used in) Investing Activities

'

'

'

'

'

'

'

'

'

343,114,000

17,770,000

214,890,000

'

Payments of Debt Issuance Costs

'

'

'

'

'

'

'

'

'

-10,866,000

-455,000

-10,867,000

'

Proceeds from Issuance of Long-term Debt and Capital Securities, Net

'

'

'

'

'

'

'

'

'

706,000,000

318,000,000

255,471,000

'

Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities

'

'

'

'

'

'

'

'

'

-537,500,000

-194,000,000

-498,515,000

'

Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs

'

'

'

'

'

'

'

'

'

0

'

0

'

Distributions to noncontrolling interests

'

'

'

'

'

'

'

'

'

0

0

'

'

Proceeds from warrant exercises

'

'

'

'

'

'

'

'

'

225,000

'

'

'

Repurchase of common stock

'

'

'

'

'

'

'

'

'

-371,000

-242,000

'

'

Dividends paid

'

'

'

'

'

'

'

'

'

-25,429,000

'

'

'

Intercompany payments and receipts

'

'

'

'

'

'

'

'

'

-511,881,000

-117,526,000

25,099,000

'

Net Cash Provided by (Used in) Financing Activities

'

'

'

'

'

'

'

'

'

-379,822,000

5,777,000

-228,812,000

'

Effect of exchange rate changes on cash and cash equivalents

'

'

'

'

'

'

'

'

'

0

0

0

'

Cash and Cash Equivalents, Period Increase (Decrease)

'

'

'

'

'

'

'

'

'

-16,578,000

19,012,000

-7,105,000

'

Change in cash and cash equivalents included in discontinued operations

'

'

'

'

'

'

'

'

'

'

0

0

'

Change in cash and cash equivalents from continuing operations

'

'

'

'

'

'

'

'

'

'

19,012,000

-7,105,000

'

Guarantor Subsidiaries [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

'

0

'

'

'

0

'

'

'

0

0

0

0

Restricted cash

'

0

'

'

'

0

'

'

'

0

0

'

'

Accounts Receivable, net

'

14,642,000

'

'

'

7,927,000

'

'

'

14,642,000

7,927,000

'

'

Receivable from affiliates

'

14,063,000

'

'

'

7,222,000

'

'

'

14,063,000

7,222,000

'

'

Inventories

'

1,046,000

'

'

'

181,000

'

'

'

1,046,000

181,000

'

'

Other current assets

'

193,000

'

'

'

312,000

'

'

'

193,000

312,000

'

'

Total current assets

'

29,944,000

'

'

'

15,642,000

'

'

'

29,944,000

15,642,000

'

'

Property, plant and equipment

'

366,067,000

'

'

'

122,899,000

'

'

'

366,067,000

122,899,000

'

'

Equity method investments

'

461,056,000

'

'

'

468,033,000

'

'

'

461,056,000

468,033,000

'

'

Goodwill

'

23,839,000

'

'

'

0

'

'

'

23,839,000

0

'

'

Other intangible assets

'

163,144,000

'

'

'

0

'

'

'

163,144,000

0

'

'

Other noncurrent assets

'

1,302,000

'

'

'

1,317,000

'

'

'

1,302,000

1,317,000

'

'

Total assets

'

1,045,352,000

'

'

'

607,891,000

'

'

'

1,045,352,000

607,891,000

'

'

Accounts payable

'

24,234,000

'

'

'

12,304,000

'

'

'

24,234,000

12,304,000

'

'

Accrued liabilities

'

17,341,000

'

'

'

4,546,000

'

'

'

17,341,000

4,546,000

'

'

Payables to pre-petition creditors

'

0

'

'

'

0

'

'

'

0

0

'

'

Deferred revenue

'

0

'

'

'

0

'

'

'

0

0

'

'

Other Liabilities, Current

'

'

'

'

'

580,000

'

'

'

'

580,000

'

'

Other current liabilities

'

715,000

'

'

'

'

'

'

'

715,000

'

'

'

Current portion of long-term debt

'

0

'

'

'

0

'

'

'

0

0

'

'

Total current liabilities

'

42,405,000

'

'

'

17,430,000

'

'

'

42,405,000

17,430,000

'

'

Long-term debt

'

0

'

'

'

0

'

'

'

0

0

'

'

Deferred income taxes

'

0

'

'

'

0

'

'

'

0

0

'

'

Other noncurrent liabilities

'

0

'

'

'

0

'

'

'

0

0

'

'

Stockholders' Equity Attributable to Parent

'

1,002,947,000

'

'

'

590,461,000

'

'

'

1,002,947,000

590,461,000

'

'

Noncontrolling interests in consolidated subsidiaries

'

0

'

'

'

0

'

'

'

0

0

'

'

Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest

'

1,002,947,000

'

'

'

590,461,000

'

'

'

1,002,947,000

590,461,000

'

'

Liabilities and Equity

'

1,045,352,000

'

'

'

607,891,000

'

'

'

1,045,352,000

607,891,000

'

'

Sales Revenue, Goods, Gross

'

'

'

'

'

'

'

'

'

224,072,000

123,424,000

712,724,000

'

Sales Revenue, Services, Other

'

'

'

'

'

'

'

'

'

3,868,000

1,198,000

2,778,000

'

Other Revenue, Net

'

'

'

'

'

'

'

'

'

0

387,000

311,000

'

Revenue

'

'

'

'

'

'

'

'

'

227,940,000

125,009,000

715,813,000

'

Costs of products sold

'

'

'

'

'

'

'

'

'

166,735,000

98,224,000

673,927,000

'

Operating Costs and Expenses

'

'

'

'

'

'

'

'

'

19,541,000

12,719,000

14,594,000

'

General and administrative

'

'

'

'

'

'

'

'

'

9,437,000

8,360,000

13,854,000

'

Depreciation and amortization

'

'

'

'

'

'

'

'

'

14,452,000

6,448,000

8,892,000

'

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

'

'

'

'

'

'

'

'

'

668,000

276,000

-46,139,000

'

Costs and Expenses

'

'

'

'

'

'

'

'

'

210,833,000

126,027,000

665,128,000

'

Earnings from equity method investments

'

'

'

'

'

'

'

'

'

54,995,000

85,330,000

-20,736,000

'

Gain on issuance of common units by equity method investee

'

'

'

'

'

'

'

'

'

0

'

'

'

Operating income (loss)

'

'

'

'

'

'

'

'

'

72,102,000

84,312,000

29,949,000

'

Interest Expense

'

'

'

'

'

'

'

'

'

9,781,000

-240,000

19,498,000

'

Foreign Currency Transaction Gain (Loss), before Tax

'

'

'

'

'

'

'

'

'

0

0

39,000

'

Other expense (income), net

'

'

'

'

'

'

'

'

'

0

-21,000

-2,150,000

'

Other expenses, net

'

'

'

'

'

'

'

'

'

9,781,000

-261,000

17,387,000

'

Income (loss) from continuing operations before income taxes

'

'

'

'

'

'

'

'

'

62,321,000

84,573,000

12,562,000

'

Income tax expense (benefit)

'

'

'

'

'

'

'

'

'

0

0

0

'

Income (Loss) from Continuing Operations Attributable to Parent

'

'

'

'

'

'

'

'

'

62,321,000

84,573,000

12,562,000

'

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

65,000

-17,000

28,000

'

Net income (loss)

'

'

'

'

'

'

'

'

'

62,386,000

84,556,000

12,590,000

'

Less: net income attributable to noncontrolling interests

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income (loss) attributable to SemGroup

'

'

'

'

'

'

'

'

'

62,386,000

84,556,000

12,590,000

'

Other Comprehensive Income (Loss), Net of Tax

'

'

'

'

'

'

'

'

'

0

0

0

'

Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

62,386,000

84,556,000

12,590,000

'

Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

0

0

0

'

Comprehensive Income (Loss), Net of Tax, Attributable to Parent

'

'

'

'

'

'

'

'

'

62,386,000

84,556,000

12,590,000

'

Net Cash Provided by (Used in) Operating Activities

'

'

'

'

'

'

'

'

'

24,642,000

6,236,000

44,957,000

'

Capital expenditures

'

'

'

'

'

'

'

'

'

-123,246,000

-59,317,000

-16,865,000

'

Proceeds from sale of long-lived assets

'

'

'

'

'

'

'

'

'

19,000

-202,000

82,000

'

Investments in non-consolidated subsidiaries

'

'

'

'

'

'

'

'

'

-57,850,000

-74,434,000

-23,000

'

Payments to acquire businesses

'

'

'

'

'

'

'

'

'

-313,487,000

'

'

'

Proceeds from sale of non-consolidated affiliate

'

'

'

'

'

'

'

'

'

'

0

'

'

Proceeds from the sale of SemStream assets

'

'

'

'

'

'

'

'

'

'

0

0

'

Proceeds from Sale of Equity Method Investments

'

'

'

'

'

'

'

'

'

0

'

0

'

Distributions in excess of equity in earnings of affiliates

'

'

'

'

'

'

'

'

'

0

0

0

'

Net Cash Provided by (Used in) Investing Activities

'

'

'

'

'

'

'

'

'

-494,564,000

-133,953,000

-16,806,000

'

Payments of Debt Issuance Costs

'

'

'

'

'

'

'

'

'

0

0

0

'

Proceeds from Issuance of Long-term Debt and Capital Securities, Net

'

'

'

'

'

'

'

'

'

0

0

0

'

Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities

'

'

'

'

'

'

'

'

'

0

0

-21,000

'

Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs

'

'

'

'

'

'

'

'

'

0

'

0

'

Distributions to noncontrolling interests

'

'

'

'

'

'

'

'

'

0

0

'

'

Proceeds from warrant exercises

'

'

'

'

'

'

'

'

'

0

'

'

'

Repurchase of common stock

'

'

'

'

'

'

'

'

'

0

0

'

'

Dividends paid

'

'

'

'

'

'

'

'

'

0

'

'

'

Intercompany payments and receipts

'

'

'

'

'

'

'

'

'

469,922,000

127,717,000

-28,130,000

'

Net Cash Provided by (Used in) Financing Activities

'

'

'

'

'

'

'

'

'

469,922,000

127,717,000

-28,151,000

'

Effect of exchange rate changes on cash and cash equivalents

'

'

'

'

'

'

'

'

'

0

0

0

'

Cash and Cash Equivalents, Period Increase (Decrease)

'

'

'

'

'

'

'

'

'

0

0

0

'

Change in cash and cash equivalents included in discontinued operations

'

'

'

'

'

'

'

'

'

'

0

0

'

Change in cash and cash equivalents from continuing operations

'

'

'

'

'

'

'

'

'

'

0

0

'

Non-Guarantor Subsidiaries [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

'

78,364,000

'

'

'

63,844,000

'

'

'

78,364,000

63,844,000

76,264,000

81,316,000

Restricted cash

'

1,268,000

'

'

'

1,354,000

'

'

'

1,268,000

1,354,000

'

'

Accounts Receivable, net

'

308,674,000

'

'

'

337,087,000

'

'

'

308,674,000

337,087,000

'

'

Receivable from affiliates

'

56,040,000

'

'

'

109,000

'

'

'

56,040,000

109,000

'

'

Inventories

'

43,249,000

'

'

'

34,252,000

'

'

'

43,249,000

34,252,000

'

'

Other current assets

'

5,106,000

'

'

'

15,676,000

'

'

'

5,106,000

15,676,000

'

'

Total current assets

'

492,701,000

'

'

'

452,322,000

'

'

'

492,701,000

452,322,000

'

'

Property, plant and equipment

'

735,547,000

'

'

'

686,426,000

'

'

'

735,547,000

686,426,000

'

'

Equity method investments

'

159,321,000

'

'

'

138,970,000

'

'

'

159,321,000

138,970,000

'

'

Goodwill

'

38,182,000

'

'

'

9,884,000

'

'

'

38,182,000

9,884,000

'

'

Other intangible assets

'

11,663,000

'

'

'

7,549,000

'

'

'

11,663,000

7,549,000

'

'

Other noncurrent assets

'

12,324,000

'

'

'

3,258,000

'

'

'

12,324,000

3,258,000

'

'

Total assets

'

1,449,738,000

'

'

'

1,298,409,000

'

'

'

1,449,738,000

1,298,409,000

'

'

Accounts payable

'

229,061,000

'

'

'

241,249,000

'

'

'

229,061,000

241,249,000

'

'

Accrued liabilities

'

56,011,000

'

'

'

50,313,000

'

'

'

56,011,000

50,313,000

'

'

Payables to pre-petition creditors

'

53,000

'

'

'

57,000

'

'

'

53,000

57,000

'

'

Deferred revenue

'

25,538,000

'

'

'

18,973,000

'

'

'

25,538,000

18,973,000

'

'

Other Liabilities, Current

'

'

'

'

'

4,263,000

'

'

'

'

4,263,000

'

'

Other current liabilities

'

7,697,000

'

'

'

'

'

'

'

7,697,000

'

'

'

Current portion of long-term debt

'

37,000

'

'

'

24,000

'

'

'

37,000

24,000

'

'

Total current liabilities

'

385,459,000

'

'

'

314,879,000

'

'

'

385,459,000

314,879,000

'

'

Long-term debt

'

245,088,000

'

'

'

4,562,000

'

'

'

245,088,000

4,562,000

'

'

Deferred income taxes

'

52,509,000

'

'

'

63,602,000

'

'

'

52,509,000

63,602,000

'

'

Other noncurrent liabilities

'

41,496,000

'

'

'

47,759,000

'

'

'

41,496,000

47,759,000

'

'

Stockholders' Equity Attributable to Parent

'

565,225,000

'

'

'

738,473,000

'

'

'

565,225,000

738,473,000

'

'

Noncontrolling interests in consolidated subsidiaries

'

159,961,000

'

'

'

129,134,000

'

'

'

159,961,000

129,134,000

'

'

Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest

'

725,186,000

'

'

'

867,607,000

'

'

'

725,186,000

867,607,000

'

'

Liabilities and Equity

'

1,449,738,000

'

'

'

1,298,409,000

'

'

'

1,449,738,000

1,298,409,000

'

'

Sales Revenue, Goods, Gross

'

'

'

'

'

'

'

'

'

944,984,000

840,892,000

609,870,000

'

Sales Revenue, Services, Other

'

'

'

'

'

'

'

'

'

136,330,000

116,523,000

120,567,000

'

Other Revenue, Net

'

'

'

'

'

'

'

'

'

141,714,000

165,651,000

104,277,000

'

Revenue

'

'

'

'

'

'

'

'

'

1,223,028,000

1,123,066,000

834,714,000

'

Costs of products sold

'

'

'

'

'

'

'

'

'

877,317,000

787,239,000

555,793,000

'

Operating Costs and Expenses

'

'

'

'

'

'

'

'

'

204,044,000

211,981,000

140,447,000

'

General and administrative

'

'

'

'

'

'

'

'

'

47,600,000

41,453,000

46,029,000

'

Depreciation and amortization

'

'

'

'

'

'

'

'

'

49,956,000

39,266,000

38,001,000

'

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

'

'

'

'

'

'

'

'

'

-907,000

-3,807,000

44,835,000

'

Costs and Expenses

'

'

'

'

'

'

'

'

'

1,178,010,000

1,076,132,000

825,105,000

'

Earnings from equity method investments

'

'

'

'

'

'

'

'

'

44,203,000

36,439,000

15,004,000

'

Gain on issuance of common units by equity method investee

'

'

'

'

'

'

'

'

'

0

'

'

'

Operating income (loss)

'

'

'

'

'

'

'

'

'

89,221,000

83,373,000

24,613,000

'

Interest Expense

'

'

'

'

'

'

'

'

'

15,947,000

11,056,000

21,157,000

'

Foreign Currency Transaction Gain (Loss), before Tax

'

'

'

'

'

'

'

'

'

-1,633,000

298,000

-3,489,000

'

Other expense (income), net

'

'

'

'

'

'

'

'

'

-434,000

-262,000

-2,117,000

'

Other expenses, net

'

'

'

'

'

'

'

'

'

13,880,000

11,092,000

15,551,000

'

Income (loss) from continuing operations before income taxes

'

'

'

'

'

'

'

'

'

75,341,000

72,281,000

9,062,000

'

Income tax expense (benefit)

'

'

'

'

'

'

'

'

'

5,325,000

-2,412,000

175,000

'

Income (Loss) from Continuing Operations Attributable to Parent

'

'

'

'

'

'

'

'

'

70,016,000

74,693,000

8,887,000

'

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

-6,000

2,952,000

-9,682,000

'

Net income (loss)

'

'

'

'

'

'

'

'

'

70,010,000

77,645,000

-795,000

'

Less: net income attributable to noncontrolling interests

'

'

'

'

'

'

'

'

'

17,710,000

9,797,000

435,000

'

Net income (loss) attributable to SemGroup

'

'

'

'

'

'

'

'

'

52,300,000

67,848,000

-1,230,000

'

Other Comprehensive Income (Loss), Net of Tax

'

'

'

'

'

'

'

'

'

-38,000

11,659,000

-13,137,000

'

Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

69,972,000

89,304,000

-13,932,000

'

Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

17,710,000

9,797,000

435,000

'

Comprehensive Income (Loss), Net of Tax, Attributable to Parent

'

'

'

'

'

'

'

'

'

52,262,000

79,507,000

-14,367,000

'

Net Cash Provided by (Used in) Operating Activities

'

'

'

'

'

'

'

'

'

148,872,000

93,534,000

17,004,000

'

Capital expenditures

'

'

'

'

'

'

'

'

'

-91,629,000

-58,025,000

-47,050,000

'

Proceeds from sale of long-lived assets

'

'

'

'

'

'

'

'

'

1,237,000

2,824,000

1,043,000

'

Investments in non-consolidated subsidiaries

'

'

'

'

'

'

'

'

'

-97,243,000

-2,079,000

-476,000

'

Payments to acquire businesses

'

'

'

'

'

'

'

'

'

-48,969,000

'

'

'

Proceeds from sale of non-consolidated affiliate

'

'

'

'

'

'

'

'

'

'

3,500,000

'

'

Proceeds from the sale of SemStream assets

'

'

'

'

'

'

'

'

'

'

0

0

'

Proceeds from Sale of Equity Method Investments

'

'

'

'

'

'

'

'

'

0

'

0

'

Distributions in excess of equity in earnings of affiliates

'

'

'

'

'

'

'

'

'

12,246,000

8,072,000

12,455,000

'

Net Cash Provided by (Used in) Investing Activities

'

'

'

'

'

'

'

'

'

-224,358,000

-45,708,000

-34,028,000

'

Payments of Debt Issuance Costs

'

'

'

'

'

'

'

'

'

-4,070,000

-252,000

-1,666,000

'

Proceeds from Issuance of Long-term Debt and Capital Securities, Net

'

'

'

'

'

'

'

'

'

562,474,000

0

8,434,000

'

Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities

'

'

'

'

'

'

'

'

'

-321,912,000

-28,066,000

-4,653,000

'

Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs

'

'

'

'

'

'

'

'

'

210,226,000

'

127,134,000

'

Distributions to noncontrolling interests

'

'

'

'

'

'

'

'

'

-17,647,000

-8,502,000

'

'

Proceeds from warrant exercises

'

'

'

'

'

'

'

'

'

0

'

'

'

Repurchase of common stock

'

'

'

'

'

'

'

'

'

0

0

'

'

Dividends paid

'

'

'

'

'

'

'

'

'

0

'

'

'

Intercompany payments and receipts

'

'

'

'

'

'

'

'

'

-342,256,000

-25,608,000

-116,789,000

'

Net Cash Provided by (Used in) Financing Activities

'

'

'

'

'

'

'

'

'

86,815,000

-62,428,000

12,460,000

'

Effect of exchange rate changes on cash and cash equivalents

'

'

'

'

'

'

'

'

'

3,191,000

-610,000

-34,000

'

Cash and Cash Equivalents, Period Increase (Decrease)

'

'

'

'

'

'

'

'

'

14,520,000

-15,212,000

-4,598,000

'

Change in cash and cash equivalents included in discontinued operations

'

'

'

'

'

'

'

'

'

'

2,792,000

-454,000

'

Change in cash and cash equivalents from continuing operations

'

'

'

'

'

'

'

'

'

'

-12,420,000

-5,052,000

'

Consolidation, Eliminations [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

'

-1,558,000

'

'

'

-2,938,000

'

'

'

-1,558,000

-2,938,000

-2,762,000

-711,000

Restricted cash

'

0

'

'

'

0

'

'

'

0

0

'

'

Accounts Receivable, net

'

0

'

'

'

0

'

'

'

0

0

'

'

Receivable from affiliates

'

-4,349,000

'

'

'

-1,980,000

'

'

'

-4,349,000

-1,980,000

'

'

Inventories

'

0

'

'

'

0

'

'

'

0

0

'

'

Other current assets

'

0

'

'

'

0

'

'

'

0

0

'

'

Total current assets

'

-5,907,000

'

'

'

-4,918,000

'

'

'

-5,907,000

-4,918,000

'

'

Property, plant and equipment

'

0

'

'

'

0

'

'

'

0

0

'

'

Equity method investments

'

-1,567,175,000

'

'

'

-1,324,033,000

'

'

'

-1,567,175,000

-1,324,033,000

'

'

Goodwill

'

0

'

'

'

0

'

'

'

0

0

'

'

Other intangible assets

'

0

'

'

'

0

'

'

'

0

0

'

'

Other noncurrent assets

'

0

'

'

'

0

'

'

'

0

0

'

'

Total assets

'

-1,573,082,000

'

'

'

-1,328,951,000

'

'

'

-1,573,082,000

-1,328,951,000

'

'

Accounts payable

'

0

'

'

'

0

'

'

'

0

0

'

'

Accrued liabilities

'

5,000

'

'

'

0

'

'

'

5,000

0

'

'

Payables to pre-petition creditors

'

0

'

'

'

0

'

'

'

0

0

'

'

Deferred revenue

'

0

'

'

'

0

'

'

'

0

0

'

'

Other Liabilities, Current

'

'

'

'

'

-17,000

'

'

'

'

-17,000

'

'

Other current liabilities

'

0

'

'

'

'

'

'

'

0

'

'

'

Current portion of long-term debt

'

0

'

'

'

0

'

'

'

0

0

'

'

Total current liabilities

'

-4,910,000

'

'

'

-17,000

'

'

'

-4,910,000

-17,000

'

'

Long-term debt

'

0

'

'

'

0

'

'

'

0

0

'

'

Deferred income taxes

'

0

'

'

'

0

'

'

'

0

0

'

'

Other noncurrent liabilities

'

0

'

'

'

0

'

'

'

0

0

'

'

Stockholders' Equity Attributable to Parent

'

-1,568,172,000

'

'

'

-1,328,934,000

'

'

'

-1,568,172,000

-1,328,934,000

'

'

Noncontrolling interests in consolidated subsidiaries

'

0

'

'

'

0

'

'

'

0

0

'

'

Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest

'

-1,568,172,000

'

'

'

-1,328,934,000

'

'

'

-1,568,172,000

-1,328,934,000

'

'

Liabilities and Equity

'

-1,573,082,000

'

'

'

-1,328,951,000

'

'

'

-1,573,082,000

-1,328,951,000

'

'

Sales Revenue, Goods, Gross

'

'

'

'

'

'

'

'

'

-23,952,000

-10,578,000

-85,281,000

'

Sales Revenue, Services, Other

'

'

'

'

'

'

'

'

'

0

0

0

'

Other Revenue, Net

'

'

'

'

'

'

'

'

'

0

0

0

'

Revenue

'

'

'

'

'

'

'

'

'

-23,952,000

-10,578,000

-85,281,000

'

Costs of products sold

'

'

'

'

'

'

'

'

'

-23,952,000

-10,578,000

-85,281,000

'

Operating Costs and Expenses

'

'

'

'

'

'

'

'

'

0

0

0

'

General and administrative

'

'

'

'

'

'

'

'

'

0

0

0

'

Depreciation and amortization

'

'

'

'

'

'

'

'

'

0

0

0

'

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

'

'

'

'

'

'

'

'

'

0

0

0

'

Costs and Expenses

'

'

'

'

'

'

'

'

'

-23,952,000

-10,578,000

-85,281,000

'

Earnings from equity method investments

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Gain on issuance of common units by equity method investee

'

'

'

'

'

'

'

'

'

0

'

'

'

Operating income (loss)

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Interest Expense

'

'

'

'

'

'

'

'

'

-5,412,000

-5,856,000

-4,869,000

'

Foreign Currency Transaction Gain (Loss), before Tax

'

'

'

'

'

'

'

'

'

0

0

0

'

Other expense (income), net

'

'

'

'

'

'

'

'

'

5,412,000

5,856,000

4,869,000

'

Other expenses, net

'

'

'

'

'

'

'

'

'

0

0

0

'

Income (loss) from continuing operations before income taxes

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Income tax expense (benefit)

'

'

'

'

'

'

'

'

'

0

0

0

'

Income (Loss) from Continuing Operations Attributable to Parent

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

0

0

0

'

Net income (loss)

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Less: net income attributable to noncontrolling interests

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income (loss) attributable to SemGroup

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Other Comprehensive Income (Loss), Net of Tax

'

'

'

'

'

'

'

'

'

0

0

0

'

Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest

'

'

'

'

'

'

'

'

'

0

0

0

'

Comprehensive Income (Loss), Net of Tax, Attributable to Parent

'

'

'

'

'

'

'

'

'

-114,686,000

-152,404,000

-11,360,000

'

Net Cash Provided by (Used in) Operating Activities

'

'

'

'

'

'

'

'

'

-20,235,000

-15,593,000

5,263,000

'

Capital expenditures

'

'

'

'

'

'

'

'

'

0

0

0

'

Proceeds from sale of long-lived assets

'

'

'

'

'

'

'

'

'

0

0

0

'

Investments in non-consolidated subsidiaries

'

'

'

'

'

'

'

'

'

0

0

0

'

Payments to acquire businesses

'

'

'

'

'

'

'

'

'

0

'

'

'

Proceeds from sale of non-consolidated affiliate

'

'

'

'

'

'

'

'

'

'

0

'

'

Proceeds from the sale of SemStream assets

'

'

'

'

'

'

'

'

'

'

0

0

'

Proceeds from Sale of Equity Method Investments

'

'

'

'

'

'

'

'

'

362,600,000

'

-127,134,000

'

Distributions in excess of equity in earnings of affiliates

'

'

'

'

'

'

'

'

'

0

0

0

'

Net Cash Provided by (Used in) Investing Activities

'

'

'

'

'

'

'

'

'

-362,600,000

0

-127,134,000

'

Payments of Debt Issuance Costs

'

'

'

'

'

'

'

'

'

0

0

0

'

Proceeds from Issuance of Long-term Debt and Capital Securities, Net

'

'

'

'

'

'

'

'

'

0

0

0

'

Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities

'

'

'

'

'

'

'

'

'

0

0

0

'

Proceeds from issuance of Rose Rock Midstream, L.P. common units, net of offering costs

'

'

'

'

'

'

'

'

'

0

'

0

'

Distributions to noncontrolling interests

'

'

'

'

'

'

'

'

'

0

0

'

'

Proceeds from warrant exercises

'

'

'

'

'

'

'

'

'

0

'

'

'

Repurchase of common stock

'

'

'

'

'

'

'

'

'

0

0

'

'

Dividends paid

'

'

'

'

'

'

'

'

'

0

'

'

'

Intercompany payments and receipts

'

'

'

'

'

'

'

'

'

384,215,000

15,417,000

119,820,000

'

Net Cash Provided by (Used in) Financing Activities

'

'

'

'

'

'

'

'

'

384,215,000

15,417,000

119,820,000

'

Effect of exchange rate changes on cash and cash equivalents

'

'

'

'

'

'

'

'

'

0

0

0

'

Cash and Cash Equivalents, Period Increase (Decrease)

'

'

'

'

'

'

'

'

'

1,380,000

-176,000

-2,051,000

'

Change in cash and cash equivalents included in discontinued operations

'

'

'

'

'

'

'

'

'

'

0

0

'

Change in cash and cash equivalents from continuing operations

'

'

'

'

'

'

'

'

'

'

($176,000)

($2,051,000)

'