Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 315,525	$ 40,598
Restricted cash	6,396	6,980
Accounts receivable (net of allowance of $3,488 and $3,260, respectively)	290,353us-gaap_AccountsReceivableNetCurrent	351,334us-gaap_AccountsReceivableNetCurrent
Receivable from affiliates	15,156us-gaap_DueFromRelatedPartiesCurrent	16,819us-gaap_DueFromRelatedPartiesCurrent
Inventories	67,770us-gaap_InventoryNet	43,532us-gaap_InventoryNet
Other current assets	15,770us-gaap_OtherAssetsCurrent	20,017us-gaap_OtherAssetsCurrent
Total current assets	710,970us-gaap_AssetsCurrent	479,280us-gaap_AssetsCurrent
Property, plant and equipment (net of accumulated depreciation of $259,980 and $245,629, respectively)	1,303,781us-gaap_PropertyPlantAndEquipmentNet	1,256,825us-gaap_PropertyPlantAndEquipmentNet
Equity method investments	561,463us-gaap_EquityMethodInvestments	577,920us-gaap_EquityMethodInvestments
Goodwill	58,159us-gaap_Goodwill	58,326us-gaap_Goodwill
Other intangible assets (net of accumulated amortization of $22,859 and $20,545, respectively)	170,362	173,065
Other noncurrent assets, net	56,805us-gaap_OtherAssetsNoncurrent	44,386us-gaap_OtherAssetsNoncurrent
Total assets	2,861,540us-gaap_Assets	2,589,802us-gaap_Assets
Current liabilities:
Accounts payable	222,712us-gaap_AccountsPayableCurrent	257,177us-gaap_AccountsPayableCurrent
Payable to affiliates	16,188us-gaap_DueToRelatedPartiesCurrent	13,460us-gaap_DueToRelatedPartiesCurrent
Accrued liabilities	83,473us-gaap_AccruedLiabilitiesCurrent	92,694us-gaap_AccruedLiabilitiesCurrent
Payables to pre-petition creditors	3,130semg_PayableToPrePetitionCreditors	3,129semg_PayableToPrePetitionCreditors
Deferred revenue	20,602us-gaap_DeferredRevenueCurrent	23,688us-gaap_DeferredRevenueCurrent
Other current liabilities	3,236us-gaap_OtherLiabilitiesCurrent	1,474us-gaap_OtherLiabilitiesCurrent
Current portion of long-term debt	47	40
Total current liabilities	349,388us-gaap_LiabilitiesCurrent	391,662us-gaap_LiabilitiesCurrent
Long-term debt	1,027,072	767,092
Deferred income taxes	175,562	161,956
Other noncurrent liabilities	47,576us-gaap_OtherLiabilitiesNoncurrent	49,655us-gaap_OtherLiabilitiesNoncurrent
Commitments and contingencies (Note 9)
SemGroup owners’ equity:
Common stock, $0.01 par value (authorized - 100,000 shares; issued - 44,822 and 44,689 shares, respectively)	439us-gaap_CommonStockValue	436us-gaap_CommonStockValue
Additional paid-in capital	1,266,325	1,245,877
Treasury stock, at cost (922 and 862 shares, respectively)	(4,962)us-gaap_TreasuryStockValue	(1,332)us-gaap_TreasuryStockValue
Accumulated deficit	(66,866)	(68,332)
Accumulated other comprehensive loss	(36,201)	(27,141)
Total SemGroup Corporation owners’ equity	1,158,735us-gaap_StockholdersEquity	1,149,508us-gaap_StockholdersEquity
Noncontrolling interests in consolidated subsidiaries	103,207us-gaap_MinorityInterest	69,929us-gaap_MinorityInterest
Total owners’ equity	1,261,942	1,219,437
Total liabilities and owners’ equity	$ 2,861,540	$ 2,589,802

Accruals for payments to be made to pre-petition creditors in settlement of liabilities subject to compromise.

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