Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 74,958	$ 79,351
Restricted cash	7,672	5,119
Accounts receivable (net of allowance of $3,475 and $3,661, respectively)	381,149	323,965
Receivable from affiliates	52,281	67,273
Inventories	38,822	44,295
Other current assets	11,826	14,011
Total current assets	566,708	534,014
Property, plant and equipment (net of accumulated depreciation of $200,193 and $188,720, respectively)	1,137,540	1,105,728
Equity method investments	593,538	565,124
Goodwill	61,923	62,021
Other intangible assets (net of accumulated amortization of $14,815 and $12,655, respectively)	171,801	174,838
Other noncurrent assets, net	29,884	28,889
Total assets	2,561,394	2,470,614
Current liabilities:
Accounts payable	323,520	254,467
Payable to affiliates	38,203	62,279
Accrued liabilities	69,693	83,429
Payables to pre-petition creditors	3,179	3,177
Warrant liability	57,155	58,134
Deferred revenue	23,204	25,538
Other current liabilities	5,742	12,153
Current portion of long-term debt	38	37
Total current liabilities	520,734	499,214
Long-term debt	672,578	615,088
Deferred income taxes	108,761	100,945
Other noncurrent liabilities	41,062	41,504
Commitments and contingencies (Note 9)
SemGroup owners’ equity:
Common stock, $0.01 par value (authorized - 100,000 shares; issued - 42,673 and 42,533 shares, respectively)	427	425
Additional paid-in capital	1,149,024	1,154,516
Treasury stock, at cost (449 and 438 shares, respectively)	(1,332)	(613)
Accumulated deficit	(83,984)	(97,572)
Accumulated other comprehensive loss	(5,826)	(2,854)
Total SemGroup Corporation owners’ equity	1,058,309	1,053,902
Noncontrolling interests in consolidated subsidiaries	159,950	159,961
Total owners’ equity	1,218,259	1,213,863
Total liabilities and owners’ equity	$ 2,561,394	$ 2,470,614