Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Product	$ 241,253	$ 237,571	$ 476,882	$ 499,206
Service	31,678	29,615	59,335	56,928
Other	51,313	64,591	75,723	87,674
Total revenues	324,244	331,777	611,940	643,808
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	212,709	219,936	425,078	461,457
Operating	69,682	82,389	110,453	120,380
General and administrative	16,898	16,561	33,935	36,391
Depreciation and amortization	12,814	11,882	25,450	23,607
(Gain) loss on disposal of long-lived assets, net	(376)	119	(538)	119
Total expenses	311,727	330,887	594,378	641,954
Earnings from equity method investments	14,861	12,289	32,206	19,787
Operating income	27,378	13,179	49,768	21,641
Other expenses (income):
Interest expense	4,495	2,114	6,891	5,773
Foreign currency transaction (gain) loss	(349)	(35)	(516)	2
Other expense, net	6,467	3,508	32,100	7,428
Total other expenses, net	10,613	5,587	38,475	13,203
Income from continuing operations before income taxes	16,765	7,592	11,293	8,438
Income tax expense (benefit)	9,288	(92)	(44,718)	(1,104)
Income from continuing operations	7,477	7,684	56,011	9,542
Income (loss) from discontinued operations, net of income taxes	35	(441)	67	(189)
Net income	7,512	7,243	56,078	9,353
Less: net income attributable to noncontrolling interests	3,943	2,096	9,065	5,579
Net income (loss) attributable to SemGroup	3,569	5,147	47,013	3,774
Other comprehensive income (loss), net of income taxes	(5,354)	(9,897)	(10,412)	2,858
Comprehensive income (loss)	2,158	(2,654)	45,666	12,211
Less: comprehensive income attributable to noncontrolling interests	3,943	2,096	9,065	5,579
Comprehensive income (loss) attributable to SemGroup	$ (1,785)	$ (4,750)	$ 36,601	$ 6,632
Net income per common share (Note 11):
Basic	$ 0.08	$ 0.12	$ 1.12	$ 0.09
Diluted	$ 0.08	$ 0.12	$ 1.11	$ 0.09