Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Product	$ 953,738	$ 1,237,313	$ 1,343,782
Service	117,721	123,345	180,975
Other	166,038	104,588	93,655
Total revenues	1,237,497	1,465,246	1,618,412
Expenses:
Costs of products sold, exclusive of depreciation and amortization shown below	874,885	1,144,439	1,258,695
Operating	224,700	155,041	151,385
General and administrative	71,918	75,447	85,836
Depreciation and amortization	48,210	49,823	69,158
(Gain) loss on disposal or impairment of long-lived assets, net	(3,531)	301	105,051
Total expenses	1,216,182	1,425,051	1,670,125
Earnings from equity method investments	36,036	15,004	1,949
Operating income (loss)	57,351	55,199	(49,764)
Other expenses (income):
Interest expense	8,902	60,138	86,121
Foreign currency transaction loss (gain)	298	(3,450)	2,899
Other expense (income), net	21,271	(11,539)	1,439
Total other expenses, net	30,471	45,149	90,459
Income (loss) from continuing operations before income taxes	26,880	10,050	(140,223)
Income tax expense (benefit)	(2,078)	(2,310)	(6,320)
Income (loss) from continuing operations	28,958	12,360	(133,903)
Income (loss) from discontinued operations, net of income taxes	2,939	(9,548)	1,831
Net income (loss)	31,897	2,812	(132,072)
Less: net income attributable to noncontrolling interests	9,797	435	225
Net income (loss) attributable to SemGroup	22,100	2,377	(132,297)
Other comprehensive income (loss):
Currency translation adjustments	12,635	(13,075)	6,475
Other, net of income tax	(59)	(1,915)	(2,026)
Total other comprehensive income (loss)	12,576	(14,990)	4,449
Comprehensive income (loss)	44,473	(12,178)	(127,623)
Less: comprehensive income attributable to noncontrolling interests	9,797	435	225
Comprehensive income (loss) attributable to SemGroup	$ 34,676	$ (12,613)	$ (127,848)
Net income (loss) per common share (Note 18):
Basic	$ 0.53	$ 0.06	$ (3.20)
Diluted	$ 0.52	$ (0.06)	$ (3.20)