Consolidated Statements of Changes in Owners' Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning 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), net of income taxes	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
Warrants exercised	631	0	631	0	0	0	0
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)
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), net of income taxes	(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
Warrants exercised	21,379	4	21,375	0	0	0	0
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)
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
Net income (loss)	52,057	0	0	0	29,240	0	22,817
Other comprehensive income (loss), net of income taxes	(24,287)	0	0	0	0	(24,287)	0
Distributions to noncontrolling interests	(28,494)	0	0	0	0	0	(28,494)
Non-cash equity compensation	8,262	0	7,319	0	0	0	943
Warrants exercised	73,017	9	73,008	0	0	0	0
Issuance of common stock under compensation plans	2,172	2	2,170	0	0	0	0
Repurchase of common stock	(719)	0	0	(719)	0	0	0
Transfer of SemCrude Pipeline interest to Rose Rock	(31,930)	0	53,243	0	0	0	(85,173)
Dividends paid	(44,206)	0	(44,206)	0	0	0	0
Unvested dividend equivalent rights	(298)	0	(173)	0	0	0	(125)
Ending Balance at Dec. 31, 2014	$ 1,219,437	$ 436	$ 1,245,877	$ (1,332)	$ (68,332)	$ (27,141)	$ 69,929