Rose Rock Midstream, L.P. (Details Textual) (USD $)	3 Months Ended	9 Months Ended				0 Months Ended		9 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended			0 Months Ended			9 Months Ended			0 Months Ended	9 Months Ended			9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 mi	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013 Semcrude Pipeline [Member]	Jan. 11, 2013 SemCrude Pipeline [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member]	Mar. 31, 2013 Rose Rock Midstream, L.P. [Member] Semcrude Pipeline [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Common Units [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member] Common Units [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Class A [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member] Class A [Member]	Sep. 30, 2013 Rose Rock Midstream, L.P. [Member] Subordinated Units [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Private Placement [Member]	Jan. 11, 2013 Rose Rock Midstream, L.P. [Member] Private Placement [Member] Common Units [Member]	Jan. 11, 2013 White Cliffs Pipeline, L.L.C. [Member] bbl	Sep. 30, 2013 White Cliffs Pipeline, L.L.C. [Member] mi	Sep. 30, 2013 SemCrude Pipeline [Member]	Jan. 11, 2013 SemCrude Pipeline [Member] White Cliffs Pipeline, L.L.C. [Member]	Jan. 11, 2013 Revolving Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Revolving Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Jan. 13, 2013 Revolving Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Dec. 31, 2012 Revolving Credit Facility [Member] Rose Rock Credit Facility [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Limited Partner [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 General Partner [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 General Partner [Member] Rose Rock Midstream, L.P. [Member]	Sep. 30, 2013 Noncontrolling Interest [Member]		Sep. 30, 2013 Additional Paid-In Capital [Member]
Subsidiary (Textual) [Abstract]
Common units representing limited partner interests											2,900,000		1,250,000	8,400,000
Partners' minimum quarterly distribution per unit	$ 0.3625	$ 0.3625
Partners' Capital Account, Units, Sold in Public Offering											4,750,000
Proceeds from Noncontrolling Interests	$ 152,500,000
Equity Method Investment, Ownership Percentage					33.00%													17.00%	33.00%	51.00%
Length Of Pipeline Network	210																	527
Gain (Loss) on Sale of Equity Investments						0
Sale of interest in equity investment to related party		33,716,000	[1]																									90,516,000	[1]	(56,800,000)	[1]
Tax effect of adjustment to APIC from sale of equity investment to less than wholly owned subsidiary		33,700,000
Proceeds from Issuance of Private Placement																2,000,000
Business Acquisition, Cost of Acquired Entity, Cash Paid		143,463,000		63,999,000					189,500,000
Stock Issued During Period, Shares, New Issues										1,500,000		1,250,000
Average daily throughput threshold in barrels for conversion of Class A units																	125,000
Proceeds from Issuance of Common Stock															59,300,000
Line of Credit Facility, Current Borrowing Capacity																							385,000,000	150,000,000
Proceeds from Lines of Credit							133,500,000														133,500,000
General Partner Ownership Interest																										2.00%	2.00%
Transaction related costs		1,400,000						3,700,000
Limited Partnership Unit Issuance Costs, Incurred								1,600,000
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest																									46.70%
Debt Issuance Cost																						1,600,000
Business Combination, Acquisition Related Costs								$ 500,000

[1] * On January 13, 2013, we contributed a 33% interest in SemCrude Pipeline, L.L.C. to our consolidated subsidiary, Rose Rock. As this transaction was between entities under common control, the interest in SemCrude Pipeline, L.L.C. was recorded by Rose Rock based on SemGroup's book value. This amount represents the purchase price in excess of book value which was attributed to the noncontrolling interest owners of Rose Rock. The entry to additional paid-in capital has been recorded net of tax.