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Rose Rock Midstream, L.P. (Details Textual) - Subsequent Event Type [Domain] - Distribution Type [Domain] - Equity Interest Issued Or Issuable Type [Domain]
$ in Millions
6 Months Ended
Feb. 17, 2015
shares
Feb. 13, 2015
USD ($)
Jan. 02, 2015
shares
Jun. 30, 2015
$ / Unit
Glass Mountain Pipeline LLC [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Equity method investment, ownership percentage       50.00%
Rose Rock Midstream, L.P. [Member] | Class A [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Limited partners' capital account, units converted to common     3,750,000  
Rose Rock Midstream, L.P. [Member] | Subordinated Units [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Limited partners' capital account, units converted to common 8,389,709      
Limited Partner [Member] | Rose Rock Midstream, L.P. [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Limited partner ownership interest       55.20%
General Partner [Member] | Rose Rock Midstream, L.P. [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
General partner ownership interest       2.00%
First Target Distribution [Member] | Minimum [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Partners' minimum quarterly distribution per unit | $ / Unit       0.3625
Rose Rock Midstream, L.P. [Member] | Contribution of WOT and 50% interest in Glass Mountain [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Cash paid by subsidiary for acquisition in common control transaction | $   $ 251.2    
Rose Rock Midstream, L.P. [Member] | Contribution of WOT and 50% interest in Glass Mountain [Member] | Common Units [Member]        
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Units received as consideration in WOT and Glass Mountain transaction   1.75