Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.3.0.814
Fair Value Measurements (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Liabilities:      
Asset retirement obligation capitalized $ 5,736 $ 5,713  
Mammoth Energy Partners LP [Member]      
Liabilities:      
Equity investment     $ 143,500
Level 1 [Member]      
Assets:      
Derivative Instruments 167,271    
Liabilities:      
Derivative Instruments 5,559    
Level 2 [Member]      
Assets:      
Derivative Instruments 0    
Liabilities:      
Derivative Instruments 0    
Level 3 [Member]      
Assets:      
Derivative Instruments 0    
Liabilities:      
Derivative Instruments 0    
Asset retirement obligation capitalized $ 5,700    
Level 3 [Member] | Mammoth Energy Partners LP [Member]      
Liabilities:      
Equity investment     $ 143,500