Quarterly report pursuant to Section 13 or 15(d)

Equity Investments (Investments Accounted For By The Equity Method) (Details)

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Equity Investments (Investments Accounted For By The Equity Method) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Oct. 11, 2012
Schedule of Equity Method Investments [Line Items]            
Equity investments $ 501,436   $ 501,436   $ 440,068  
Loss (income) from equity method investments (69,569) (50,108) (198,044) (111,318)    
Tatex Thailand II, LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 23.50%   23.50%      
Equity investments               
Loss (income) from equity method investments 0 (205) 0 (205)    
Tatex Thailand III, LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 17.90%   17.90%      
Equity investments 12,238   12,238   10,774  
Loss (income) from equity method investments 121 75 170 93    
Grizzly Oil Sands ULC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 24.9999%   24.9999%      
Equity investments 203,351   203,351   191,473  
Loss (income) from equity method investments 2,228 731 4,229 1,263    
Bison Drilling And Field Services LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 40.00%   40.00%      
Equity investments 25,777   25,777   12,318  
Loss (income) from equity method investments (329) 171 1,604 23    
Muskie Holdings LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 25.00%   25.00%      
Equity investments 8,111   8,111   7,544  
Loss (income) from equity method investments (101) 375 433 816    
Timber Wolf Terminals LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 50.00%   50.00%      
Equity investments 1,001   1,001   1,001  
Loss (income) from equity method investments 0 0 0 8    
Windsor Midstream LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 22.50%   22.50%      
Equity investments 13,230   13,230   10,632  
Loss (income) from equity method investments (35) (474) (203) (858)    
Stingray Pressure Pumping LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 50.00%   50.00%      
Equity investments 17,769   17,769   19,624  
Loss (income) from equity method investments 1,630 319 2,143 (384)    
Stingray Cementing LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 50.00%   50.00%      
Equity investments 2,842   2,842   3,291  
Loss (income) from equity method investments 106 47 201 69    
Blackhawk Midstream LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 50.00%   50.00%      
Equity investments 0   0   0  
Loss (income) from equity method investments 0 83 (84,787) 122    
Stingray Logistics LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 50.00%   50.00%      
Equity investments 1,060   1,060   903  
Loss (income) from equity method investments (238) 28 (157) 54    
Diamondback Energy, Inc [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 4.70%   4.70%      
Equity investments 211,300   211,300   178,708 138,500
Loss (income) from equity method investments (72,945) (51,361) (121,712) (112,457)    
Stingray Energy Services LLC [Member]
           
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership percentage 50.00%   50.00%      
Equity investments 4,757   4,757   3,800  
Loss (income) from equity method investments $ (6) $ 103 $ 35 $ 138