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 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Oct. 11, 2012
Schedule of Equity Method Investments [Line Items]            
Equity investments and investments in subsidiaries $ 373,215   $ 373,215   $ 440,068  
(Income) loss from equity method investments 34,477 (51,322) (163,567) (162,640)    
Tatex Thailand II, LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 23.50%   23.50%      
Equity investments and investments in subsidiaries               
(Income) loss from equity method investments (475) (170) (475) (375)    
Tatex Thailand III, LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 17.90%   17.90%      
Equity investments and investments in subsidiaries 12,190   12,190   10,774  
(Income) loss from equity method investments 47 64 217 157    
Grizzly Oil Sands ULC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 24.9999%   24.9999%      
Equity investments and investments in subsidiaries 189,182   189,182   191,473  
(Income) loss from equity method investments 4,633 862 8,862 2,125    
Bison Drilling And Field Services LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 40.00%   40.00%      
Equity investments and investments in subsidiaries 28,950   28,950   12,318  
(Income) loss from equity method investments (1,273) 1,258 331 1,281    
Muskie Proppant LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 25.00%   25.00%      
Equity investments and investments in subsidiaries 8,056   8,056   7,544  
(Income) loss from equity method investments 55 53 488 869    
Timber Wolf Terminals LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 50.00%   50.00%      
Equity investments and investments in subsidiaries 995   995   1,001  
(Income) loss from equity method investments 7 0 7 8    
Windsor Midstream LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 22.50%   22.50%      
Equity investments and investments in subsidiaries 13,531   13,531   10,632  
(Income) loss from equity method investments (301) (14) (504) (872)    
Stingray Pressure Pumping LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 50.00%   50.00%      
Equity investments and investments in subsidiaries 20,040   20,040   19,624  
(Income) loss from equity method investments (351) (293) 1,792 (677)    
Stingray Cementing LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 50.00%   50.00%      
Equity investments and investments in subsidiaries 2,970   2,970   3,291  
(Income) loss from equity method investments (12) (31) 189 38    
Blackhawk Midstream LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 50.00%   50.00%      
Equity investments and investments in subsidiaries 0   0   0  
(Income) loss from equity method investments 0 174 (84,787) 296    
Stingray Logistics LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 50.00%   50.00%      
Equity investments and investments in subsidiaries 1,316   1,316   903  
(Income) loss from equity method investments (256) (78) (413) (24)    
Diamondback Energy, Inc [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 1.70%   1.70%      
Equity investments and investments in subsidiaries 70,443   70,443   178,708 138,500
(Income) loss from equity method investments 32,412 (52,945) (89,300) (165,402)    
Stingray Energy Services LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 50.00%   50.00%      
Equity investments and investments in subsidiaries 4,854   4,854   3,800  
(Income) loss from equity method investments (9) (202) 26 (64)    
Sturgeon Acquisitions LLC [Member]
            
Schedule of Equity Method Investments [Line Items]            
Approximate Ownership % 25.00%   25.00%      
Equity investments and investments in subsidiaries 20,688   20,688   0  
(Income) loss from equity method investments $ 0 $ 0 $ 0 $ 0