Annual report pursuant to Section 13 and 15(d)

Equity Investments (Narrative) (Details)

v3.3.1.900
Equity Investments (Narrative) (Details)
a in Thousands
 1 Months Ended 3 Months Ended 4 Months Ended 12 Months Ended
Nov. 12, 2014
USD ($)
shares
Jan. 28, 2014
USD ($)
Mar. 31, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2014
USD ($)
shares
Dec. 31, 2015
USD ($)
a
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
shares
Nov. 30, 2014
Jul. 02, 2013
USD ($)
Oct. 11, 2012
USD ($)
shares
Oct. 05, 2012
USD ($)
Schedule of Equity Method Investments [Line Items]                        
Gas and oil area, reserve (acres) | a           243            
Aggregate gain (loss) from equity method investments           $ (106,093,000) $ 139,434,000 $ 213,058,000        
Payments for equity method investments           14,472,000 63,999,000 47,014,000        
Distributions received           4,914,000 0 1,276,000        
Carrying Value           242,393,000 369,581,000          
Gain (Loss) on Investments           $ 0 84,470,000 0        
Apico Llc                        
Schedule of Equity Method Investments [Line Items]                        
Equity shares owned by affiliate (shares) | shares           85,122            
Total shares owned of subaffiliate (shares) | shares           1,000,000            
Investment in Tatex Thailand II, LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ (189,000) 475,000 343,000        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest           $ 0 2,400,000          
Ownership interest           23.50%            
Carrying Value           $ 0 0          
Investment in Tatex Thailand III, LLC                        
Schedule of Equity Method Investments [Line Items]                        
Gas and oil area, reserve (acres) | a           245            
Equity method investment, other than temporary impairment             12,100,000          
Aggregate gain (loss) from equity method investments           $ 0 (12,408,000) (254,000)        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest             1,600,000          
Ownership interest           17.90%            
Carrying Value           $ 0 0          
Investment in Grizzly Oil Sands ULC                        
Schedule of Equity Method Investments [Line Items]                        
Gas and oil area, reserve (acres) | a           830            
Equity method investment, other than temporary impairment           $ 101,600,000            
Aggregate gain (loss) from equity method investments           (115,544,000) (13,159,000) (2,999,000)        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest           14,500,000 18,800,000          
Increase (decrease) due to foreign currency translation adjustment           $ 28,500,000 16,900,000 12,200,000        
Ownership interest           24.9999%            
Carrying Value           $ 50,645,000 180,218,000          
Investment in Bison Drilling and Field Services LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ 0 (213,000) (3,533,000)        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest             17,000,000          
Ownership interest           0.00%            
Carrying Value           $ 0 0          
Muskie Holdings LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ 0 (371,000) (1,975,000)        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest             1,000,000          
Loan receivable                   $ 900,000    
Ownership interest           0.00%            
Carrying Value           $ 0 0          
Investment in Timber Wolf Terminals LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           (14,000) (9,000) 6,000        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest           $ 0            
Ownership interest           50.00%            
Carrying Value           $ 999,000 1,013,000          
Investment in Windsor Midstream LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ 18,398,000 477,000 1,125,000        
Ownership interest           22.50%            
Distributions received           $ 3,900,000            
Carrying Value           $ 27,955,000 $ 13,505,000          
Coronado Midstream LLC | Investment in Windsor Midstream LLC                        
Schedule of Equity Method Investments [Line Items]                        
Ownership interest           28.40%            
Property, Plant and Equipment, Estimated Sale Price     $ 600,000,000                  
Coronado Midstream [Member] | Investment in Windsor Midstream LLC                        
Schedule of Equity Method Investments [Line Items]                        
Gain (Loss) on Sale of Equity Investments     $ 81,600,000                  
Stingray Pressure Pumping LLC                        
Schedule of Equity Method Investments [Line Items]                        
Business Acquisition, Period Results Included in Combined Entity             11 months          
Aggregate gain (loss) from equity method investments           $ 0 $ (2,027,000) 818,000        
Equity Method Investment, Amount of Cash Calls, Based on Proportionate Ownership Interest             2,500,000          
Ownership interest           0.00%            
Carrying Value           $ 0 0          
Investment in Blackhawk Midstream LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ 7,216,000 84,787,000 $ (673,000)        
Ownership interest           48.50%            
Net proceeds received from release of escrow           $ 7,200,000            
Carrying Value           0 $ 0          
Investment in Blackhawk Midstream LLC | Ohio Gathering Company, LLC and Ohio Condensate Company, LLC                        
Schedule of Equity Method Investments [Line Items]                        
Purchase price   $ 190,000,000                    
Amount put in escrow   14,300,000                    
Distributions received   $ 84,800,000                    
Diamondback Energy, Inc                        
Schedule of Equity Method Investments [Line Items]                        
Ownership interest             7.20%          
Investment (shares) | shares                     7,914,036  
Carrying Value                     $ 138,500,000  
Sale of stock, Number of shares issued in transaction | shares 942,000       2,437,500     4,534,536        
Sale of stock, consideration received $ 60,800,000       $ 197,600,000     $ 192,700,000        
Equity investment in Diamondback                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ 0 $ 79,654,000 220,129,000        
Ownership interest           0.00%     20.00%      
Carrying Value           $ 0 0          
Stingray Energy Services LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ (557,000) 88,000 215,000        
Ownership interest           50.00%            
Carrying Value           $ 5,908,000 5,718,000          
Investment in Sturgeon Acquisitions LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments           $ 1,229,000 1,819,000 0        
Payments for equity method investments       $ 20,700,000                
Ownership interest       25.00% 25.00% 25.00%            
Distributions received           $ 1,000,000            
Carrying Value           22,769,000 $ 22,507,000          
Mammoth Energy Partners LP                        
Schedule of Equity Method Investments [Line Items]                        
Business Acquisition, Period Results Included in Combined Entity             1 month          
Equity method investment, other than temporary impairment           0            
Aggregate gain (loss) from equity method investments           $ (16,485,000) $ 201,000 $ 0        
Ownership interest           30.50%            
Carrying Value           $ 131,630,000 143,973,000          
Equity Method Investments, Fair Value Disclosure             143,500,000          
Gain (Loss) on Investments             84,500,000          
Prime Rate | Muskie Holdings LLC                        
Schedule of Equity Method Investments [Line Items]                        
Loans receivable, basis spread on variable rate                   2.50%    
Income From Equity Method Investments | Investment in Tatex Thailand III, LLC                        
Schedule of Equity Method Investments [Line Items]                        
Aggregate gain (loss) from equity method investments             $ (12,100,000)          
Revolving Credit Facility                        
Schedule of Equity Method Investments [Line Items]                        
Long-term Line of Credit           14,400,000            
Revolving Credit Facility | Subsidiaries                        
Schedule of Equity Method Investments [Line Items]                        
Credit facility                       $ 125,000,000.0
Long-term Line of Credit           $ 57,400,000