Quarterly report pursuant to Section 13 or 15(d)

Equity Investments (Narrative) (Details)

v3.2.0.727
Equity Investments (Narrative) (Details)
a in Thousands, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 12, 2014
USD ($)
shares
Jan. 28, 2014
USD ($)
Mar. 31, 2015
USD ($)
Sep. 30, 2014
USD ($)
shares
Jun. 30, 2014
shares
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
a
shares
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
shares
Dec. 31, 2012
Oct. 11, 2012
USD ($)
shares
Schedule of Equity Method Investments [Line Items]                            
Distributions received                 $ 4,612 $ 0        
Equity investments and investments in subsidiaries           $ 362,391     362,391   $ 369,581      
(Income) loss from equity method investments           $ 15,120   $ (69,569) (4,855) (198,044)        
Payments for equity method investments                 $ 8,267 39,162        
Apico Llc [Member]                            
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          
Gas and oil area, reserve (acres) | a                 243          
Tatex Thailand III, LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Gas and oil area, reserve (acres) | a                 245          
Recorded expense during period                 $ 200          
Ownership interest           17.90%     17.90%          
Equity investments and investments in subsidiaries           $ 0     $ 0          
(Income) loss from equity method investments           189   121 $ 189 170        
Grizzly Oil Sands ULC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Gas and oil area, reserve (acres) | a                 830          
Cash calls paid                 $ 8,300          
Increase (decrease) due to foreign currency translation adjustment           $ (3,200)   (6,800) $ 11,700 500        
Ownership interest           24.9999%     24.9999%          
Equity investments and investments in subsidiaries           $ 164,113     $ 164,113   180,218      
(Income) loss from equity method investments           $ 8,494   2,228 $ 12,636 4,229        
Windsor Midstream LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Ownership interest           22.50%     22.50%          
Distributions received                 $ 3,600          
Equity investments and investments in subsidiaries           $ 27,766     27,766   13,505      
(Income) loss from equity method investments           $ 881   (35) $ (17,906) (203)        
Windsor Midstream LLC [Member] | MidMar Gas LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Ownership interest                         28.40%  
Coronado Midstream [Member] | Windsor Midstream LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Proceeds from sale of interest in partnership unit     $ 600,000                      
Gain on sale on investment     $ 81,600                      
Blackhawk Midstream LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Ownership interest           48.50%     48.50%          
Equity investments and investments in subsidiaries           $ 0     $ 0   0      
(Income) loss from equity method investments           $ 0   0 $ (7,217) (84,787)        
Blackhawk Midstream LLC [Member] | Ohio Gathering Company, LLC and Ohio Condensate Company, LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Purchase price of sold equity interests   $ 190,000                        
Amount put in escrow   $ 14,300                        
Distributions received               84,800            
Proceeds from release of escrow deposits             $ 7,200              
Diamondback Energy, Inc [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Ownership interest           0.00%     0.00%          
Investment (shares) | shares                           7,914,036
Equity investments and investments in subsidiaries           $ 0     $ 0   $ 0     $ 138,500
Number of shares issued in transaction (shares) | shares 942,000     1,437,500 1,000,000             4,534,536    
Proceeds received from sale of stock $ 60,800     $ 197,600               $ 192,700    
(Income) loss from equity method investments           $ 0   (72,945) $ 0 (121,712)        
Sturgeon Acquisitions LLC [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Ownership interest           25.00%     25.00%   25.00%      
Distributions received                 $ 1,000          
Equity investments and investments in subsidiaries           $ 22,599     22,599   $ 22,507      
(Income) loss from equity method investments           $ (491)   0 $ (1,059) 0        
Payments for equity method investments                     $ 20,700      
Mammoth Energy Partners LP [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Ownership interest           30.50%     30.50%   30.50%      
Equity investments and investments in subsidiaries           $ 139,006     $ 139,006   $ 143,973      
(Income) loss from equity method investments           $ 5,624   $ 0 $ 7,996 $ 0        
Equity investment in Mammoth Energy Partners                     $ 143,500