Quarterly report pursuant to Section 13 or 15(d)

Equity Investments (Narrative) (Details)

v3.7.0.1
Equity Investments (Narrative) (Details)
$ / shares in Units, a in Thousands, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 05, 2017
USD ($)
$ / shares
shares
Oct. 31, 2016
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2014
entity
Sep. 30, 2014
a
Jun. 30, 2017
USD ($)
a
Jun. 30, 2016
USD ($)
Dec. 31, 2014
USD ($)
Feb. 17, 2017
$ / shares
Dec. 15, 2016
$ / shares
Feb. 29, 2016
USD ($)
Mar. 31, 2015
Schedule of Equity Method Investments [Line Items]                            
Income (loss) from equity method investments and investments in subsidiaries     $ (13,301) $ (836)       $ (18,208) $ (31,573)          
Distributions from equity method investments               1,429 4,658          
Payments for equity method investments               24,151 16,690          
Share price (in dollars per share) | $ / shares                     $ 19.48 $ 20.96    
IPO | Common Stock | Mammoth Energy Services LP                            
Schedule of Equity Method Investments [Line Items]                            
Number of shares sold by Mammoth Energy (in shares) | shares   7,750,000                        
Shares issued, price per share (in dollars per share) | $ / shares   $ 15.00                        
Mammoth Energy Partners LP | IPO | Common Stock                            
Schedule of Equity Method Investments [Line Items]                            
Equity method investment (in shares) | shares   76,250                        
Proceeds from sale of equity   $ 1,100                        
Tatex Thailand II, LLC                            
Schedule of Equity Method Investments [Line Items]                            
Income (loss) from equity method investments and investments in subsidiaries     $ 211 0       $ 454 159          
Equity method investment, ownership interest, percent     23.50%         23.50%            
Tatex Thailand III, LLC                            
Schedule of Equity Method Investments [Line Items]                            
Income (loss) from equity method investments and investments in subsidiaries     $ 0 0       $ 0 0          
Equity method investment, ownership interest, percent     17.90%         17.90%            
Grizzly Oil Sands ULC                            
Schedule of Equity Method Investments [Line Items]                            
Gas and oil area, reserve (acres) | a               830            
Income (loss) from equity method investments and investments in subsidiaries     $ (208) (763)       $ (573) (24,448)          
Other than temporary impairment loss         $ 23,100                  
Equity method investment, amount of cash calls, based on proportionate ownership interest               1,200            
Equity method investments, increase (decrease) due to foreign currency translation adjustment     $ 4,500 (600)       $ 5,800 9,700          
Equity method investment, ownership interest, percent     24.9999%         24.9999%            
Grizzly Oil Sands ULC | Level 3                            
Schedule of Equity Method Investments [Line Items]                            
Equity method investments, fair value of minority interest         $ 39,100                  
Windsor Midstream LLC                            
Schedule of Equity Method Investments [Line Items]                            
Income (loss) from equity method investments and investments in subsidiaries     $ (25,545) 2,881       $ (25,234) 3,048          
Equity method investment, ownership interest, percent     22.50%         22.50%            
Loss from equity method investment, net of related out-of-pocket activity               $ (23,400)            
Distributions from equity method investments               200 4,900          
Coronado Midstream LLC | Windsor Midstream LLC                            
Schedule of Equity Method Investments [Line Items]                            
Equity method investment, ownership interest, percent                           28.40%
Sturgeon Acquisitions LLC                            
Schedule of Equity Method Investments [Line Items]                            
Income (loss) from equity method investments and investments in subsidiaries     $ 139 (134)       $ 71 (511)          
Equity method investment, ownership interest, percent     0.00%     25.00%   0.00%   25.00%        
Payments for equity method investments                   $ 20,700        
Gain on sale of equity method investments $ 12,500                          
Mammoth Energy Services LP                            
Schedule of Equity Method Investments [Line Items]                            
Equity method investments, increase (decrease) due to foreign currency translation adjustment     $ 20 (100)       $ 100 (1,300)          
Equity method investment, ownership interest, percent 25.10%         30.50%       30.50%        
Number of entities contributed for ownership interest | entity           4                
Shares received from equity method investee in exchange for ownership interest (in shares) | shares 2,000,000 9,150,000                        
Share price (in dollars per share) | $ / shares $ 18.50                          
Mammoth Energy Services LP | IPO | Common Stock | Mammoth Energy Services LP                            
Schedule of Equity Method Investments [Line Items]                            
Number of shares sold by Mammoth Energy (in shares) | shares   7,500,000                        
Mammoth Energy Services LP | IPO | Common Stock | Certain selling stockholders                            
Schedule of Equity Method Investments [Line Items]                            
Number of shares sold by Mammoth Energy (in shares) | shares   250,000                        
Strike Force Midstream LLC                            
Schedule of Equity Method Investments [Line Items]                            
Income (loss) from equity method investments and investments in subsidiaries     $ 83 $ (59)       (2,458) (59)          
Equity method investment, amount of cash calls, based on proportionate ownership interest               $ 23,000            
Equity method investment, ownership interest, percent     25.00%         25.00%            
Distributions from equity method investments               $ 1,200 $ 3,000          
Strike Force Midstream LLC | Level 3                            
Schedule of Equity Method Investments [Line Items]                            
Equity method investments, fair value of minority interest                         $ 22,500  
Phu Horm Field | Apico Llc                            
Schedule of Equity Method Investments [Line Items]                            
Gas and oil area, reserve (acres) | a               180            
Concession Acreage in Southeast Asia | Tatex Thailand III, LLC                            
Schedule of Equity Method Investments [Line Items]                            
Gas and oil area, reserve (acres) | a             245              
Apico Llc | Tatex Thailand II, LLC                            
Schedule of Equity Method Investments [Line Items]                            
Ownership percentage     8.50%         8.50%            
Strike Force Midstream LLC | Rice Energy Inc                            
Schedule of Equity Method Investments [Line Items]                            
Ownership percentage by parent                         75.00%