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 12 Months Ended
Oct. 31, 2016
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
a
Mar. 31, 2016
USD ($)
Dec. 31, 2014
entity
Sep. 30, 2014
a
Dec. 31, 2014
USD ($)
Feb. 29, 2016
Feb. 01, 2016
USD ($)
Schedule of Equity Method Investments [Line Items]                
(Income) loss from equity method investments   $ 4,907 $ 30,737          
Distributions from equity method investments   631 138          
Payments for equity method investments   $ 10,673 1,821          
IPO | Common Stock | Mammoth Energy Partners 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              
APICO, LLP | Tatex Thailand II, LLC                
Schedule of Equity Method Investments [Line Items]                
Ownership percentage   8.50%            
Tatex Thailand II, LLC                
Schedule of Equity Method Investments [Line Items]                
Equity method investment, ownership interest, percent   23.50%            
(Income) loss from equity method investments   $ (243) (159)          
Tatex Thailand III, LLC                
Schedule of Equity Method Investments [Line Items]                
Equity method investment, ownership interest, percent   17.90%            
(Income) loss from equity method investments   $ 0 0          
Grizzly Oil Sands ULC                
Schedule of Equity Method Investments [Line Items]                
Equity method investment, ownership interest, percent   24.9999%            
Gas and oil area, reserve (acres) | a   830            
(Income) loss from equity method investments   $ 365 23,685          
Other than temporary impairment loss     23,100          
Equity method investment, amount of cash calls, based on proportionate ownership interest   700            
Equity method investments, increase (decrease) due to foreign currency translation adjustment   $ 1,300 10,300          
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]                
Equity method investment, ownership interest, percent   22.50%            
(Income) loss from equity method investments   $ (311) (167)          
Distributions from equity method investments   $ 200 100          
Sturgeon Acquisitions LLC                
Schedule of Equity Method Investments [Line Items]                
Equity method investment, ownership interest, percent   25.00%            
(Income) loss from equity method investments   $ 68 377          
Payments for equity method investments           $ 20,700    
Mammoth Energy Services LP                
Schedule of Equity Method Investments [Line Items]                
Equity method investment, ownership interest, percent   24.20%   30.50%   30.50%    
Number of entities contributed for ownership interest | entity       4        
Equity method investments, increase (decrease) due to foreign currency translation adjustment   $ 100 (1,200)          
Shares received from equity method investee in exchange for ownership interest (in shares) | shares 9,150,000              
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 7,500,000              
Mammoth Energy Services LP | IPO | Common Stock | 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]                
Equity method investment, ownership interest, percent   25.00%            
(Income) loss from equity method investments   $ 2,541 $ 0          
Equity method investment, amount of cash calls, based on proportionate ownership interest   10,000            
Distributions from equity method investments   $ 400            
Strike Force Midstream LLC | Rice Energy Inc                
Schedule of Equity Method Investments [Line Items]                
Ownership percentage by parent             75.00%  
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, LLP                
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