Annual report pursuant to Section 13 and 15(d)

Equity Investments - Narrative (Details)

v3.20.4
Equity Investments - Narrative (Details)
a in Thousands
 12 Months Ended
Jul. 26, 2018
USD ($)
shares
Jun. 29, 2018
USD ($)
shares
Dec. 31, 2020
USD ($)
a
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
May 31, 2019
Schedule of Equity Method Investments [Line Items]              
Equity method investment, other than temporary impairment         $ 0    
Accumulated other comprehensive loss     $ 43,000,000 $ 46,833,000      
Proceeds from sale of equity method investments     0 0 226,487,000    
Income (loss) from equity method investments     (11,055,000) (210,289,000) 49,625,000    
Equity investments     $ 24,816,000 32,044,000      
Investment in Tatex Thailand II, LLC | Apico Llc              
Schedule of Equity Method Investments [Line Items]              
Equity investment, ownership interest             8.50%
Investment in Grizzly Oil Sands ULC | Athabasca Peace River And Cold Lake Oil Sands Regions              
Schedule of Equity Method Investments [Line Items]              
Gas and oil area, reserve (acres) | a     830        
Investment in Grizzly Oil Sands ULC              
Schedule of Equity Method Investments [Line Items]              
Equity investment, ownership interest     24.50%        
Equity method investment, other than temporary impairment     $ 0 32,400,000 0    
Amount of cash paid for equity investments     0 400,000      
Increase (decrease) due to foreign currency translation adjustment     4,200,000 9,000,000.0 $ (15,200,000)    
Accumulated other comprehensive loss     40,600,000 44,800,000      
Equity investments     $ 24,816,000 21,000,000      
Mammoth Energy Partners LP              
Schedule of Equity Method Investments [Line Items]              
Equity investment, ownership interest     21.50%   21.50%    
Equity method investment, other than temporary impairment     $ 0 160,800,000      
Increase (decrease) due to foreign currency translation adjustment       200,000   $ (400,000)  
Equity method investment, ownership (in shares) | shares 9,829,548   9,829,548        
Gain on sale of equity method investment         $ 28,300,000    
Quoted market value of equity method investment     $ 43,700,000 21,600,000      
Income (loss) from equity method investments     (10,600,000)        
Equity investments     $ 0 11,005,000      
Distributions from equity method investments       2,500,000      
Mammoth Energy Partners LP | Over-allotment option              
Schedule of Equity Method Investments [Line Items]              
Proceeds from sale of equity method investments $ 4,500,000 $ 47,000,000.0          
Mammoth Energy Partners LP | Common Stock | Over-allotment option              
Schedule of Equity Method Investments [Line Items]              
Shares issued in equity method investment transaction (in shares) | shares 118,974 1,235,600          
Investment in Tatex Thailand II, LLC              
Schedule of Equity Method Investments [Line Items]              
Equity investment, ownership interest     23.50%        
Equity investments     $ 0 0      
Distributions from equity method investments     $ 0 $ 2,100,000