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Stock-Based Compensation - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation capitalized due to rig construction activity $ 0 $ 0 $ 0 $ 0
Options, granted (in shares)     0 0
Options, exercisable (in shares) 33,458   33,458  
Remaining contractual life (years)     1 year 6 months  
Weighted-average exercise price (in dollars per share) $ 254.80   $ 254.80  
Restricted stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (years)     5 years  
Unrecognized compensation costs $ 1,700,000   $ 1,700,000  
Period for recognition     1 year 8 months 12 days  
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (years)     3 years  
Unrecognized compensation costs $ 1,200,000   $ 1,200,000  
Period for recognition     10 months 24 days  
Exercise price (in dollars per share) $ 0   $ 0  
Performance-based RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (years)     3 years  
Unrecognized compensation costs $ 300,000   $ 300,000  
Period for recognition     1 year  
Shares received per restricted stock unit (in shares) 2   2  
2019 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares) 275,000   275,000  
Number of shares available for future awards (in shares) 105,055   105,055