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Long-Term Debt - Additional Information (Details) - USD ($)
3 Months Ended 7 Months Ended
Feb. 10, 2017
Oct. 04, 2016
Mar. 31, 2018
Mar. 31, 2017
May 11, 2017
Oct. 02, 2021
Oct. 03, 2018
Dec. 31, 2017
Oct. 03, 2017
Debt Instrument                  
Gain on extinguishment of debt     $ 1,151,000 $ 0          
Common stock issued for debt     0 $ 268,779,000          
Revolving Credit Facility | First Lien Exit Facility                  
Debt Instrument                  
Maximum borrowing capacity   $ 425,000,000.0              
Cash collateral released $ 50,000,000.0                
Revolving Credit Facility | Credit Facility                  
Debt Instrument                  
Maximum borrowing capacity 600,000,000.0                
Borrowing base $ 425,000,000.0                
Percentage of proved reserves pledged as collateral 95.00%                
Total net leverage ratio (no greater than) 3.50                
Interest coverage ratio (no less than) 2.25                
Aggregate principal amount of default trigger $ 25,000,000.0                
Default trigger related to judgment liability $ 25,000,000.0                
Debt outstanding     0            
Outstanding letters of credit     6,700,000            
Commitment fee 0.50%                
Revolving Credit Facility | Credit Facility | Base Rate | Minimum                  
Debt Instrument                  
Basis spread on variable rate 2.00%                
Revolving Credit Facility | Credit Facility | Base Rate | Maximum                  
Debt Instrument                  
Basis spread on variable rate 3.00%                
Revolving Credit Facility | Credit Facility | LIBOR | Minimum                  
Debt Instrument                  
Basis spread on variable rate 3.00%                
Revolving Credit Facility | Credit Facility | LIBOR | Maximum                  
Debt Instrument                  
Basis spread on variable rate 4.00%                
Secured Notes | New Building Note                  
Debt Instrument                  
Debt outstanding     0         $ 37,502,000  
Face amount of debt instrument $ 35,000,000.0 35,000,000.0              
Fair Value   36,600,000              
Gain on extinguishment of debt     $ 1,200,000            
Annual interest rate                 6.00%
Interest costs paid-in-kind         $ 1,300,000        
Debt Instrument, Term of Interest Payments, Days Paid in Kind (after refinancing or repayment)         90 days        
Proceeds remitted to unsecured creditors   $ 26,800,000              
Forecast | Secured Notes | New Building Note                  
Debt Instrument                  
Annual interest rate           10.00% 8.00%