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Long-Term Debt - Additional Information (Details) - USD ($)
shares in Millions
1 Months Ended 3 Months Ended 4 Months Ended 7 Months Ended 9 Months Ended
Feb. 10, 2017
Oct. 04, 2016
Feb. 09, 2017
Dec. 31, 2016
Feb. 09, 2017
May 11, 2017
Sep. 30, 2017
Oct. 02, 2021
Oct. 03, 2018
Oct. 03, 2017
Secured Notes | New Building Note                    
Debt Instrument                    
Debt Instrument, Term of Interest Payments, Days Paid in Kind (after refinancing or repayment)           90 days        
Successor                    
Debt Instrument                    
Common stock issued for debt             $ 268,779,000      
Successor | Revolving Credit Facility | First Lien Exit Facility                    
Debt Instrument                    
Maximum borrowing capacity   $ 425,000,000.0                
Cash collateral released $ 50,000,000.0                  
Commitment fee   0.50%                
Successor | Revolving Credit Facility | First Lien Exit Facility | Base Rate                    
Debt Instrument                    
Basis spread on variable rate   3.75%                
Successor | Revolving Credit Facility | First Lien Exit Facility | LIBOR                    
Debt Instrument                    
Basis spread on variable rate   4.75%                
Basis spread on variable rate floor   1.00%                
Successor | 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      
Commitment fee 0.50%                  
Successor | Revolving Credit Facility | Credit Facility | Base Rate | Minimum                    
Debt Instrument                    
Basis spread on variable rate 2.00%                  
Successor | Revolving Credit Facility | Credit Facility | Base Rate | Maximum                    
Debt Instrument                    
Basis spread on variable rate 3.00%                  
Successor | Revolving Credit Facility | Credit Facility | LIBOR | Minimum                    
Debt Instrument                    
Basis spread on variable rate 3.00%                  
Successor | Revolving Credit Facility | Credit Facility | LIBOR | Maximum                    
Debt Instrument                    
Basis spread on variable rate 4.00%                  
Successor | Line of Credit                    
Debt Instrument                    
Outstanding letters of credit             7,100,000      
Successor | Convertible Debt | Convertible Notes                    
Debt Instrument                    
Debt outstanding       $ 268,780,000     $ 0      
Face amount of debt instrument   $ 281,800,000                
Fair Value   445,700,000                
Unamortized premium   $ 163,900,000                
Conversion ratio for shares issuable per $1.00 in principal   0.05330841                
Common stock issued for debt     $ 5,100,000 $ 13,000,000.0            
Common stock issued for debt (in shares) 14.1 15.0 0.3 0.7 1.0          
Notes exchanged/converted $ 263,700,000                  
Long-term debt, fixed interest rate             0.00%      
Successor | Secured Notes | New Building Note                    
Debt Instrument                    
Debt outstanding       $ 36,528,000     $ 37,601,000      
Face amount of debt instrument   $ 35,000,000.0         $ 35,000,000.0      
Fair Value   36,600,000                
Proceeds remitted to unsecured creditors   $ 26,800,000                
Forecast | Secured Notes | New Building Note                    
Debt Instrument                    
Annual interest rate               10.00% 8.00% 6.00%