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Long-Term Debt - Additional Information (Details)
shares in Millions
1 Months Ended 3 Months Ended 4 Months Ended 7 Months Ended
Feb. 10, 2017
USD ($)
shares
Oct. 04, 2016
USD ($)
shares
Feb. 09, 2017
USD ($)
shares
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
shares
Mar. 31, 2016
USD ($)
Feb. 09, 2017
shares
May 11, 2017
Oct. 02, 2021
Oct. 03, 2018
Oct. 03, 2017
Convertible Debt | Convertible Notes                      
Debt Instrument                      
Debt outstanding       $ 0 $ 268,780,000            
Secured Notes | New Building Note                      
Debt Instrument                      
Debt outstanding       37,516,000 36,528,000            
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                  
Cash collateral released $ 50,000,000                    
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                    
Borrowing base $ 425,000,000                    
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                    
Default trigger related to judgment liability $ 25,000,000                    
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       $ 8,000,000              
Successor | Convertible Debt | Convertible Notes                      
Debt Instrument                      
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                  
Number of shares issuable under convertible securities | shares   15.0                  
Common stock issued for debt     $ 5,100,000   $ 13,000,000            
Common stock issued for debt (in shares) | shares 14.1   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                      
Face amount of debt instrument   $ 35,000,000   $ 35,000,000              
Fair Value   36,600,000                  
Proceeds from issuance of debt   $ 26,800,000                  
Forecast | Secured Notes | New Building Note                      
Debt Instrument                      
Annual interest rate                 10.00% 8.00% 6.00%
Debt Instrument, Term of Interest Payments, Days Paid in Kind (after refinancing or repayment)               90 days      
Predecessor                      
Debt Instrument                      
Common stock issued for debt           $ 4,409,000          
Predecessor | Convertible Debt | 8.125% Convertible Senior Notes due 2022                      
Debt Instrument                      
Long-term debt, fixed interest rate   8.125%       8.125%          
Predecessor | Convertible Debt | 7.5% Convertible Senior Notes due 2023                      
Debt Instrument                      
Long-term debt, fixed interest rate   7.50%       7.50%          
Predecessor | Secured Notes | 8.75% Senior Secured Notes                      
Debt Instrument                      
Long-term debt, fixed interest rate   8.75%                  
Predecessor | Senior Notes | 7.5% Senior Notes due 2021                      
Debt Instrument                      
Long-term debt, fixed interest rate   7.50%