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Summary of Significant Accounting Policies - Summary of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Accrued Liabilities, Current [Abstract]    
Accrued drilling costs $ 18,811  
Accrued interest payable 14,328  
Accrued transportation costs 5,022  
Accrued employee compensation 3,841  
Accrued ad valorem taxes 5,021  
Accrued lease operating expenses 3,311  
Other 2,927  
Total accrued expenses $ 53,261  
Predecessor    
Accrued Liabilities, Current [Abstract]    
Accrued drilling costs   $ 5,874
Accrued interest payable   21,277
Accrued transportation costs   3,269
Accrued employee compensation   6,449
Accrued lease operating expenses   68
Asset retirement obligation – assets held for sale   4,557
Other   961
Total accrued expenses   $ 42,455