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Asset Retirement Obligations - Reconciliation of Beginning and Ending Aggregate Carrying Amounts of Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2016
Oct. 01, 2016
Dec. 31, 2017
Dec. 31, 2015
Successor        
Asset Retirement Obligation, Roll Forward Analysis        
Beginning balance $ 92,413   $ 106,481  
Liability incurred upon acquiring and drilling wells 121   1,336  
Revisions in estimated cash flows 12,397   (28,565)  
Liability settled or disposed in current period (540)   (11,308)  
Accretion 2,090   9,600  
Impact of fresh start accounting 0   0  
Ending balance 106,481 $ 92,413 77,544  
Less: current portion 66,154   41,017  
Asset retirement obligations, net of current 40,327   $ 36,527  
Predecessor        
Asset Retirement Obligation, Roll Forward Analysis        
Beginning balance $ 92,413 103,578   $ 54,402
Liability incurred upon acquiring and drilling wells   505   1,662
Revisions in estimated cash flows   0   44,060
Liability settled or disposed in current period   (36,979)   (1,023)
Accretion   4,365   4,477
Impact of fresh start accounting   20,944   0
Ending balance   92,413   103,578
Less: current portion   65,678   8,399
Asset retirement obligations, net of current   26,735   $ 95,179
Predecessor | WTO Properties        
Asset Retirement Obligation, Roll Forward Analysis        
Liability settled or disposed in current period   $ (34,100)