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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Results of Operations from Oil and Natural Gas Producing Activities (Unaudited) (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        
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]        
Revenues $ 98,307   $ 356,210  
Expenses        
Production costs 27,640   116,372  
Depreciation and depletion 36,061   118,035  
Impairment 319,087   0  
Total expenses 382,788   234,407  
Income (loss) before income taxes (284,481)   121,803  
Income tax expense (benefit) (112,427)   47,722  
Results of operations for oil and natural gas producing activities (excluding corporate overhead and interest costs) $ (172,054)   $ 74,081  
Predecessor        
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]        
Revenues   $ 279,971   $ 707,434
Expenses        
Production costs   135,715   324,141
Depreciation and depletion   90,978   324,390
Impairment   657,392   4,473,787
Total expenses   884,085   5,122,318
Income (loss) before income taxes   (604,114)   (4,414,884)
Income tax expense (benefit)   (229,986)   (1,680,746)
Results of operations for oil and natural gas producing activities (excluding corporate overhead and interest costs)   $ (374,128)   $ (2,734,138)