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DIVESTITURE - Additional Information (Details)
$ in Thousands
2 Months Ended
Feb. 27, 2017
USD ($)
Dec. 31, 2016
MMBoe
Feb. 28, 2017
USD ($)
Appalachia Properties | Disposal Group, Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net consideration received for sale of Appalachia Properties $ 522,472    
Predecessor      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Percentage of proved oil and natural gas reserves   34.00%  
Predecessor | Appalachia Properties | Disposal Group, Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net consideration received for sale of Appalachia Properties 522,500    
Gross proceeds from properties sold 527,000    
Purchase price adjustment $ 4,500    
Net gain on sale     $ 213,500
Predecessor | Oil and Gas Properties | Appalachia Properties | Disposal Group, Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Estimated proved oil and natural gas reserves | MMBoe   18