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ASSET RETIREMENT OBLIGATIONS - Changes in Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
1 Months Ended 2 Months Ended 3 Months Ended
Feb. 28, 2017
Mar. 31, 2017
Feb. 28, 2017
Mar. 31, 2016
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]        
Liabilities settled   $ (17,600)    
Accretion expense   2,901    
Asset retirement obligations ending balance   275,400    
Predecessor        
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]        
Asset retirement obligations beginning balance   $ 235,200 $ 242,000  
Liabilities settled     (3,600)  
Divestment of properties     (8,700)  
Accretion expense     5,447 $ 9,983
Fair value fresh start adjustment $ 54,900      
Asset retirement obligations ending balance $ 235,200   $ 235,200