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RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 22, 2019
Oct. 21, 2019
Jan. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Related Party Transaction [Line Items]            
Long-term debt       $ 1,118,161   $ 944,843
Repurchases of common stock       $ 15,108 $ 22,195  
Common Stock            
Related Party Transaction [Line Items]            
Repurchases of common stock (in shares)       563,500 735,995  
Repurchases of common stock       $ 6 $ 7  
W Energy Partners LLC | Common Stock            
Related Party Transaction [Line Items]            
Repurchases of common stock (in shares)     400,000      
Repurchases of common stock     $ 11,100      
Series A Preferred Stock            
Related Party Transaction [Line Items]            
Liquidation preference   $ 75,000        
Number of shares issued in transaction (in shares) 10,947          
Purchase price $ 1,100          
Conversion cap 9.99%          
8.5% Second Lien Notes due 2023            
Related Party Transaction [Line Items]            
Long-term debt   200,000        
Notes exchanged   $ 70,800        
8.5% Second Lien Notes due 2023 | Revolving Credit Facility            
Related Party Transaction [Line Items]            
Amount of debt converted $ 1,000          
Debt conversion, converted instrument, shares issued (in shares) 10,947