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ASSET RETIREMENT OBLIGATIONS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Changes in the Company's asset retirement obligations      
Beginning asset retirement obligations $ 41,959    
Liabilities incurred during period 817    
Liabilities settled during period (323)    
Divestitures during period (1,449)    
Accretion expense 543 $ 500  
Ending asset retirement obligations 41,547    
Less: current asset retirement obligations [1] (282)    
Long-term asset retirement obligations $ 41,265   $ 41,689
[1] Included in accrued liabilities in the Company’s interim unaudited condensed consolidated balance sheet at March 31, 2022.