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ASSET RETIREMENT OBLIGATIONS - Asset Retirement Obligations (ARO) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]        
Asset retirement obligations   $ 16,215 $ 18,113 $ 13,745 $ 14,993
Less: Asset retirement obligations due within one year 2,576 4,550    
Long-term asset retirement obligations  $ 13,639 $ 13,563