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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Other Commitments [Line Items]      
Asset retirement obligation $ 10,922 $ 9,595 $ 13,687
Canyon Project      
Other Commitments [Line Items]      
Loss contingency, estimate of possible loss 17,580 21,040  
Asset retirement obligation $ 33,380 $ 42,910