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INCOME AND MINING TAXES - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Income Tax Disclosure [Abstract]        
Effective income tax rate reconciliation, rate (as a percent)   (8.80%) 7.10%  
Deferred income tax expense   $ 68,900,000    
Effective income tax rate reconciliation, statutory rate (as a percent)   27.00%    
Unrecognized tax benefits that would impact effective tax rate $ 0 $ 0   $ 8,600,000
Unrecognized tax benefits, income tax penalties and interest accrued 0 0   $ 5,200,000
Unrecognized tax benefits, release of income tax penalties and interest expense   (7,200,000)    
Unrecognized tax benefits, cash settlement $ 1,400,000 $ 1,356,000 $ 0