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REVENUE - Revenue by Metal (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Disaggregation of Revenue [Line Items]    
Revenue $ 314,614 $ 355,446
Gold    
Disaggregation of Revenue [Line Items]    
Revenue 239,861 295,617
Silver    
Disaggregation of Revenue [Line Items]    
Revenue 49,115 33,965
Lead    
Disaggregation of Revenue [Line Items]    
Revenue 12,776 13,857
Zinc    
Disaggregation of Revenue [Line Items]    
Revenue 4,457 6,310
Other    
Disaggregation of Revenue [Line Items]    
Revenue $ 8,405 $ 5,697