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REVENUE - Revenue by Metal (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Disaggregation of Revenue [Line Items]        
Revenue $ 301,026 $ 319,583 $ 615,640 $ 675,029
Gold        
Disaggregation of Revenue [Line Items]        
Revenue 245,168 272,471 485,029 568,088
Silver        
Disaggregation of Revenue [Line Items]        
Revenue 40,932 38,739 90,047 72,703
Lead        
Disaggregation of Revenue [Line Items]        
Revenue 9,255 6,170 22,031 20,028
Zinc        
Disaggregation of Revenue [Line Items]        
Revenue 1,024 2,146 5,481 8,455
Other        
Disaggregation of Revenue [Line Items]        
Revenue $ 4,647 $ 57 $ 13,052 $ 5,755