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INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE - Changes in Company's Investment in MSC (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in the investment in MSC      
Investment in MSC, beginning of period $ 108,326    
Income tax recovery 7,315 $ 1,390 $ 3,844
Dividend distribution received (9,832) (340) (8,877)
Investment in MSC, end of period 90,961 108,326  
Minera Santa Cruz S.A. [Member]      
Change in the investment in MSC      
Investment in MSC, beginning of period 108,326 110,183  
Attributable net income from MSC 132 2,745  
Amortization of fair value increments 8,331 5,390  
Income tax recovery (666) (1,128)  
Dividend distribution received (9,832) (340)  
Investment in MSC, end of period $ 90,961 $ 108,326 $ 110,183