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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
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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

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