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Trade and Other Receivables (Schedule of Trade and Other Receivables) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of operating segments [line items] |  |
Trade receivables from concentrate sales | $ 26,309 | $ 33,642
Advances and other receivables | 4,108 | 2,419
Value added taxes recoverable | 8,890 | 11,646
Total accounts and other receivables | 76,555 | 47,707
Gains from securities trades | (17,897) | (20,582)
Lindero Reporting Segment [member] |  |
Disclosure of operating segments [line items] |  |
Value added taxes recoverable | 37,248 |
Unrealized foreign exchange loss | 12,365 | 12,137
Gains from securities trades | $ 3,306 | $ 11,204

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