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INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE - Equity Method Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |
Proceeds from Dividends Received | $ 4,851 | $ 2,525 |
Corporate Venture |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |
Ownership interest (as a percent) | 100.00% | 100.00% |
MSC |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |
Ownership interest (as a percent) | 49.00% | 49.00% |
Results of operations | $ 200 | $ 200 |
Proceeds from Dividends Received | 4,900 | $ 2,500 |
Dividend distribution received | $ 4,851 |  | $ 12,212

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