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REVENUES FROM MINING OPERATIONS AND TRADE RECEIVABLES (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) customer | Dec. 31, 2016 USD ($)
Disclosure of major customers |  |
Provisionally concentrate sales | $ 12,000 | $ 8,185
Revenues from mining operations: |  |
Gold | 2,140,890 | 2,049,871
Silver | 86,262 | 85,096
Zinc | 9,177 | 1,413
Copper | 6,275 | 1,852
Total revenues from mining operation | $ 2,242,604 | $ 2,138,232
Precious metals revenue form mining operations (as a percent) | 99.30% | 99.80%
Customers who contribute over 10% revenue |  |
Disclosure of major customers |  |
Number of clients who account for more than 10% of revenue | customer | 4 |
Percentage of entity revenue from mining operations | 78.10% |

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