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Inventory, net (Details 3) - Minera Yanacocha SRL and subsidiary [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of inventory net [Line Items] |  |  |
Opening balance | $ 7,076 | $ 5,272 | $ 5,881
Provision for impairment of materials and supplies | 1,887 | 2,896 | 3,104
Reversal of provision for impairment of materials and supplies | (1,448) | (1,092) | (3,713)
Ending balance | $ 7,515 | $ 7,076 | $ 5,272

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- Details
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