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Stockpiles and ore on leach pads, net (Details) - Minera Yanacocha SRL and subsidiary [Member] - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current portion - |  |
Stockpiles | $ 77,296 | $ 92,309
Current ore on leach pads | 159,930 | 209,471
Provision for net realizable value adjustment | (40,588) | (75,423)
Current ore stockpiles | 196,638 | 226,357
Non-current portion - |  |
Stockpiles | 32,362 | 41,997
Ore on leach pads | 50,350 | 78,843
Provision for net realizable value adjustment | (21,952) | (8,951)
Non-current ore stockpiles | $ 60,760 | $ 111,889

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- Definition A classification of current inventory representing the amount of ore stockpiles. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2017-01-01 -Paragraph 37 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2017-03-01&anchor=para_37&doctype=Standard -URIDate 2017-03-09 + Details
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