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INVENTORY (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of inventories [Abstract] |  |
Finished goods | $ 19,262 | $ 11,627
Stockpiled ore | 6,806 | 30,574
Leach pad inventory | 128,783 | 86,696
Materials and supplies | 27,730 | 26,018
Current inventories | 182,581 | 154,915
Non-current materials and supplies (note 8) | 3,973 | 1,811
Inventories | 186,554 | 156,726
Write-downs (reversals of write-downs) of inventories | (5,710) | 3,701
Inventory write-down | 7,250 | 15,376
Purchase obligations | $ 15,963 | $ 17,164

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- Definition A classification of current inventory representing the amount of goods that have completed the production process and are held for sale in the ordinary course of business. [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 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_c&doctype=Standard -URIDate 2017-03-09 + Details
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