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Inventory and Ore on Leach Pads (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Inventory Disclosure [Abstract] |  |
Inventory, Finished Goods, Net of Reserves | $ 7,221 | $ 10,772
Other Inventory, Net of Reserves | 14,508 | 20,761
Inventory, Supplies, Net of Reserves | 35,749 | 34,746
Inventory | 57,478 | 66,279
Ore on Leach Pad, Current | 75,603 | 75,122
Ore on leach pads, noncurrent | 68,975 | 66,964
Inventory, Ore Stockpiles on Leach Pads, Gross | 144,578 | 142,086
Inventory and Ore on Leach Pads | $ 202,056 | $ 208,365

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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68049868&loc=d3e3927-108312 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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