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Inventory and Ore on Leach Pads (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Inventory Disclosure [Abstract] |  |
Inventory, Finished Goods, Net of Reserves | $ 2,100 | $ 2,909
Other Inventory, Net of Reserves | 16,573 | 14,788
Inventory, Supplies, Net of Reserves | 34,918 | 33,513
Inventory | 53,591 | 51,210
Ore on Leach Pad, Current | 78,689 | 74,866
Ore on leach pads, noncurrent | 87,723 | 81,963
Inventory, Ore Stockpiles on Leach Pads, Gross | 166,412 | 156,829
Inventory and Ore on Leach Pads | 230,762 | 213,703
Long-Term Inventory Stockpile | $ 10,759 | $ 5,664

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- Definition Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.BB) -URI http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729 Reference 2: 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)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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