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Inventory and Ore on Leach Pads - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 7 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2020 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Inventory [Line Items] |  |  |  |  |
Inventory Write-down |  |  | $ 16,821 | $ 69,246 | $ 55,297
Silvertip [Member] |  |  |  |  |
Inventory [Line Items] |  |  |  |  |
Inventory Write-down | $ 10,400 | $ 3,300 |  |  |

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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314 + Details
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