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Inventory and Ore on Leach Pads (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Inventory Disclosure [Abstract] |  |
Inventory, Finished Goods, Net of Reserves | $ 1,943 | $ 1,643
Other Inventory, Net of Reserves | 11,867 | 11,353
Inventory, Supplies, Net of Reserves | 39,134 | 38,285
Inventory | 52,944 | 51,281
Ore on Leach Pad, Current | 89,406 | 81,128
Ore on leach pads, noncurrent | 73,133 | 73,495
Inventory, Ore Stockpiles on Leach Pads, Gross | 162,539 | 154,623
Inventory and Ore on Leach Pads | 233,625 | 223,931
Long-Term Inventory Stockpile | $ 18,142 | $ 18,027

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