Inventory and Ore on Leach Pads (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Inventory [Line Items]
Inventory, Finished Goods, Net of Reserves	$ 18,432	$ 3,507
Stockpile ore	356,918	85,450
Other Inventory, Net of Reserves	53,929	15,164
Inventory, Supplies, Net of Reserves	138,672	59,209
Inventory	567,951	163,330
Ore on Leach Pad, Current	160,433	157,461
Ore on leach pads, noncurrent	155,357	119,446
Inventory, Ore Stockpiles on Leach Pads, Gross	315,790	276,907
Long-term stockpile	237,872	42,076
Inventory and Ore on Leach Pads	1,121,613	482,313
Las Chispas
Inventory [Line Items]
Stockpile ore	79,300	73,600
Kensington
Inventory [Line Items]
Stockpile ore	10,000	2,300
Palmarejo
Inventory [Line Items]
Stockpile ore	2,500	1,100
Wharf
Inventory [Line Items]
Stockpile ore	1,700	8,400
New Afton
Inventory [Line Items]
Stockpile ore	19,300
Rainy River
Inventory [Line Items]
Stockpile ore	244,200
Long-term stockpile	195,800
Rochester
Inventory [Line Items]
Long-term stockpile	$ 42,100	$ 42,100

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Inventory and Ore on Leach Pads.

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Value of inventory stockpile classified as long-term.

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Ore on leach pad current.

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Ore on leach pad non current.

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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.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before last-in first-out (LIFO) and valuation reserves of ore stockpile material contained on a leach pad, for example, but not limited to, copper or gold ore.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

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Amount, after of valuation reserves and allowances, of inventory, classified as other, expected to be sold, or consumed within one year or operating cycle, if longer.

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