REVENUE - Revenue by Metal (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 443,798	$ 405,455	$ 1,025,576	$ 722,073
Gold
Disaggregation of Revenue [Line Items]
Revenue	317,865	302,742	717,994	530,820
Silver
Disaggregation of Revenue [Line Items]
Revenue	109,629	87,210	269,114	162,485
Lead
Disaggregation of Revenue [Line Items]
Revenue	8,261	11,430	17,895	22,481
Zinc
Disaggregation of Revenue [Line Items]
Revenue	1,401	1,511	2,545	1,878
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 6,642	$ 2,562	$ 18,028	$ 4,409

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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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details