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REVENUE - Revenue by Metal (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 405,455	$ 184,841	$ 722,073	$ 415,075
Gold
Disaggregation of Revenue [Line Items]
Revenue	302,742	96,207	530,820	280,198
Silver
Disaggregation of Revenue [Line Items]
Revenue	87,210	69,276	162,485	108,610
Lead
Disaggregation of Revenue [Line Items]
Revenue	11,430	11,907	22,481	20,369
Zinc
Disaggregation of Revenue [Line Items]
Revenue	1,511	1,663	1,878	2,239
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 2,562	$ 5,788	$ 4,409	$ 3,659

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