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REVENUE - Narrative (Details) - Concentrate Metal Sales Agreement oz in Millions, lb in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) $ / pound $ / ounce	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) lb oz $ / pound $ / ounce	Sep. 30, 2023 USD ($)
Disaggregation of Revenue [Line Items]
Embedded derivative, increase of value | $	$ 3.2	$ 0.3	$ 6.4	$ 11.9
Silver
Disaggregation of Revenue [Line Items]
Notional ounce/pound | oz			5.6
Average price per ounce/pound (in dollars per ounce/pound) | $ / ounce	29.58		29.58
Lead
Disaggregation of Revenue [Line Items]
Notional ounce/pound | lb			28.0
Average price per ounce/pound (in dollars per ounce/pound) | $ / pound	0.95		0.95
Zinc
Disaggregation of Revenue [Line Items]
Notional ounce/pound | lb			2.0
Average price per ounce/pound (in dollars per ounce/pound) | $ / pound	1.28		1.28

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