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EQUITY METHOD INVESTMENTS - Changes in Company's Investment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Change in the investment in MSC
Investment, beginning of period			$ 298,947
Income tax recovery	$ 1,111	$ 2,376	2,190	$ 4,933
Dividend distribution received			(2,246)
Investment, end of period	283,391		283,391		$ 298,947
McEwen Copper
Change in the investment in MSC
Investment, beginning of period			298,947	326,147	326,147
Additional investment in McEwen Copper					14,000
Dilution gain					5,777
Attributable net income (loss)			(15,556)		(46,977)
Investment, end of period	283,391		283,391		298,947
Minera Santa Cruz S.A.
Change in the investment in MSC
Investment, beginning of period			101,854	$ 93,218	93,218
Attributable net income (loss)			5,182		12,072
Amortization of fair value increments			(1,091)		(3,088)
Income tax recovery			15		37
Dividend distribution received			(2,246)		(385)
Investment, end of period	$ 103,714		$ 103,714		$ 101,854

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The dilution gain associated with the equity method investment.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee, before amortization, to which the equity method of accounting is applied.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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