EQUITY METHOD INVESTMENTS - A summary of the operating results of Minera Santa Cruz S.A. (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
EQUITY METHOD INVESTMENTS
Revenue from gold and silver sales	$ 35,696	$ 41,228
Depreciation and depletion	(6,021)	(10,107)
Loss before income and mining taxes	(7,349)	(22,940)
Income tax recovery	1,079	2,557
Income from investment in MSC, net of amortization	$ (8,068)	$ (16,734)
Minera Santa Cruz S.A.
EQUITY METHOD INVESTMENTS
Subsidiary (as a percent)	100.00%	100.00%
Revenue from gold and silver sales	$ 71,903	$ 65,927
Production costs applicable to sales	(56,588)	(47,884)
Depreciation and depletion	(10,610)	(8,926)
Gross profit	4,705	9,117
Exploration	(2,300)	(2,104)
Other income	826	1,501
Loss before income and mining taxes	3,231	8,514
Current and deferred tax	(1,039)	(4,847)
Net (loss) income and comprehensive (loss) income attributable to McEwen shareholders	2,192	3,667
Net income	1,073	1,796
Amortization of fair value increments	(568)	(709)
Income tax recovery	5	191
Income from investment in MSC, net of amortization	$ 510	$ 1,278