EQUITY INVESTMENTS - Assets and Liabilities Associated with McEwen Copper (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Equity Investments
Current assets	$ 52,021	$ 52,661
Total assets	638,716	657,239
Current liabilities	(37,909)	(30,003)
Total liabilities	(156,208)	$ (154,819)
McEwen Copper Inc. | Balance excluding FV increments
Equity Investments
Current assets	65,374
Total assets	248,682
Current liabilities	(31,694)
Total liabilities	(31,969)
McEwen Copper Inc. | Adjustments
Equity Investments
Total assets	262,494
McEwen Copper Inc. | Balance including FV increments
Equity Investments
Current assets	65,374
Total assets	511,176
Current liabilities	(31,694)
Total liabilities	(31,969)
Minera Santa Cruz S.A. | Balance excluding FV increments
Equity Investments
Current assets	107,710
Total assets	201,995
Current liabilities	(45,171)
Total liabilities	(79,538)
Minera Santa Cruz S.A. | Adjustments
Equity Investments
Current assets	732
Total assets	70,166
Total liabilities	149
Minera Santa Cruz S.A. | Balance including FV increments
Equity Investments
Current assets	108,442
Total assets	272,161
Current liabilities	(45,171)
Total liabilities	$ (79,389)