EQUITY METHOD INVESTMENTS - Assets and Liabilities Associated with McEwen Copper (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Equity Investments
Current assets	$ 72,154	$ 52,661
Total assets	645,143	657,239
Current liabilities	(43,017)	(30,003)
Total liabilities	(159,934)	$ (154,819)
McEwen Copper Inc. | Balance including fair value increments
Equity Investments
Current assets	20,423
Total assets	466,165
Current liabilities	(21,938)
Total liabilities	(22,188)
McEwen Copper Inc. | Adjustments
Equity Investments
Total assets	262,494
McEwen Copper Inc. | Balance excluding fair value increments
Equity Investments
Current assets	20,423
Total assets	203,671
Current liabilities	(21,938)
Total liabilities	(22,188)
Minera Santa Cruz S.A. | Balance including fair value increments
Equity Investments
Current assets	118,721
Total assets	279,870
Current liabilities	(42,792)
Total liabilities	(78,291)
Minera Santa Cruz S.A. | Adjustments
Equity Investments
Current assets	1,005
Total assets	68,970
Total liabilities	654
Minera Santa Cruz S.A. | Balance excluding fair value increments
Equity Investments
Current assets	117,716
Total assets	210,900
Current liabilities	(42,792)
Total liabilities	$ (78,945)