EQUITY INVESTMENTS - A summary of the operating results of Minera Santa Cruz S.A. (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Revenue from gold and silver sales	$ 58,680	$ 38,404	$ 34,395	$ 34,752	$ 28,240	$ 25,988	$ 30,647	$ 25,542	$ 166,231	$ 110,417	$ 136,541
Depreciation and depletion									(29,221)	(19,701)	(23,798)
Net income (loss) before tax									67,036	(80,288)	(64,199)
Net Income (Loss)	$ 138,453	$ (18,451)	$ (21,627)	$ (43,076)	$ (37,364)	$ (9,976)	$ (14,409)	$ (19,326)	55,299	(81,075)	(56,712)
Income tax recovery									(33,859)	(5,806)	7,315
Income (loss) from investment in MSC, net of amortization									$ (57,759)	$ 2,776	$ (7,533)
Minera Santa Cruz S.A.
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Subsidiary (as a percent)									100.00%	100.00%	100.00%
Revenue from gold and silver sales									$ 254,926	$ 254,698	$ 271,863
Production costs applicable to sales									(177,234)	(182,195)	(196,033)
Depreciation and depletion									(58,935)	(32,200)	(39,948)
Gross profit									18,757	40,303	35,882
Exploration									(9,346)	(8,946)	(10,602)
Other expenses									(3,977)	(19,715)	(17,077)
Net income (loss) before tax									5,434	11,642	8,203
Current and deferred tax recovery (expense)									3,051	1,221	(7,934)
Net Income (Loss)									$ 8,485	$ 12,863	$ 269
Subsidiary ownership interest (as a percent)	49.00%				49.00%				49.00%	49.00%	49.00%
Net loss									$ 4,157	$ 6,303	$ 132
Amortization of fair value increments									(4,612)	(4,155)	(8,331)
Income tax recovery									517	628	666
Income (loss) from investment in MSC, net of amortization									$ 62	$ 2,776	$ (7,533)