MARKETABLE SECURITIES - Narrative (Details) - USD ($) $ in Thousands	Mar. 27, 2026	Feb. 26, 2026	Mar. 31, 2026	Dec. 31, 2025	Oct. 20, 2025
Debt Securities, Available-for-Sale [Line Items]
Available-for-sale equity securities			$ 97,114	$ 120,814
Bear Creek | Mercedes Mine
Debt Securities, Available-for-Sale [Line Items]
Net smelter return, unsecured percentage		2.00%
Bear Creek | Corani Project
Debt Securities, Available-for-Sale [Line Items]
Proceeds from debt settlement		$ 6,200
Net smelter return, incremental percentage		1.75%
Net smelter return (NSR) percentage		2.75%
Bear Creek Convertible Debenture | Convertible Debt | Bear Creek
Debt Securities, Available-for-Sale [Line Items]
Settled debt obligations		$ 49,500
Entree Resources Ltd.
Debt Securities, Available-for-Sale [Line Items]
Investment owned, balance (in shares)					50,297,717
Equity ownership percentage					24.00%
Available-for-sale equity securities			$ 83,400	$ 76,700
Highlander Silver Corp
Debt Securities, Available-for-Sale [Line Items]
Conversion ratio		11.75%
Gain on sale of marketable securities	$ 9,900