INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Stock-based compensation	$ 3,229	$ 1,989
Net operating losses	54,455	5,863
Foreign tax credits	35,630	39,748
Amortizable tax goodwill	41,249	37,672
Other tax attributes	10,871	1,784
Capital losses	8,673	1,853
Lease liability	9,805	1,067
Other	1,896	1,788
Total deferred tax assets	165,808	91,764
Valuation allowance	(86,747)	(44,656)
Net deferred tax assets	79,061	47,108
Deferred tax liabilities:
Mineral property basis	(1,117,909)	(123,482)
Equity method investments	(84,036)	0
Marketable securities	(6,941)	0
Lease right-of-use asset	(8,913)	(930)
Other	(793)	(836)
Total deferred tax liabilities	(1,218,592)	(125,248)
Total net deferred taxes	$ (1,139,531)	$ (78,140)