Income and Mining Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Income Tax Disclosure [Abstract]
Income and mining tax (expense) benefit	$ (93,238)	$ (62,595)	$ (195,192)	$ (81,008)
Income and mining tax (expense) benefit	43.30%	47.00%
Unrecognized tax benefits	$ 34,800		34,800		$ 34,400
Income-tax related interest and penalties	17,600		17,600		$ 15,300
Increase (decrease) income tax expense	10,400	$ (28,300)
Change in deferred tax asset, valuation allowance	0		(1,000)
Deferred tax asset, net of valuation allowance	$ 56,000		$ 56,000