Income and Mining Taxes - Income and Mining Tax (Expense) Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Examination [Line Items]
Income and mining tax (expense) benefit	$ (96,666)	$ (67,450)	$ (35,156)
United States
Income Tax Examination [Line Items]
Current Federal Tax Expense (Benefit)	(637)	(145)	981
Deferred Federal Income Tax Expense (Benefit)	138,893	149	305
United States — State mining taxes
Income Tax Examination [Line Items]
Current Federal Tax Expense (Benefit)	(33,269)	(11,256)	(7,047)
Deferred Federal Income Tax Expense (Benefit)	3,479	(1,778)	(1,076)
United States — Foreign withholding tax
Income Tax Examination [Line Items]
Current Federal Tax Expense (Benefit)	(22)	(33)	(119)
Canada
Income Tax Examination [Line Items]
Current Foreign Tax Expense (Benefit)	(5,169)	(1,147)	(848)
Deferred Foreign Income Tax Expense (Benefit)	(4,798)	(376)	0
Mexico
Income Tax Examination [Line Items]
Current Foreign Tax Expense (Benefit)	(215,872)	(63,604)	(30,222)
Deferred Foreign Income Tax Expense (Benefit)	$ 20,729	$ 10,740	$ 2,870