Additional Balance Sheet Detail and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		Dec. 31, 2025	Dec. 31, 2024
Supplemental Cash Flow Information [Abstract]
Accrued salaries and wages		$ 42,354	$ 31,151
Flow-through share premium received (including over-allotment)		0	853
Deferred revenue	[1]	683	42,863
Income and mining taxes		116,230	36,490
Royalty settlement	[2]	0	3,750
Deferred cash due 2026		4,829	0
Deferred cash due 2025		0	9,644
Accrued operating costs		12,506	6,577
Unrealized losses on derivatives		124	70
Taxes other than income and mining		17,465	5,491
Accrued interest payable		6,060	8,122
Operating lease liabilities		11,962	11,598
Accrued liabilities and other		$ 212,213	$ 156,609

[1] See Note 18 -- Commitments and Contingencies for additional details on deferred revenue liabilities. (2) See Note 13 -- Fair Value Measurements for additional details on Deferred Cash Due 2026.

[2] See Note 18 -- Commitments and Contingencies for additional details on the Kensington royalty settlement and wage and hour litigation settlement.