Income and Mining Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Operating loss carryforwards, domestic	$ 623,100,000
Operating loss carryforwards, state and local	$ 465,600,000
Expiration term	20 years
Operating loss carryforwards subject to expiration	$ 318,500,000
Operating loss carryforwards not subject to expiration	304,600,000
Unrecognized tax benefits	2,000	$ 4,000	$ 300,000
Unrecognized income tax liability	100,000
Income-tax related interest and penalties	0	0	400,000
Tax (expense) benefit	$ 35,156,000	$ 14,658,000	$ 34,958,000