Contingencies - Schedule of Contingencies Reserve Balance (Parenthetical) (Details) - New Idria Mercury Mine [Member] - USD ($) $ in Thousands	Mar. 31, 2025		Dec. 31, 2024	Mar. 31, 2024	[1]	Dec. 31, 2023
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 11,719	[1]	$ 12,425	$ 12,315		$ 13,182
Estimated Insurance Recoveries	7,500
Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 5,300
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other Accrued Liabilities, Current
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 6,400
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent
Accounts Receivable [Member]
Loss Contingencies [Line Items]
Estimated Insurance Recoveries	$ 3,000
Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Estimated Insurance Recoveries	$ 4,500

[1] (1) As of March 31, 2025, Buckhorn has a total ending reserve balance of $11.7 million related to the New Idria Mine, of which $5.3 million is classified in Other current liabilities and $6.4 million in Other liabilities (long-term).