Contingencies - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended				135 Months Ended	254 Months Ended
	Feb. 14, 2023	Mar. 31, 2023	Dec. 31, 2018	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2016	Dec. 31, 2022	Feb. 14, 2014
Loss Contingencies [Line Items]
Loss contingency, Loss in period				$ 1,400	$ 700	$ 500
Other current liabilities				26,380	19,628			$ 26,380
Other liabilities				15,270	13,086			15,270
Accrual for environmental loss contingencies revision in estimates						2,000
EPA Notice Letter [Member] | Scenario Forecast [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies revision in estimates		$ 1,900
New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Financial assurance required to be provided to EPA to secure performance			$ 2,000
Expected insurance recoveries				6,000				6,000
New Almaden Mine (Formerly Referred to as Guadalupe River Watershed) [Member] | Natural Resource Damage Claim [Member]
Loss Contingencies [Line Items]
Total reserve				4,500				4,500
Other current liabilities				300				300
Other liabilities				4,200				4,200
Expense recognized					0	0
Original estimated project costs				9,000
Revised estimated project costs, Low Estimate							$ 3,300
Revised estimated project costs, High Estimate							$ 4,400
Scepter Company [Member] | Ms.McCartney [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 30
Accounts Receivable [Member] | New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Expected insurance recoveries				2,800				2,800
Other long-term Member | New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Expected insurance recoveries				3,200				3,200
Selling, General and Administrative Expenses [Member] | New Almaden Mine (Formerly Referred to as Guadalupe River Watershed) [Member] | Natural Resource Damage Claim [Member]
Loss Contingencies [Line Items]
Loss contingency, Loss in period				3,000
Pending Litigation [Member] | New Idria Mercury Mine [Member] | EPA Notice Letter [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable, Proceeds								2,000
Loss contingency, Loss in period								15,500	$ 1,600
Expected insurance recoveries				6,000				6,000
Gain loss contingency				(1,600)	$ 700	$ 500
Loss contingencies, payments								5,600
Total reserve				11,900				11,900
Other current liabilities				3,000				3,000
Other liabilities				$ 8,900				$ 8,900