Contingencies - Additional Information (Details) - USD ($)		3 Months Ended			12 Months Ended		138 Months Ended	254 Months Ended
	Feb. 14, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2016	Mar. 31, 2023	Feb. 14, 2014	Dec. 31, 2022
Loss Contingencies [Line Items]
Loss contingency, Loss in period		$ 500,000	$ 700,000
Accrual for Environmental Loss Contingencies, Revision in Estimates					$ 2,000,000.0
Other current liabilities		27,016,000					$ 27,016,000		$ 26,380,000
Other liabilities		13,681,000					13,681,000		15,270,000
EPA Notice Letter [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Revision in Estimates		1,900,000
New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Financial assurance required to be provided to EPA to secure performance				$ 2,000,000
Expected insurance recoveries		6,200,000					6,200,000		$ 6,000,000.0
Insurance recovery reimbursements		900,000					900,000
Additional estimated insurance recoveries		1,100,000
New Almaden Mine (Formerly Referred to as Guadalupe River Watershed) [Member] | Natural Resource Damage Claim [Member]
Loss Contingencies [Line Items]
Total reserve		4,500,000					4,500,000
Other current liabilities		300,000					300,000
Other liabilities		4,200,000					4,200,000
Expense recognized		0	0
Revised estimated project total costs, Low Estimate						$ 3,300,000
Revised estimated project costs, High Estimate						$ 4,400,000
Original estimated project costs		9,000,000.0
Other Noncurrent Assets [Member] | New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Expected insurance recoveries		4,500,000					4,500,000
Accounts Receivable [Member] | New Idria Mercury Mine [Member]
Loss Contingencies [Line Items]
Expected insurance recoveries		1,700,000					1,700,000
Scepter Company [Member] | Ms.McCartney [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 30,000
Pending Litigation [Member] | New Idria Mercury Mine [Member] | EPA Notice Letter [Member]
Loss Contingencies [Line Items]
Expected insurance recoveries		7,100,000					7,100,000
Loss contingencies, payments							8,300,000
Insurance recoveries							2,900,000
Gain loss contingency		500,000	$ 700,000
Loss contingency, Loss in period							17,100,000	$ 1,600,000
Total reserve		10,700,000					10,700,000
Other current liabilities		3,900,000					3,900,000
Other liabilities		$ 6,800,000					$ 6,800,000