Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Oct. 02, 2014
Business Acquisition [Line Items]
Inventory Write-down	$ 21,204,000	$ 31,249,000	$ 38,018,000	$ 31,249,000
Rochester [Member]
Business Acquisition [Line Items]
Inventory Write-down	24,200,000		43,200,000
Rochester [Member] | Cost of Sales
Business Acquisition [Line Items]
Inventory Write-down	21,200,000		38,000,000
Palmarejo gold production royalty
Business Acquisition [Line Items]
Aggregate deposit to be received										$ 22,000,000
Production to be sold, percent										50.00%
Price per ounce under agreement										$ 800
Kensington
Business Acquisition [Line Items]
Revenue liability	$ 15,373,000	$ 7,599,000	$ 15,373,000	$ 7,599,000	$ 25,012,000		$ 15,016,000	$ 15,004,000	$ 15,003,000
Kensington | December 2020 Prepayment [Member]
Business Acquisition [Line Items]
Revenue liability					$ 15,000,000	$ 15,000,000	$ 15,000,000