Inventory and Ore on Leach Pads - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Inventory [Line Items]
Inventory Write-down	$ 31,249	$ 1,232	$ 31,249	$ 16,821
Rochester [Member]
Inventory [Line Items]
Inventory Write-down			6,000
Rochester [Member] | Amortization
Inventory [Line Items]
Inventory Write-down			700
Rochester [Member] | Cost of Sales
Inventory [Line Items]
Inventory Write-down			$ 5,300