Other, Net - Summary of Pre-development, reclamation and other (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Income and Expenses [Abstract]
Covid-19 Related Costs	$ 318	$ 972	$ 1,290	$ 5,319
Care and maintenance costs	4,754	6,447	10,913	13,368
Pre-development, reclamation, and other	9,178	12,738	20,590	26,450
Other Operating Income (Expense), Net	$ 577	$ 2,357	$ 1,395	$ 1,893