Income and Mining Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Tax (expense) benefit	$ 34,958	$ 37,045	$ (11,129)
Unrecognized Tax Benefits	300	700	2,700
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	400	$ 1,100	$ 2,300
Minimum
Income Tax Contingency [Line Items]
Unrecognized income tax liability	500
Maximum
Income Tax Contingency [Line Items]
Unrecognized income tax liability	$ 1,000