Income and Mining Taxes - Valuation Allowance (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Examination [Line Items]
Valuation allowance	$ 444,989	$ 430,053
United States
Income Tax Examination [Line Items]
Valuation allowance	245,899	228,942
Canada
Income Tax Examination [Line Items]
Valuation allowance	178,310	165,561
Mexico
Income Tax Examination [Line Items]
Valuation allowance	441	13,277
New Zealand
Income Tax Examination [Line Items]
Valuation allowance	19,993	21,822
Other jurisdictions
Income Tax Examination [Line Items]
Valuation allowance	$ 346	$ 451