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Assets Held for Sale - Disclosure of Detailed Information for Changes in the Carrying Amount of Derivative Liabilities (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Assets Held for Sale [Line Items]  
Balance - begging of period $ 63,993
Balance - end of period 77,699
Assets and liabilities classified as held for sale  
Assets Held for Sale [Line Items]  
Balance - end of period 39,986
Stream Arrangement | Assets and liabilities classified as held for sale  
Assets Held for Sale [Line Items]  
Balance - begging of period 0
Assumed in Premier Acquisition (note 5(a)) 40,369
Gold and silver delivered (6,802)
Change in fair value 6,419
Balance - end of period $ 39,986