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Corporate Transactions - Acquisition of Premier (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 16, 2021
Apr. 07, 2021
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about business combination [line items]        
Gain on bargain purchase of Premier (note 5(a))     $ 81,432 $ 0
Gain on bargain purchase related to mineral properties, plant, and equipment     94,400  
Gain on bargain purchase related to deferred tax liabilities     $ 13,000  
Greenstone Gold Mines LP        
Disclosure of detailed information about business combination [line items]        
Ownership interest in subsidiary 60.00% 50.00% 60.00%  
i-80 Gold Corp.        
Disclosure of detailed information about business combination [line items]        
Ownership interest in subsidiary   30.00%    
Premier        
Disclosure of detailed information about business combination [line items]        
Percentage of voting equity interests acquired   100.00%    
Business combination shares issued (in shares)   0.1967    
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination   $ 3,200    
Acquisition related costs       $ 800
Revenue of acquiree since acquisition date     $ 56,900  
Profit of acquiree since acquisition date     7,700  
Revenue of combined entity as if combination occurred at beginning of period     1,115,000  
Profit of combined entity as if combination occurred at beginning of period     $ 541,000  
Premier | Greenstone Gold Mines LP        
Disclosure of detailed information about business combination [line items]        
Ownership interest in subsidiary   50.00%    
Premier | i-80 Gold Corp.        
Disclosure of detailed information about business combination [line items]        
Ownership interest in subsidiary   30.00%