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Investments in Associates - Summarized Financial Information in Associate 100% Basis and Adjustments (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of associates [line items]    
Depletion $ (59,780) $ (35,704)
Administration expenses (13,394) (10,198)
Other (expense) income 33 (68)
Company's share of net loss of associate (3,654) $ (943)
Sandbox Royalties Corp [member]    
Disclosure of associates [line items]    
Revenue 355  
Depletion (267)  
Administration expenses (272)  
Other (expense) income (1,341)  
Total net loss (1,525)  
Company's share of net loss of associate (307)  
Horizon Copper Corp [member]    
Disclosure of associates [line items]    
Revenue 0  
Administration expenses (666)  
Other (expense) income (5,582)  
Total net loss (6,248)  
Company's share of net loss of associate $ (2,124)