v3.26.1
Mineral Stream Interests - Additional Information (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Jun. 30, 2026
Jun. 16, 2026
Apr. 01, 2026
Feb. 16, 2026
Dec. 31, 2025
Aug. 08, 2012
Disclosure Of Mineral Stream Interests [line items]              
Upfront cash consideration paid   $ 46,352 [1]       $ 46,352 [1] $ 455,000
Upfront cash consideration to be paid [1],[2]   322,000       $ 322,000  
Total contractual obligations   4,622,997          
BHP Antamina PMPA [Member]              
Disclosure Of Mineral Stream Interests [line items]              
Upfront cash consideration paid       $ 4,300,000      
Jervois PMPA [Member]              
Disclosure Of Mineral Stream Interests [line items]              
Upfront cash consideration paid     $ 16,000        
Upfront cash consideration to be paid $ 16,000            
Silver [member] | BHP Antamina PMPA [Member]              
Disclosure Of Mineral Stream Interests [line items]              
Percentage of production to be purchased       67.50% 33.75%    
Silver [member] | Glencore Antamina Pmpa [Member]              
Disclosure Of Mineral Stream Interests [line items]              
Percentage of production to be purchased       33.75%      
Gold And Silver [Member] | Jervois PMPA [Member]              
Disclosure Of Mineral Stream Interests [line items]              
Upfront cash consideration to be paid   275,000          
Total contractual obligations   $ 243,000          
[1] Expressed in thousands of United States dollars; excludes closing costs and capitalized interest, where applicable.
[2] Please refer to Note 24 for details of when the remaining upfront consideration to be paid becomes due.