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Summary of Accumulated Other Comprehensive Income (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance $ 147,476  
Ending Balance 199,020 $ 147,476
Unrealized Foreign Currency Translation Gains (Losses) [member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 545,637 579,070
Other comprehensive income (loss) 119,821 (33,433)
Ending Balance 665,458 545,637
Foreign Exchange Gain (Loss) on Net Investment Hedge [member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance (403,559) (424,754)
Other comprehensive income (loss) (69,027) 21,195
Ending Balance (472,586) (403,559)
Tax Benefit Related To Net Investment Hedge Of Long Term Debt [Member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 5,398 5,398
Other comprehensive income (loss) 750  
Ending Balance 6,148 5,398
Accumulated Other Comprehensive Income [Member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 147,476 159,714
Other comprehensive income (loss) 51,544 (12,238)
Ending Balance $ 199,020 $ 147,476