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Summary of Accumulated Other Comprehensive Income (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance $ 134,780  
Ending Balance 159,714 $ 134,780
Unrealized Foreign Currency Translation Gains (Losses) [member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 472,401 483,657
Other comprehensive income (loss) 106,669 (11,256)
Ending Balance 579,070 472,401
Foreign Exchange Gain (Loss) on Net Investment Hedge [member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance (343,019) (351,474)
Other comprehensive income (loss) (81,735) 8,455
Ending Balance (424,754) (343,019)
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
Ending Balance 5,398 5,398
Accumulated Other Comprehensive Income [Member]    
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 134,780 137,581
Other comprehensive income (loss) 24,934 (2,801)
Ending Balance $ 159,714 $ 134,780