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Income Taxes - Disclosure Of Change In Fair Value of Convertible Debentures Attributable To Credit Risk Fluctuation (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Change In Fair Value of Convertible Debentures Attributable To Credit Risk Fluctuation [Line Items]    
Deferred tax expense (recovery) charged to OCI $ 4,567 $ (449)
Change In Fair Value Of Convertible Debentures Attributable To Change In Credit Risk [member]    
Disclosure Of Change In Fair Value of Convertible Debentures Attributable To Credit Risk Fluctuation [Line Items]    
Deferred tax expense (recovery) charged to OCI 4,114 (328)
Share Of Other Comprehensive Income Loss Of Associate [member]    
Disclosure Of Change In Fair Value of Convertible Debentures Attributable To Credit Risk Fluctuation [Line Items]    
Deferred tax expense (recovery) charged to OCI 453 0
Change in fair value of marketable securities [member]    
Disclosure Of Change In Fair Value of Convertible Debentures Attributable To Credit Risk Fluctuation [Line Items]    
Deferred tax expense (recovery) charged to OCI $ 0 $ (121)