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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
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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)

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