Income Tax - Summary Of Temporary Difference Unused Tax Losses And Unused Tax Credits (Parenthetical) (Detail) - CAD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2022
Text Block [Abstract]
Deferred tax liabilities	$ 91,972	$ 87,408	$ 90,796
Deferred tax assets	9,293	48,216	$ 9,261
Deferred tax liability (asset)	$ 82,700	$ 39,200

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

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