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Income Tax - Summary Of Temporary Difference Unused Tax Losses And Unused Tax Credits (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance [1],[2] $ (66,693) [3] $ (82,679)
Acquisition (Note 6) [1],[2]   23,692
Charged to net earnings 10,863 [3] (3,265) [1],[2]
Charged to OCI 107 [3] 4 [1],[2]
Exchange differences (3,259) [3] (4,445) [1],[2]
Ending Balance [3] (58,982) (66,693) [1],[2]
Accounting provisions and accruals    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 4,356 7,022
Acquisition (Note 6) [1]   4,750
Charged to net earnings 30,159 (7,467)
Charged to OCI 0 0
Exchange differences 1,474 51
Ending Balance 35,989 4,356
Tax losses    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 56,497 6,519
Acquisition (Note 6) [1]   49,513
Charged to net earnings (19,678) 1,325
Charged to OCI 0 0
Exchange differences 237 (860)
Ending Balance 37,056 56,497
Long-term assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance (111,777) (86,255)
Acquisition (Note 6) [1]   (24,033)
Charged to net earnings 22,226 1,022
Charged to OCI 0 0
Exchange differences (3,419) (2,511)
Ending Balance (92,970) (111,777)
Other    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 0 511
Acquisition (Note 6) [1]   0
Charged to net earnings   0
Charged to OCI   0
Exchange differences   (511)
Ending Balance   0
Exchange rate effects on tax bases    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance (15,769) (10,476)
Acquisition (Note 6) [1]   (6,538)
Charged to net earnings (21,737) 1,859
Charged to OCI 0 0
Exchange differences (1,551) (614)
Ending Balance (39,057) (15,769)
Cash flow hedges    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 0 0
Acquisition (Note 6) [1]   0
Charged to net earnings (107) (4)
Charged to OCI 107 4
Exchange differences 0 0
Ending Balance $ 0 $ 0
[1] Certain balances as at December 31, 2022 have been re-presented as a result of measurement period adjustments related to the Transaction as required by IFRS 3 “Business Combinations”, refer to Note 6 “Acquisition” for more information.
[2] Net deferred tax liabilities at December 31, 2022 of $67 million consist of liabilities of $89 million net of assets of $22 million.
[3] Net deferred tax liabilities at December 31, 2023 of $59 million consist of liabilities of $86 million net of assets of $27 million.