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Intangible Assets - Summary of Detailed Information About Intangible Assets (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]      
Beginning balance $ 16,544 $ 22,058  
Ending balance 10,118 16,544 $ 22,058
Customer relationships and other [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 10,528 15,663  
Ending balance 5,777 10,528 15,663
Software [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 6,016 6,395  
Ending balance 4,341 6,016 6,395
Cost [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 118,522 122,178 122,463
Additions     13
Reclassification 404 2,419 2,768
Disposal   (5,045) (431)
Currency translation effects (263) (1,030) (2,635)
Ending balance 118,663 118,522 122,178
Cost [member] | Customer relationships and other [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 69,824 70,895 72,899
Currency translation effects (230) (1,071) (2,004)
Ending balance 69,594 69,824 70,895
Cost [member] | Software [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 48,698 51,283 49,564
Additions     13
Reclassification 404 2,419 2,768
Disposal   (5,045) (431)
Currency translation effects (33) 41 (631)
Ending balance 49,069 48,698 51,283
Accumulated amortization [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance (101,978) (100,120) (93,581)
Amortization charge (6,721) (7,772) (8,660)
Disposal   5,045 431
Currency translation effects 154 869 1,690
Ending balance (108,545) (101,978) (100,120)
Accumulated amortization [member] | Customer relationships and other [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance (59,296) (55,232) (51,326)
Amortization charge (4,642) (4,974) (4,966)
Currency translation effects 121 910 1,060
Ending balance (63,817) (59,296) (55,232)
Accumulated amortization [member] | Software [member]      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance (42,682) (44,888) (42,255)
Amortization charge (2,079) (2,798) (3,694)
Disposal   5,045 431
Currency translation effects 33 (41) 630
Ending balance $ (44,728) $ (42,682) $ (44,888)