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Schedule of Intangibles (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about intangible assets [Line Items]    
Balance $ 31,746  
Loan commitment fees related to Senior Credit Facility 2,109 $ 2,272
Software 25,557 29,474
Balance 27,666 31,746
Gross [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 53,416 51,912
Additions 747 1,510
Effect of foreign currency exchange differences 26 (6)
Balance 54,189 53,416
Gross [Member] | Loan Commitment Fees [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 15,478 14,776
Additions 690 702
Balance 16,168 15,478
Gross [Member] | Software [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 37,938 37,136
Additions 57 808
Effect of foreign currency exchange differences 26 (6)
Balance 38,021 37,938
Accumulated Amortization [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance (21,670) (16,511)
Amortization expense 4,824 5,159
Effect of foreign currency exchange differences 29  
Balance (26,523) (21,670)
Accumulated Amortization [member] | Loan Commitment Fees [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance (13,206) (12,469)
Amortization expense 853 737
Balance (14,059) (13,206)
Accumulated Amortization [member] | Software [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance (8,464) (4,042)
Amortization expense 3,971 4,422
Effect of foreign currency exchange differences 29  
Balance $ (12,464) $ (8,464)