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Schedule of Intangibles (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about intangible assets [Line Items]    
Balance $ 31,746 $ 35,401
Loan commitment fees related to Senior Credit Facility 2,272 2,307
Software 29,474 33,094
Balance 35,401  
Gross [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 53,416 51,912
Balance 51,912 39,707
Additions 1,510 12,205
Effect of foreign currency exchange differences (6)  
Gross [Member] | Loan Commitment Fees [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 15,478 14,776
Balance 14,776 14,138
Additions 702 638
Gross [Member] | Software [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 37,938 37,136
Balance 37,136 25,569
Additions 808 11,567
Effect of foreign currency exchange differences (6)  
Accumulated Amortization [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 21,670 16,511
Balance 16,511 11,591
Amortization expense 5,159 4,920
Accumulated Amortization [member] | Loan Commitment Fees [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 13,206 12,469
Balance 12,469 11,018
Amortization expense 737 1,451
Accumulated Amortization [member] | Software [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 8,464 4,042
Balance 4,042 573
Amortization expense $ 4,422 $ 3,469