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Schedule of Intangibles (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about intangible assets [Line Items]    
Balance $ 28,116  
Loan commitment fees related to Senior Credit Facility 2,307 $ 3,120
Software 33,094 24,996
Balance 35,401 28,116
Gross [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 39,707 12,345
Additions 12,205 24,972
Reclassifications   2,390
Balance 51,912 39,707
Gross [Member] | Loan Commitment Fees [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 14,138 12,345
Additions 638 1,793
Balance 14,776 14,138
Gross [Member] | Software [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 25,569  
Additions 11,567 23,179
Reclassifications   2,390
Balance 37,136 25,569
Accumulated Amortization [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 11,591 9,029
Amortization expense 4,920 2,562
Balance 16,511 11,591
Accumulated Amortization [member] | Loan Commitment Fees [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 11,018 9,029
Amortization expense 1,451 1,989
Balance 12,469 11,018
Accumulated Amortization [member] | Software [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Balance 573  
Amortization expense 3,469 573
Balance $ 4,042 $ 573