XML 121 R71.htm IDEA: XBRL DOCUMENT v3.20.1
Intangible assets (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year $ 65,602  
Intangible assets, end of year 60,410 $ 65,602
Cost [Member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 238,190 228,631
Effect of movements in exchange rates (5,664) 9,559
Intangible assets, end of year 232,526 238,190
Accumulated amortization [member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 172,588 158,619
Amortization charge 5,049 4,799
Effect of movements in exchange rates (5,521) 9,170
Intangible assets, end of year 172,116 172,588
Contracts [member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 3,937  
Intangible assets, end of year 2,613 3,937
Contracts [member] | Cost [Member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 119,371 109,812
Effect of movements in exchange rates (5,664) 9,559
Intangible assets, end of year 113,707 119,371
Contracts [member] | Accumulated amortization [member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 115,434 104,939
Amortization charge 1,181 1,325
Effect of movements in exchange rates (5,521) 9,170
Intangible assets, end of year 111,094 115,434
Intellectual Property [member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 61,665  
Intangible assets, end of year 57,797 61,665
Intellectual Property [member] | Cost [Member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 118,819 118,819
Effect of movements in exchange rates 0 0
Intangible assets, end of year 118,819 118,819
Intellectual Property [member] | Accumulated amortization [member]    
Reconciliation of carrying amount [Line Items]    
Intangible assets, beginning of year 57,154 53,680
Amortization charge 3,868 3,474
Effect of movements in exchange rates 0 0
Intangible assets, end of year $ 61,022 $ 57,154