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Share-based payment arrangements - Additional information (Details)
$ / shares in Units, $ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
CAD ($)
shares
tranche
$ / shares
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2022
CAD ($)
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
CAD ($)
Dec. 31, 2021
USD ($)
shares
$ / shares
Dec. 31, 2020
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of share options granted (in shares) 1,265,672 1,091,891          
Employee stock option plan              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Term of employee option plan 5 years            
Number of tranches | tranche 3            
Vesting percentage on first anniversary 33.33%            
Vesting percentage on second anniversary 33.33%            
Vesting percentage on third anniversary 33.33%            
Number of share options available to grant under the plan (in shares) 4,043,166 4,427,408          
Number of share purchase options vested and exercisable (in shares) 1,834,985 2,254,702          
Weighted average exercise price of share purchase options vested and exercisable (in Cdn$ per share) | $ / shares $ 8.92 $ 11.51          
Weighted average share price at date of options exercised (in Cdn$ per share) | $ / shares $ 13.64 $ 13.26          
Weighted average fair value per equity instrument granted (in $CDN per share) | $     $ 6.29   $ 5.62    
Restricted share unit plan              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Maximum number of shares reserved for issue under options (in shares)       5,000,000      
Number of share purchased held in trust share-based payment arrangement (in shares) 934,705            
Common shares purchased (in shares) 1,269,900            
Market value | $ $ 15,526,000            
Number of share purchase options vested and exercisable (in shares)       17,371   109,649  
Restricted share units with no performance criteria              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Vesting percentage on first anniversary 33.33%            
Vesting percentage on second anniversary 33.33%            
Vesting percentage on third anniversary 33.33%            
Number of share options granted in share-based payment arrangement (in shares) 176,414 180,132          
Weighted average fair value per equity instrument granted (in $CDN per share) | $ / shares $ 14.44            
Number of common shares equity instruments exercise into once vested (in shares) 1            
Number of shares outstanding       328,677   471,762 478,067
Restricted Shares With Performance Criteria              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Term of employee option plan 3 years            
Number of share options granted in share-based payment arrangement (in shares) 229,979 440,508          
Number of shares outstanding       566,740   908,377 689,967
Restricted Shares With Performance Criteria | Bottom of range              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Performance target award (range) 0.00%            
Restricted Shares With Performance Criteria | Top of range              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Performance target award (range) 200.00%            
Restricted Shares With Performance Criteria, Performance Criteria Not Met              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of share options granted in share-based payment arrangement (in shares) 0            
Restricted Shares With Performance Criteria, Performance Criteria Met              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of share options granted in share-based payment arrangement (in shares) 229,979 80,235          
Deferred Share Units Plans              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of shares outstanding       335,829   351,232  
Liabilities from share-based payment transactions | $       $ 2,803   $ 3,291  
Performance Share Unit              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of share options granted in share-based payment arrangement (in shares) 616,920 267,936          
Number of shares outstanding       342,670   278,020 525,605
Performance Share Unit | Bottom of range              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Performance target award (range) 0.00%            
Performance Share Unit | Top of range              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Performance target award (range) 200.00%            
Performance Share Unit, Performance Criteria Not Met              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of share options granted in share-based payment arrangement (in shares) 352,837 13,937          
Weighted average fair value per equity instrument granted (in $CDN per share) | (per share) $ 28.66         $ 24.40  
Performance Share Unit, Performance Criteria Met              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of share options granted in share-based payment arrangement (in shares) 264,083 253,999          
Number of shares authorized for issuance (in shares) 3,126,000