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Share-based compensation - DSUs and RSUs granted (Details)
3 Months Ended
Mar. 31, 2023
shares
$ / shares
DSUs  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Number of units - beginning of period (in shares) 87,222
Granted (in shares) 1,862
Number of units - end of period (in shares) 89,084
Weighted average exercise price of units granted (in cad per share) | $ / shares $ 43.93
RSUs  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Number of units - beginning of period (in shares) 103,626
Granted (in shares) 111,724
Released (in shares) (5,249)
Forfeited (in shares) (3,509)
Number of units - end of period (in shares) 206,592
Weighted average exercise price of units granted (in cad per share) | $ / shares $ 52.38
RSUs | Minimum  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average exercise price of units released (in cad per share) | $ / shares 54.26
Weighted average exercise price of units forfeited (in cad per share) | $ / shares 54.26
RSUs | Maximum  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average exercise price of units released (in cad per share) | $ / shares 86.38
Weighted average exercise price of units forfeited (in cad per share) | $ / shares $ 86.38