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Share-based compensation - DSUs and RSUs granted (Details)
9 Months Ended
Sep. 30, 2022
shares
$ / shares
DSUs  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Number of units - beginning of period (in shares) 59,654
Number of units granted (in shares) 25,372
Number of units - end of period (in shares) 85,026
DSUs | Minimum  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average exercise price of units granted (in cad per share) | $ / shares $ 38.97
DSUs | Maximum  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average exercise price of units granted (in cad per share) | $ / shares $ 86.93
RSUs  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Number of units - beginning of period (in shares) 46,591
Number of units granted (in shares) 97,816
Number of units released (in shares) (2,800)
Number of units forfeited (in shares) (30,222)
Number of units - end of period (in shares) 111,385
Weighted average exercise price of units released (in cad per share) | $ / shares $ 94.05
RSUs | Minimum  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average exercise price of units granted (in cad per share) | $ / shares 40.30
Weighted average exercise price of units forfeited (in cad per share) | $ / shares 86.38
RSUs | Maximum  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average exercise price of units granted (in cad per share) | $ / shares 54.26
Weighted average exercise price of units forfeited (in cad per share) | $ / shares $ 94.05