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Share-based compensation - Disclosure of deferred and restricted share units (Details) - shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
DSU [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number of units, beginning of period 429,575 376,203
Number of units, granted 56,895 78,200
Number of units reinvested dividends 5,545 6,018
Number of units, settled (69,678) (30,846)
Number of units, forfeited (8,059) 0
Number of units, end of period 414,278 429,575
Number of units, vested 365,098 350,822
RSU [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number of units, beginning of period 852,803 878,397
Number of units, granted 235,540 275,520
Number of units reinvested dividends 10,836 13,483
Number of units, settled (298,313) (278,806)
Number of units, forfeited (83,761) (35,791)
Number of units, end of period 717,105 852,803
Number of units, vested 0 0