v3.26.1
Share-based compensation plans (Share options number and weighted average price) (Details)
 12 Months Ended
Dec. 31, 2025
shares
$ / shares
Dec. 31, 2024
shares
$ / shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Exercised (145,895) (1,136,331)
Stock Option Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Beginning of year 259,958 1,396,289
Granted 0 0
Exercised (145,895) (1,136,331)
End of year 114,063 259,958
Weighted average exercisable price - beginning of year | $ / shares $ 15.05 $ 14.73
Weighted average exercisable price for granted | $ / shares 0 0
Weighted average exercise price for exercised | $ / shares 14.87 14.66
Weighted average exercisable price - end of year | $ / shares $ 15.27 $ 15.05
Exercisable 114,063 259,958
Options exercisable - Weighted average exercisable price | $ / shares $ 15.27 $ 15.05
Performance Share Unit Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Beginning of year 636,588 830,279
Granted 183,370 178,600
Settled (236,434) (368,636)
Forfeited 0 (4,930)
Dividends reinvested 1,133 1,275
End of year 584,657 636,588
Restricted Share Unit Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Beginning of year 734,000 814,683
Granted 327,867 322,267
Settled (293,551) (380,273)
Forfeited (11,826) (24,148)
Dividends reinvested 1,469 1,471
End of year 757,959 734,000
Phantom Stock Option Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Beginning of year 35,361 45,551
Granted 0 0
Forfeited 0 0
Exercised (22,861) (10,190)
End of year 12,500 35,361
Option price per share | $ / shares $ 11.61  
Options exercisable - Weighted average exercisable price | $ / shares $ 11.61 $ 12.48
Phantom Restricted Share Unit Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Beginning of year 25,560 28,000
Granted 9,121 9,096
Settled (10,704) (11,587)
Forfeited 0 0
Dividends reinvested 46 51
End of year 24,023 25,560
Bottom of range [Member] | Phantom Stock Option Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Option price per share | $ / shares   $ 15.27
Top of range [Member] | Phantom Stock Option Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Option price per share | $ / shares   $ 11.61
$15.27 [Member] | Stock Option Plan [Member]    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
End of year 114,063  
Weighted average exercisable price - end of year | $ / shares $ 15.27  
Exercisable 114,063  
Option price per share | $ / shares $ 15.27  
Options outstanding - Weighted average remaining life 1 year 2 months 12 days  
Options exercisable - Weighted average exercisable price | $ / shares $ 15.27