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Shares - Common shares (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance, common shares outstanding (in shares) 27,827,282  
Beginning balance, treasury shares outstanding (in shares) (1,090,187)  
Beginning balance, outstanding (in shares) 26,737,095 26,420,821
Purchase of treasury shares (in shares) (15,641) (20,955)
Issued upon conversion of convertible debentures (in shares) 26,576  
Retired through share purchase programs (in shares) (149,408)  
Settlement of certain equity classified stock-based compensation (in shares) 105,500 337,229
Ending balance, common shares outstanding (in shares) 27,704,450 27,827,282
Ending balance, treasury shares outstanding (in shares) (1,000,328) (1,090,187)
Ending balance, outstanding (in shares) 26,704,122 26,737,095
Shares to satisfy recipient tax withholding requirements (in shares) 76,542 234,728
Satisfaction of recipient tax withholding $ 2,019 $ 5,479
Common shares    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance, common shares outstanding (in shares) 27,827,282 27,827,282
Purchase of treasury shares (in shares) 0 0
Issued upon conversion of convertible debentures (in shares) 26,576  
Retired through share purchase programs (in shares) (149,408)  
Settlement of certain equity classified stock-based compensation (in shares) 0 0
Ending balance, common shares outstanding (in shares) 27,704,450 27,827,282
Treasury shares    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance, treasury shares outstanding (in shares) (1,090,187) (1,406,461)
Purchase of treasury shares (in shares) (15,641) (20,955)
Issued upon conversion of convertible debentures (in shares) 0  
Retired through share purchase programs (in shares) 0  
Settlement of certain equity classified stock-based compensation (in shares) 105,500 337,229
Ending balance, treasury shares outstanding (in shares) (1,000,328) (1,090,187)