v3.26.1
Share capital - Narrative (Details)
6 Months Ended 12 Months Ended
Mar. 21, 2025
Apr. 30, 2026
shares
Feb. 28, 2025
shares
Dec. 31, 2026
Apr. 04, 2026
shares
Mar. 31, 2026
USD ($)
vote
shares
Mar. 31, 2025
USD ($)
shares
Mar. 31, 2024
shares
Disclosure of classes of share capital [table]                
Issued common shares (in shares)           137,774,851 146,399,347  
Percentage of average daily trading volume     25.00%          
Shares repurchased and cancelled | $           $ 86,238,000 $ 132,317,000  
Change in fair value of share repurchase liability | $           (11,800,000) 1,464,000  
Major ordinary share transactions                
Disclosure of classes of share capital [table]                
Percentage of average daily trading volume   25.00%            
Automatic Share Purchase Plan (ASPP)                
Disclosure of classes of share capital [table]                
Liabilities from share repurchase | $           $ 0 $ 0  
Subordinate voting shares                
Disclosure of classes of share capital [table]                
Votes per share (in votes per share) | vote           1    
Number of shares approved to repurchase for cancellation (in shares)           8,478,469    
Percentage of the company's subordinate voting shares 10.00%              
Maximum number of shares approved to repurchase for cancellation per day (in shares)     153,504          
Average daily trading volume (in shares)     614,018          
Subordinate voting shares | Major ordinary share transactions                
Disclosure of classes of share capital [table]                
Number of shares approved to repurchase for cancellation (in shares)         9,013,953      
Percentage of the company's subordinate voting shares       10.00%        
Maximum number of shares approved to repurchase for cancellation per day (in shares)   172,996            
Average daily trading volume (in shares)   691,987            
Issued and Outstanding Shares                
Disclosure of classes of share capital [table]                
Issued common shares (in shares)           137,774,851 146,399,347 153,547,616
Outstanding common shares (in shares)           137,774,851 146,399,347 153,547,616
Number of shares increase (decrease) through treasury share transactions (in shares)           (9,013,953) (9,722,677)  
Issued and Outstanding Shares | Automatic Share Purchase Plan (ASPP)                
Disclosure of classes of share capital [table]                
Shares repurchased and cancelled | $           $ 85,480,000 $ 134,193,000  
Treasury shares                
Disclosure of classes of share capital [table]                
Issued common shares (in shares)           2,098,958    
Outstanding common shares (in shares)           2,098,958