v3.26.3
Shareholders' equity - Common Shares Issued and Outstanding (Details) - shares
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2026
Sep. 30, 2025
Movement In Common Stock Outstanding [Roll Forward]      
Common shares issued, beginning of period (in shares)   116,989,799  
Common shares outstanding, beginning of period (in shares)   116,989,799  
Shares repurchased (in shares) (1,102,434) (4,392,732)  
Common shares issued, end of period (in shares) 115,032,060 115,032,060  
Common shares outstanding, end of period (in shares) 115,032,060 115,032,060  
Common Stock      
Movement In Common Stock Outstanding [Roll Forward]      
Common shares issued, beginning of period (in shares)   116,989,799 116,429,057
Common shares outstanding, beginning of period (in shares)   116,989,799 116,429,057
Issuance of common shares upon exercise of options (in shares)   0 100,000
Shares repurchased (in shares)   (4,392,732) (500,000)
Issuance of common shares upon exercise of warrants (in shares)   0 11,013
Common shares issued, end of period (in shares) 115,032,060 115,032,060 116,807,497
Common shares outstanding, end of period (in shares) 115,032,060 115,032,060 116,807,497
Common Stock | Restricted share awards      
Movement In Common Stock Outstanding [Roll Forward]      
Issuance of common shares, net of forfeitures and shares withheld (in shares)   2,434,993 767,427