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Capital Stock - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 11, 2024
$ / shares
Oct. 31, 2024
$ / shares
Sep. 30, 2024
USD ($)
vote
$ / shares
shares
Jun. 30, 2024
$ / shares
Mar. 31, 2024
$ / shares
Dec. 31, 2023
$ / shares
shares
Sep. 30, 2023
$ / shares
Jun. 30, 2023
$ / shares
Mar. 31, 2023
$ / shares
Sep. 30, 2024
USD ($)
vote
$ / shares
shares
Sep. 30, 2023
$ / shares
Sep. 30, 2024
USD ($)
vote
shares
Oct. 31, 2023
USD ($)
Dividends Payable [Line Items]                          
Authorized share capital (in shares) | shares     233,333,000     233,333,000       233,333,000   233,333,000  
Number of votes per share | vote     1             1   1  
Shareholder ownership threshold for voting rights                   9.50%      
Maximum number of votes per share for certain shareholders under 9.5% shareholder provision | vote     1             1   1  
Minimum number of votes per share for other shareholders under 9.5% shareholder provision | vote     1             1   1  
Quarterly cash dividends declared (in dollars per share)     $ 0.28 $ 0.28 $ 0.28 $ 0.25 $ 0.25 $ 0.25 $ 0.25 $ 0.84 $ 1.00    
Quarterly cash dividends paid (in dollars per share)     $ 0.28 $ 0.28 $ 0.28 $ 0.25 $ 0.25 $ 0.25 $ 0.25 $ 0.84 $ 1.00    
Share Repurchase Plan 2023                          
Dividends Payable [Line Items]                          
Share repurchase approved amount | $                         $ 250,000,000
Stock repurchased (in shares) | shares                       662,403  
Stock repurchased, value | $                       $ 36,700,000  
Remaining authorized repurchase amount | $     $ 213,300,000             $ 213,300,000   $ 213,300,000  
Forecast                          
Dividends Payable [Line Items]                          
Quarterly cash dividends paid (in dollars per share) $ 0.28                        
Subsequent Event                          
Dividends Payable [Line Items]                          
Quarterly cash dividends declared (in dollars per share)   $ 0.28