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Shareholders' Equity - Changes in Shareholders' Equity (Parenthetical) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Feb. 24, 2021
6.50% Exchangeable Senior Notes due 2026        
Class of Stock [Line Items]        
Stated interest rate 6.50%   6.50%  
6.50% Exchangeable Senior Notes due 2026 | Convertible Notes        
Class of Stock [Line Items]        
Debt instrument, face amount   $ 229,400,000 $ 229,900,000 $ 230,000,000
Stated interest rate 6.50% 6.50% 6.50% 6.50%
Debt instrument converted amount   $ 410,000,000 $ 410,000,000  
Common Stock        
Class of Stock [Line Items]        
Cash consideration   $ 229,400,000 $ 229,900,000  
Shares repurchased 1,966,779      
Common Stock | 6.50% Exchangeable Senior Notes due 2026        
Class of Stock [Line Items]        
Shares issued in connection with exchange for a portion of outstanding debt   12,414,455 12,400,000  
Shares issued   4,209,847