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Earnings Per Share - Additional Information (Detail) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2025
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Schedule Of Earnings Per Share [Line Items]        
Common share dividends declared per share $ 3.25   $ 4.75 $ 1.04
Performance Restricted Stock Units [Member]        
Schedule Of Earnings Per Share [Line Items]        
Common shares issued   178,527    
Restricted Stock Units (RSUs) [Member]        
Schedule Of Earnings Per Share [Line Items]        
Options to purchase common shares not included in the computation of diluted EPS     300,000