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Earnings Per Share - Additional Information (Detail) - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2024
Sep. 30, 2024
Sep. 30, 2023
Schedule Of Earnings Per Share [Line Items]      
Common share dividends declared per share   $ 1.04 $ 1.56
Performance Restricted Stock Units [Member]      
Schedule Of Earnings Per Share [Line Items]      
Common shares issued 44,631