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Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Options and Stock Appreciation Rights (SARs) [Member]        
Earnings Per Share Basic [Line Items]        
Options/SARs to purchase shares of common stock were excluded from the computations of diluted earnings per share 1,206,200 883,188 1,208,435 860,788