Earnings per Share - Composition of Weighted-Average Common Shares (Denominator) Used in Basic and Diluted Earnings Per Share (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Weighted Average Number of Shares Issued, Basic	123,603,380	120,266,238
Average treasury shares (in shares)	(21,425,781)	(20,498,898)
Weighted Average Number of Shares, Deferred Compensation Plans	(56,966)	(55,821)
Average unearned nonvested shares	(139,385)	(150,688)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share (in shares)	101,981,248	99,560,831
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share	160,353	163,133
Weighted Average Number Of Additional Shares Deferred Compensation Plan	57,298	55,852
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share (in shares)	102,198,899	99,779,816
Basic Earnings per Share (in dollars per share)	$ 0.37	$ 0.30
Diluted Earnings per Share (in dollars per share)	$ 0.37	$ 0.30