Earnings per Share - Composition of Weighted-Average Common Shares (Denominator) Used in Basic and Diluted Earnings Per Share (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average Shares Outstanding (in shares)	103,220,081	101,913,111	101,556,427
Weighted Average Number of Shares Outstanding, Assuming Dilution, Deferred Compensation Plan	56,706	56,543	56,955
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share	103,524,130	102,205,497	101,822,201
Basic Earnings Per Share (in dollars per share)	$ 1.48	$ 1.40	$ 1.55
Diluted Earnings Per Share (in dollars per share)	$ 1.47	$ 1.39	$ 1.54
Weighted Average Number of Shares Outstanding, Restricted Stock	247,343	235,843	208,819
Common Shares Issued
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average Shares Outstanding (in shares)	125,614,804	123,603,380	122,780,523
Treasury Stock, Common
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average Shares Outstanding (in shares)	22,102,372	21,435,256	21,004,846
Deferred Compensation Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average Shares Outstanding (in shares)	56,603	57,200	56,206
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average Shares Outstanding (in shares)	235,748	197,813	163,044