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Earnings per Share - Composition of Weighted-Average Common Shares (Denominator) Used in Basic and Diluted Earnings Per Share (Detail) - $ / shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Average Shares Outstanding (in shares) | 101,556,427 | 93,612,043 | 95,583,890
Weighted Average Number of Shares Outstanding, Assuming Dilution, Deferred Compensation Plan | 56,955 | 55,820 | 55,683
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share | 101,822,201 | 93,887,447 | 95,840,285
Basic Earnings Per Share (in dollars per share) | $ 1.55 | $ 1.37 | $ 1.45
Diluted Earnings Per Share (in dollars per share) | $ 1.54 | $ 1.37 | $ 1.44
Weighted Average Number of Shares Outstanding, Restricted Stock | 208,819 | 219,584 | 200,712
Common Shares Issued |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Average Shares Outstanding (in shares) | 122,780,523 | 113,914,902 | 113,914,902
Treasury Stock, Common |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Average Shares Outstanding (in shares) | 21,004,846 | 20,089,722 | 18,140,857
Deferred Compensation Plan |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Average Shares Outstanding (in shares) | 56,206 | 55,734 | 55,590
Restricted Stock [Member] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Average Shares Outstanding (in shares) | 163,044 | 157,403 | 134,565

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