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v3.23.1

Earnings per Share - Composition of Weighted-Average Common Shares (Denominator) Used in Basic and Diluted Earnings Per Share (Detail) - $ / shares | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Earnings Per Share [Abstract] |  |
Weighted Average Number of Shares Issued, Basic | 120,266,238 | 113,914,902
Average treasury shares (in shares) | (20,498,898) | (19,654,309)
Weighted Average Number of Shares, Deferred Compensation Plans | (55,821) | (55,684)
Average unearned nonvested shares | (150,688) | (126,210)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share (in shares) | 99,560,831 | 94,078,699
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share | 163,133 | 176,913
Weighted Average Number Of Additional Shares Deferred Compensation Plan | 55,852 | 55,712
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share (in shares) | 99,779,816 | 94,311,324
Basic Earnings per Share (in dollars per share) | $ 0.30 | $ 0.29
Diluted Earnings per Share (in dollars per share) | $ 0.30 | $ 0.29

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