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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cash dividends declared | $ 2.50 | $ 2.34 | $ 2.29
Total Shareholders’ Equity | $ 577,852 | $ 681,105 | $ 701,106
Cash dividends declared | $ 2.50 | $ 2.34 | $ 2.29
Exercise of stock options | 15,141 | 14,603 | 4,921
Purchase of treasury shares | 325,000 | 760,000 | 573,000
Retained Earnings [Member] |  |  |
Total Shareholders’ Equity | $ 706,696 | $ 641,826 | $ 589,988
Common Stock [Member] |  |  |
Total Shareholders’ Equity | 47,619 | 47,619 | 47,619
Capital Surplus[Member] |  |  |
Total Shareholders’ Equity | 170,980 | 170,942 | 171,304
Treasury Stock, Common [Member] |  |  |
Total Shareholders’ Equity | (215,955) | (193,542) | (139,038)
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Total Shareholders’ Equity | $ (131,488) | $ 14,260 | $ 31,233

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