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Consolidated Statements of Shareholders' Equity (Parenthetical) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares
Statement of Stockholders' Equity [Abstract] |  |  |
Tax effect on employee benefit funded status adjustment | $ | $ 26 | $ 197 | $ 112
Cash dividends (in dollars per share) | $ 0.99 | $ 0.85 | $ 0.76
Issuance of treasury stock (in shares) | shares | 24,000 | 24,000 | 19,000
Common stock, par value (in dollars per share) | $ 1 | $ 1 | $ 1

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