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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Statement of Stockholders' Equity [Abstract] |  |  |  |  |  |
Stock dividend, percent |  | 300.00% | [1] | 300.00% | 300.00% |
Stock dividends (in shares) |  | 642,567 | [1] | 623,848 | 605,670 |
Cash Dividends Paid (in dollars per share) | [2] | $ 1.06 |  | $ 1.03 | $ 0.96 |
Shares Issued for Stock Option Exercises, net (in shares) |  | 4,564 |  | 28,052 | 54,757 |
Shares Issued Under Directors Stock Plan (in shares) |  | 9,186 |  | 12,933 | 11,051 |
Shares Issued Under the Employee Stock Purchase Plan (in shares) |  | 3,872 |  | 15,207 | 14,903 |
Shares Issued for Dividend Reinvestment Plans (in shares) |  | 17,753 |  | 57,745 | 51,403 |
Purchase of Treasury Stock (in shares) |  | 140,965 |  | 84,132 | 73,555 |
Treasury Stock, Shares (in shares) |  | 5,124,073 |  | 4,872,355 |  |
Cumulative effect of adoption |  | $ 379,772 |  | $ 353,538 | $ 371,186 | $ 334,392
Accounting Standards Update [Extensible List] |  |  |  |  |  | Accounting Standards Update 2016-13 [Member]
[1] | Included in the shares issued for the 3% stock dividend in 2023 were treasury shares of 146,128.
[2] | Cash dividends paid per share have been adjusted for the September 26, 2023 3% stock dividend.

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