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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement of Stockholders' Equity [Abstract] |  |  |  |  |
Stock dividend, percent |  | 300.00% | [1] | 300.00% | 300.00%
Stock dividends (in shares) |  | 605,670 | [1] | 588,025 | 570,884
Cash Dividends Paid (in dollars per share) | [2] | $ 1.02 |  | $ 0.99 | $ 0.96
Shares Issued for Stock Option Exercises, net (in shares) |  | 54,757 |  | 33,112 | 84,216
Shares Issued Under Directors Stock Plan (in shares) |  | 11,051 |  | 4,245 | 7,580
Shares Issued Under the Employee Stock Purchase Plan (in shares) |  | 14,903 |  | 18,286 | 15,379
Shares Issued for Dividend Reinvestment Plans (in shares) |  | 51,403 |  | 63,425 | 51,191
Purchase of Treasury Stock (in shares) |  | 73,555 |  | 52,505 | 73,495
Allocation of ESOP Stock (in shares) |  |  |  |  | 5,151
Treasury Stock, Shares (in shares) |  | 4,759,414 |  | 4,678,736 |
[1] | Included in the shares issued for the 3% stock dividend in 2021 were treasury shares of 139,237
[2] | Cash dividends paid per share have been adjusted for the September 24, 2021 3% stock dividend.

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