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Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Statement of Stockholders' Equity [Abstract] |  |  |  |
Cash Dividends Paid, per Share (in dollars per share) | $ 0.26 | $ 0.252 | $ 0.52 | $ 0.505
Stock Options Exercised (in shares) | 15,337 | 2,873 | 22,264 | 17,155
Shares Issued Under the Directors' Stock Plan (in shares) | 2,672 | 4,245 | 5,844 | 4,245
Shares Issued Under Employee Stock Purchase Plan (in shares) | 3,648 | 5,310 | 7,917 | 8,958
Shares Issued for Dividend Reinvestment Plans (in shares) | 12,366 | 16,029 | 25,015 | 32,030
Purchase of Treasury Stock (in shares) | 5,101 |  | 5,101 | 50,021

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- Definition Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 + Details
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