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Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Common Stock Including Additional Paid in Capital [Member] |  |  |  |
Employee stock purchase plan (in shares) | 383 | 329 | 799 | 755
Dividend reinvestment plan (in shares) | 5,522 | 4,439 | 10,947 | 9,063
Stock option exercises (in shares) | 2,000 |  | 2,500 | 7,000
Stock grants to directors (in shares) | 11,905 | 11,171 | 11,905 | 11,171
Share repurchase program (in shares) |  |  | 119,120 |
Retained Earnings [Member] |  |  |  |
Cash dividends per common share (in dollars per share) | $ 0.26 | $ 0.22 | $ 0.52 | $ 0.44
Cash dividends per common share (in dollars per share) | $ 0.26 | $ 0.22 | $ 0.52 | $ 0.44

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