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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
Additional Paid-in Capital [Member] |  |  |  |
Common stock issued through dividend reinvestment, shares (in shares) | 9,099 | 7,597 | 19,099 | 17,820
Common stock issued to ESOP, shares (in shares) |  |  | 8,333 | 7,294
Retained Earnings [Member] |  |  |  |
Cash dividends, per share (in dollars per share) | $ 0.21 | $ 0.21 | $ 0.42 | $ 0.42
Cash dividends, per share (in dollars per share) | 0.21 | 0.21 | 0.42 | 0.42
Cash dividends, per share (in dollars per share) | 0.21 | 0.21 | 0.42 | 0.42
Cash dividends, per share (in dollars per share) | $ 0.21 | $ 0.21 | $ 0.42 | $ 0.42

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