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Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Retained Earnings [Member] |  |
Cash dividends per share (in dollars per share) | $ 0.15 | $ 0.14
Treasury acquired, shares (in shares) | 58,200 |

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