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Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Retained Earnings [Member] |  |
Cash dividends per share (in dollars per share) |  | $ 0.59
Cash dividends per share (in dollars per share) | $ 0.57 |
Treasury acquired, shares (in shares) | 98,832 |

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