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Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Retained Earnings [Member] |  |  |  |
Cash dividends per share (in dollars per share) | $ 0.17 | $ 0.16 | $ 0.34 | $ 0.32
Treasury acquired, shares (in shares) | 63,214 | 131,577 | 95,364 | 181,045

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