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Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Retained Earnings [Member] |  |  |  |
Cash dividends per share (in dollars per share) | $ 0.16 | $ 0.15 | $ 0.32 | $ 0.30
Treasury acquired, shares (in shares) | 131,577 |  | 181,045 | 58,200

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