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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Employee stock purchase plan (in shares) | 327 | 281
Dividend reinvestment plan (in shares) | 6,880 | 5,835
Cash dividends per common share (in dollars per share) | $ 0.33 | $ 0.31
Stock option exercises (in shares) |  | 1,355

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