Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Employee stock purchase plan (in shares) | 1,214 | 322 | 2,237 | 598 |
| Dividend reinvestment plan (in shares) | 2,930 | 4,687 | 6,531 | 9,257 |
| Stock grants to directors for retainer fees (in shares) | 8,676 | 9,210 | 8,997 | 9,810 |
| Cash dividends per common share (in dollars per share) | $ 0.39 | $ 0.37 | $ 0.78 | $ 0.74 |
| X | ||||||||||
- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of shares issued during the period as a result of an employee stock purchase plan. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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