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Note 12 - Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 30, 2024
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  |  |  |  |  | Changes in |  |  |  |  |  |  |  |  |  |  | Changes in |  |  |  |  |
|  | Unrealized |  |  | Pension Plan |  |  |  |  |  |  | Unrealized |  |  | Pension Plan |  |  |  |  |
|  | Losses on |  |  | Assets and |  |  |  |  |  |  | Losses on |  |  | Assets and |  |  |  |  |
|  | Available-for- |  |  | Benefit |  |  |  |  |  |  | Available-for- |  |  | Benefit |  |  |  |  |
|  | Sale Debt Securities |  |  | Obligations |  |  | Total |  |  | Sale Debt Securities |  |  | Obligations |  |  | Total |
2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (22,794 | ) |  |  | (55 | ) |  |  | (22,849 | ) |  |  | (22,281 | ) |  |  | (55 | ) |  |  | (22,336 | )
Other comprehensive income (loss), net of taxes |  |  | 7,069 |  |  |  | — |  |  |  | 7,069 |  |  |  | 6,387 |  |  |  | — |  |  |  | 6,387 |
Reclassifications |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 169 |  |  |  | — |  |  |  | 169 |
Balance at end of period |  | $ | (15,725 | ) |  |  | (55 | ) |  |  | (15,780 | ) |  |  | (15,725 | ) |  |  | (55 | ) |  |  | (15,780 | )
2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (27,744 | ) |  |  | (27 | ) |  |  | (27,771 | ) |  |  | (29,927 | ) |  |  | (27 | ) |  |  | (29,954 | )
Other comprehensive (loss) income, net of taxes |  |  | (2,941 | ) |  |  | — |  |  |  | (2,941 | ) |  |  | (758 | ) |  |  | — |  |  |  | (758 | )
Balance at end of period |  | $ | (30,685 | ) |  |  | (27 | ) |  |  | (30,712 | ) |  |  | (30,685 | ) |  |  | (27 | ) |  |  | (30,712 | )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |  | Affected Line Item in the
|  | September 30, |  |  | September 30, |  | Consolidated Condensed
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |  | Statements of Income
Realized losses from sales of debt securities, available-for-sale |  | $ | — |  |  |  | — |  |  |  | (214 | ) |  |  | — |  | Net losses from sales of debt securities, available-for-sale
Income tax benefit |  |  | — |  |  |  | — |  |  |  | (45 | ) |  |  | — |  | Provision for income taxes
Reclassification adjustment, net of taxes |  | $ | — |  |  |  | — |  |  |  | (169 | ) |  |  | — |  |

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