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Note 7 - Components of Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following tables provide information about components of accumulated other comprehensive loss as of the dates indicated:
|  | Net Unrealized Loss on Securities |  |  | Adjustments Related to Pension Benefits |  |  | Accumulated Other Comprehensive Loss |
Balance at June 30, 2024 |  | $ | (66,044 | ) |  | $ | (2,310 | ) |  | $ | (68,354 | )
Unrealized holding gain on available for sale securities, net of tax of $4,284 |  |  | 16,115 |  |  |  | - |  |  |  | 16,115 |
Balance at September 30, 2024 |  | $ | (49,929 | ) |  | $ | (2,310 | ) |  | $ | (52,239 | )
Balance at June 30, 2025 |  | $ | (50,740 | ) |  | $ | 328 |  |  | $ | (50,412 | )
Unrealized holding gain on available for sale securities, net of tax of $1,599 |  |  | 6,015 |  |  |  | - |  |  |  | 6,015 |
Balance at September 30, 2025 |  | $ | (44,725 | ) |  | $ | 328 |  |  | $ | (44,397 | )
|  | Net Unrealized Loss on Securities |  |  | Adjustments Related to Pension Benefits |  |  | Accumulated Other Comprehensive Loss |
Balance at December 31, 2023 |  | $ | (62,556 | ) |  | $ | (2,310 | ) |  | $ | (64,866 | )
Unrealized holding gain on available for sale securities, net of tax of $3,357 |  |  | 12,627 |  |  |  | - |  |  |  | 12,627 |
Balance at September 30, 2024 |  | $ | (49,929 | ) |  | $ | (2,310 | ) |  | $ | (52,239 | )
Balance at December 31, 2024 |  | $ | (62,093 | ) |  | $ | 328 |  |  | $ | (61,765 | )
Unrealized holding gain on available for sale securities, net of tax of $4,616 |  |  | 17,368 |  |  |  | - |  |  |  | 17,368 |
Balance at September 30, 2025 |  | $ | (44,725 | ) |  | $ | 328 |  |  | $ | (44,397 | )

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