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Note 6 - Components of Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2023
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Net Unrealized Gain (Loss) on Securities |  |  | Adjustments Related to Pension Benefits |  |  | Accumulated Other Comprehensive Loss |
Balance at December 31, 2021 |  | $ | 2,854 |  |  | $ | (6,912 | ) |  | $ | (4,058 | )
Unrealized holding loss on available for sale securities, net of tax of ($8,992) |  |  | (33,826 | ) |  |  | - |  |  |  | (33,826 | )
Balance at March 31, 2022 |  | $ | (30,972 | ) |  | $ | (6,912 | ) |  | $ | (37,884 | )
Balance at December 31, 2022 |  | $ | (81,421 | ) |  | $ | (2,345 | ) |  | $ | (83,766 | )
Unrealized holding gain on available for sale securities, net of tax of $3,121 |  |  | 11,738 |  |  |  | - |  |  |  | 11,738 |
Reclassification adjustment, net of tax of ($3) |  |  | (9 | ) |  |  | - |  |  |  | (9 | )
Balance at March 31, 2023 |  | $ | (69,692 | ) |  | $ | (2,345 | ) |  | $ | (72,037 | )

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