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Note 15 - Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Net unrealized |  |  | Net unrealized |  |  | Minimum |  |  |  |  |
|  | gains (losses) |  |  | gains (losses) |  |  | pension |  |  |  |  |
|  | on available for sale |  |  | on cash |  |  | liability |  |  |  |  |
(in thousands) |  | debt securities |  |  | flow hedges |  |  | adjustment |  |  | Total |
Balance, January 1, 2020 |  | $ | 1,085 |  |  | $ | (39 | ) |  | $ | (369 | ) |  | $ | 677 |
Net current period other comprehensive income (loss) |  |  | 8,224 |  |  |  | (82 | ) |  |  | (78 | ) |  |  | 8,064 |
Balance, December 31, 2020 |  | $ | 9,309 |  |  | $ | (121 | ) |  | $ | (447 | ) |  | $ | 8,741 |
Balance, January 1, 2021 |  | $ | 9,309 |  |  | $ | (121 | ) |  | $ | (447 | ) |  | $ | 8,741 |
Net current period other comprehensive income (loss) |  |  | (16,966 | ) |  |  | 121 |  |  |  | 164 |  |  |  | (16,681 | )
Balance, December 31, 2021 |  | $ | (7,657 | ) |  | $ | - |  |  | $ | (283 | ) |  | $ | (7,940 | )
Balance, January 1, 2022 |  | $ | (7,657 | ) |  | $ | - |  |  | $ | (283 | ) |  | $ | (7,940 | )
Net current period other comprehensive income (loss) |  |  | (107,991 | ) |  |  | - |  |  |  | 395 |  |  |  | (107,596 | )
Balance, December 31, 2022 |  | $ | (115,648 | ) |  | $ | - |  |  | $ | 112 |  |  | $ | (115,536 | )

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