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Note 6 - Components of Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Balances | $ 131,043 | $ 161,289 | $ 122,687 | $ 191,751
Balances | 128,444 | 136,240 | 128,444 | 136,240
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |  |
Balances | (69,692) | (30,972) | (81,421) | 2,854
Unrealized holding gain (loss) on available for sale securities, net of tax | (4,848) | (24,893) | 6,891 | (58,719)
Reclassification adjustment, net of tax | 2,642 |  | 2,632 |
Balances | (71,898) | (55,865) | (71,898) | (55,865)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Balances | (2,345) | (6,912) | (2,345) | (6,912)
Unrealized holding gain (loss) on available for sale securities, net of tax | 0 |  | 0 |
Reclassification adjustment, net of tax | 0 |  | 0 |
Balances | (2,345) | (6,912) | (2,345) | (6,912)
AOCI Attributable to Parent [Member] |  |  |  |
Balances | (72,037) | (37,884) | (83,766) | (4,058)
Unrealized holding gain (loss) on available for sale securities, net of tax | (4,848) | (24,893) | 6,891 | (58,719)
Reclassification adjustment, net of tax | 2,642 |  | 2,632 |
Balances | $ (74,243) | $ (62,777) | $ (74,243) | $ (62,777)

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