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Note 15 - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Balance | $ 421,985 | [1] | $ 427,775 |  | $ 426,730
Other comprehensive (loss) income, net | 4,768 |  | (14,173) |  | 377
Balance | 503,294 |  | 421,985 | [1] | 427,775
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |  |  |
Balance | (15,621) |  | 15 |  | 1,106
Other comprehensive (loss) income before reclassifications | 4,479 |  | (15,636) |  | (1,091)
Reclassified from AOCI | 16 |  | 0 |  | 0
Other comprehensive (loss) income, net | 4,495 |  | (15,636) |  | (1,091)
Balance | (11,126) |  | (15,621) |  | 15
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |
Balance | (98) |  | (1,561) |  | (3,029)
Other comprehensive (loss) income before reclassifications | 242 |  | 1,357 |  | 1,160
Reclassified from AOCI | 31 |  | 106 |  | 308
Other comprehensive (loss) income, net | 273 |  | 1,463 |  | 1,468
Balance | 175 |  | (98) |  | (1,561)
AOCI Attributable to Parent [Member] |  |  |  |  |
Balance | (15,719) |  | (1,546) |  | (1,923)
Other comprehensive (loss) income before reclassifications | 4,721 |  | (14,279) |  | 69
Reclassified from AOCI | 47 |  | 106 |  | 308
Other comprehensive (loss) income, net | 4,768 |  | (14,173) |  | 377
Balance | $ (10,951) |  | $ (15,719) |  | $ (1,546)
[1] | Derived from audited financial statements

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