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Note 16 - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Balance | $ 428,819 | $ 332,857 | $ 350,714
Other comprehensive (loss) income, net | (417) | (77) | (589)
Balance | 426,730 | 428,819 | 332,857
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |
Balance | 866 | (285) | 975
Other comprehensive (loss) income before reclassifications | 544 | 1,117 | (1,748)
Reclassified from AOCI | (304) | 34 | 488
Other comprehensive (loss) income, net | 240 | 1,151 | (1,260)
Balance | 1,106 | 866 | (285)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Balance | (2,372) | (1,144) | (1,815)
Other comprehensive (loss) income before reclassifications | (961) | (1,448) | 446
Reclassified from AOCI | 304 | 220 | 225
Other comprehensive (loss) income, net | (657) | (1,228) | 671
Balance | (3,029) | (2,372) | (1,144)
AOCI Attributable to Parent [Member] |  |  |
Balance | (1,506) | (1,429) | (840)
Other comprehensive (loss) income before reclassifications | (417) | (331) | (1,302)
Reclassified from AOCI | 0 | 254 | 713
Other comprehensive (loss) income, net | (417) | (77) | (589)
Balance | $ (1,923) | $ (1,506) | $ (1,429)

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