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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, 2024	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 503,294	$ 421,985	$ 427,775
Other comprehensive (loss) income, net	(220)	4,768	(14,173)
Balance	526,392	503,294	421,985
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(11,126)	(15,621)	15
Other comprehensive (loss) income before reclassifications	(596)	4,479	(15,636)
Reclassified from AOCI	0	16	0
Other comprehensive (loss) income, net	(596)	4,495	(15,636)
Balance	(11,722)	(11,126)	(15,621)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	175	(98)	(1,561)
Other comprehensive (loss) income before reclassifications	347	242	1,357
Reclassified from AOCI	29	31	106
Other comprehensive (loss) income, net	376	273	1,463
Balance	551	175	(98)
AOCI Attributable to Parent [Member]
Balance	(10,951)	(15,719)	(1,546)
Other comprehensive (loss) income before reclassifications	(249)	4,721	(14,279)
Reclassified from AOCI	29	47	106
Other comprehensive (loss) income, net	(220)	4,768	(14,173)
Balance	$ (11,171)	$ (10,951)	$ (15,719)

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