Note 16 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (loss) by Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Balance	$ 894,535	$ 808,082	$ 858,103	$ 760,432
Balance	934,094	806,918	934,094	806,918
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(97,760)	(109,741)	(92,678)	(115,648)
Net current period other comprehensive income (loss)	24,827	(22,586)	19,745	(16,679)
Balance	(72,933)	(132,327)	(72,933)	(132,327)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	2,721	2,213	(179)	0
Net current period other comprehensive income (loss)	(5,120)	2,097	(2,220)	4,310
Balance	(2,399)	4,310	(2,399)	4,310
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	59	112	59	112
Net current period other comprehensive income (loss)	0	0	0	0
Balance	59	112	59	112
AOCI Attributable to Parent [Member]
Balance	(94,980)	(107,416)	(92,798)	(115,536)
Net current period other comprehensive income (loss)	19,707	(20,489)	17,525	(12,369)
Balance	$ (75,273)	$ (127,905)	$ (75,273)	$ (127,905)