Note 16 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (loss) by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Balance	$ 940,476	$ 858,103
Balance	975,473	874,711
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(94,190)	(92,678)
Net current period other comprehensive income (loss)	13,967	(4,775)
Balance	(80,223)	(97,453)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	2,922	(179)
Net current period other comprehensive income (loss)	(2,656)	2,519
Balance	266	2,340
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	117	59
Net current period other comprehensive income (loss)	0	0
Balance	117	59
AOCI Attributable to Parent [Member]
Balance	(91,151)	(92,798)
Net current period other comprehensive income (loss)	11,311	(2,256)
Balance	$ (79,840)	$ (95,054)