Note 15 - Accumulated Other Comprehensive (Loss) Income - Other Comprehensive (loss) Income by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023		Mar. 31, 2022
Balance	$ 354,530	[1]	$ 327,473
Balance	369,546		330,466
Accumulated Pension Plan Adjustment Net Unamortized Gain (Loss) [Member]
Balance	(23)		30
Other comprehensive income (loss) before reclassification	0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive income (loss)	0		0
Balance	(23)		30
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Balance	172		9
Other comprehensive income (loss) before reclassification	0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive income (loss)	0		0
Balance	172		9
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	20,867		3,993
Other comprehensive income (loss) before reclassification	(3,136)		8,461
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive income (loss)	(3,136)		8,461
Balance	17,731		12,454
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(37,901)		1,868
Other comprehensive income (loss) before reclassification	7,493		(17,202)
Amounts reclassified from accumulated other comprehensive loss, net of tax	45		116
Net current period other comprehensive income (loss)	7,538		(17,086)
Balance	(30,363)		(15,218)
AOCI Accumulated Gain (Loss) Securities Fair Value Hedge Parent [Member]
Balance	5,406		(418)
Other comprehensive income (loss) before reclassification	(948)		2,070
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current period other comprehensive income (loss)	(948)		2,070
Balance	4,458		1,652
AOCI Attributable to Parent [Member]
Balance	(11,479)		5,482
Other comprehensive income (loss) before reclassification	3,409		(6,671)
Amounts reclassified from accumulated other comprehensive loss, net of tax	45		116
Net current period other comprehensive income (loss)	3,454		(6,555)
Balance	$ (8,025)		$ (1,073)

[1] Derived from audited consolidated financial statements