Note 12 - Schedule of Derivative Designated as Fair Value Hedging Instruments of Statements on Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative [Line Items]
Total	$ 23,110	$ 20,345	$ 45,308	$ 39,914
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Total	601	1,351	1,176	2,578
Designated as Hedging Instrument [Member] \| State and Municipal Securities [Member]
Derivative [Line Items]
Recognized on fair value hedge	815	1,000	1,646	2,010
Recognized on hedge portfolio	(2,034)	(2,039)	(4,094)	(4,076)
Recognized on remeasurement of fair value hedge	25	8	40	(10)
Designated as Hedging Instrument [Member] \| U.S. Government agencies and GSE mortgage backed securities
Derivative [Line Items]
Recognized on fair value hedge	2,430	2,999	4,898	5,995
Recognized on hedge portfolio	(668)	(661)	(1,343)	(1,329)
Recognized on remeasurement of fair value hedge	$ 33	$ 44	$ 29	$ (12)

Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.