Note 11 - Derivative Instruments and Hedging Activities - Effect of Derivative and Hedging Activity, on Consolidated Statements of Income (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands		12 Months Ended
	Jul. 26, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative expense	$ (72,000)
Interest and Fees on Loans [Member]
Derivative expense		$ 125	$ 328	$ 320
Designated as Hedging Instrument [Member] | Interest and Fees on Loans [Member]
Derivative expense		35	111	85
Not Designated as Hedging Instrument [Member] | Interest and Fees on Loans [Member]
Derivative expense		$ 90	$ 217	$ 235