Note 10 - FHLB Advances - Maturity and Interest Rate Information on Advances from FHLB (Details) - Federal Home Loan Bank, Advances, Putable Option [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amount due within one year		$ 15,000
Weighted average interest rate at year-end - next 12 months		0.31%
Amount due - one to two years after balance sheet date	$ 415,000
Weighted average interest rate at year-end - year two	4.58%
Total FHLB advances, Amount due	$ 415,000	$ 15,000
Total FHLB advances, Weighted average interest rate at year-end	4.58%	0.31%