Note 4 - Derivatives - Cash Flow Hedges Included in Consolidated Statements of Condition (Details) - Interest Rate Swap [Member] - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Interest rate swaps related to FHLB advances included in assets, notional amount	$ 400,000	$ 475,000
Interest rate swaps related to FHLB advances included in assets, fair value	$ 31,285	$ 3,347