Note 8 - Derivatives and Hedging Activities - Significantly Impact of operations (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative Assets	$ 187,341	$ 177,631
Derivative Liabilities.	215,735	200,701
Unhedged Derivatives
Derivative Assets	951	2,213
Unhedged Derivatives | Interest rate swaps
Derivative Asset, Notional Amount	3,308,024	2,528,949
Derivative Assets	181,854	166,614
Derivative Liability, Notional Amount	3,308,024	2,528,949
Derivative Liabilities.	$ 181,854	$ 166,614