Note 8 - Other Assets - Summary of Major Components of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash surrender value of life insurance other than BOLI	$ 19,895	$ 17,843
Net deferred tax asset	51,646	47,236
Investments in tax credit partnerships	185,424	175,056
Swap assets	12,437	5,133
Prepaid assets	6,369	5,873
WM&T fees receivable	4,523	4,205
Mortgage servicing rights	11,333	13,082	$ 15,219	$ 4,528
Other real estate owned	10	10
Other	17,113	18,922
Total other assets	$ 308,750	$ 287,360