Note 6 - Premises and Equipment - Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Premises and Equipment
Land	$ 17,807	$ 17,804
Buildings (useful lives 15 to 39 years)	110,271	104,780
Construction in process - buildings	7,773	3,997
Furniture and equipment (useful lives 3 to 15 years)	52,350	54,305
Premises and equipment	188,201	180,886
Less accumulated depreciation	64,924	62,938
Premises and equipment, net	$ 123,277	$ 117,948