Note 15 - Federal and State Income Taxes - Federal and State Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal and State Income Taxes
Current	$ 14,008	$ 19,165	$ 7,290
Deferred	(946)	(4,682)	15,272
Federal and state income tax expense	$ 13,062	$ 14,483	$ 22,562