Note 10 - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal, current									$ 16,185	$ 33,169	$ 32,364
State, current									9,635	13,247	12,325
Subtotal, current									25,820	46,416	44,689
Deferred:
Federal, deferred									2,903	(3,353)	(110)
State, deferred									1,232	2,950	126
Subtotal, deferred									4,135	(403)	16
Income tax expense	$ 6,213	$ 7,228	$ 7,437	$ 9,077	$ 12,348	$ 10,425	$ 11,889	$ 11,351	$ 29,955	$ 46,013	$ 44,705