Note 10 - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal, current									$ 33,169	$ 32,364	$ 19,590
State, current									13,247	12,325	7,006
Subtotal, current									46,416	44,689	26,596
Deferred:
Federal, deferred									(3,353)	(110)	(3,881)
State, deferred									2,950	126	(3,614)
Subtotal, deferred									(403)	16	(7,495)
Income tax expense	$ 12,348	$ 10,425	$ 11,889	$ 11,351	$ 12,301	$ 10,881	$ 10,652	$ 10,871	$ 46,013	$ 44,705	$ 19,101