Note 13 - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal	$ 13,356	$ 13,583	$ 23,038
State	1,101	1,612	2,150
Total current tax provision	14,457	15,195	25,188
Federal	4,048	610	(6,548)
State	1,534	380	227
Total deferred tax provision	5,582	990	(6,321)
Effective income tax expense	$ 20,039	$ 16,185	$ 18,867