Note 17 - Income Taxes - Components of Income Tax Expense (Benefit) from Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Current income tax expense
Federal	$ 4,363	$ 4,057	$ 10,958	$ 11,017
State	287	140	597	413
Total current income tax expense	4,650	4,197	11,555	11,430
Deferred income tax expense (benefit)
Federal	(692)	147	(302)	1,240
State	(75)	8	(18)	86
Total deferred income tax expense (benefit)	(767)	155	(320)	1,326
Change in valuation allowance
Total income tax expense	$ 3,883	$ 4,352	$ 11,235	$ 12,756