Note 23 - Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal income tax expense, current	$ 2,005	$ 283	$ 1,183
Federal income tax expense, deferred	2,837	409	509
Federal income tax expense, total	4,842	692	1,692
State income tax expense, current	1,474	582	981
State income tax expense, deferred	(76)	86	75
State income tax expense, total	1,398	668	1,056
Affordable housing partnership amortization, current	688	598	714
Income tax expense, current	4,167	1,463	2,878
Income tax expense, deferred	2,761	495	584
Income tax expense, total	$ 6,928	$ 1,958	$ 3,462