Note 12 - Income Taxes - Income Tax Provisions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Federal:
Federal tax provision, current	$ 3,755	$ 6,653	$ 6,165	$ 9,605
Federal tax provision, deferred	(444)	(1,077)	(247)	720
Total federal tax provision	3,311	5,576	5,918	10,325
State and Local:
State and local tax provision, current	1,499	1,618	1,689	1,419
State and local tax provision, deferred	(321)	(419)	(168)	285
Total state and local tax provision	1,178	1,199	1,521	1,704
Total income tax provision	$ 4,489	$ 6,775	$ 7,439	$ 12,029