Note 13 - Income Tax Provisions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Federal:
Current	$ 16,228	$ 11,153	$ 19,888	$ 14,067
Deferred	(1,025)	(3,998)	62	(2,660)
Total federal tax provision	15,203	7,155	19,950	11,407
Current	5,976	4,148	6,361	4,855
Deferred	(462)	(1,782)	21	(1,195)
Total state and local tax provision	5,514	2,366	6,382	3,660
Total income tax provision	$ 20,717	$ 9,521	$ 26,332	$ 15,067