Note 7 - Income Taxes - Federal and State Income Tax Expense (Benefit) Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal
State and local	2,730	1,259	996
State and local - reserve for uncertain tax positions	(698)	(581)	(198)
Current income tax expense (benefit)	2,032	678	798
Federal	38,214	24,067	28,231
State and local	3,172	1,703	2,707
Deferred income tax expense	41,386	25,770	30,938
Income tax expense as recorded	$ 43,418	$ 26,448	$ 31,736