Note 15 - Significant Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 15,845	$ 17,413	$ 13,934
State	1,074	1,185	379
Foreign	1,591	2,149	1,762
Deferred
Federal	2,798	(1,821)	168
State	(38)	(17)	(39)
Foreign	294	130	(335)
Valuation Allowance	(217)	(143)	432
Total	$ 21,347	$ 18,896	$ 16,301