Note 11 - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 21,167	$ 2,577	$ 2,572
International	10,491	10,076	512
Total Current	31,658	12,653	3,084
Deferred:
Federal	8,350	22,005	(14,965)
International	206	(2,269)	(746)
Total Deferred	8,556	19,736	(15,711)
Total Income Tax Expense/ (Benefit)	$ 40,214	$ 32,389	$ (12,627)