Note 3 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Current:
Domestic	$ 4,123	$ (4,776)	$ 4,122	$ (2,911)
Foreign	5,773	451	8,416	606
Total current income tax provision (benefit)	9,896	(4,325)	12,538	(2,305)
Deferred:
Domestic	(5,723)	1,812	3,642	5,400
Foreign	5,280	(2,987)	6,423	(7,288)
Total deferred income tax provision (benefit)	(443)	(1,175)	10,065	(1,888)
Total income tax provision (benefit)	$ 9,453	$ (5,500)	$ 22,603	$ (4,193)