Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortization of Intangible Assets	$ 12,481	$ 17,184	$ 10,437
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	4 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Weighted Average [Member]
Finite-Lived Intangible Asset, Useful Life	8 years 255 days
Weighted Average [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	8 years 255 days
Weighted Average [Member] | Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Asset, Useful Life	5 years 182 days