Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Amortization of Intangible Assets	$ 5,567	$ 3,888
Finite-Lived Intangible Assets, Amortization Expense, Year Two	14,500
Finite-Lived Intangible Assets, Amortization Expense, Year Three	12,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	9,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	5,300
Finite-Lived Intangible Assets, Amortization Expense, Year Six	3,100
Goodwill, Impairment Loss	0	0
Impairment of Intangible Assets (Excluding Goodwill)	$ 0	$ 0