Note 10 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortization of Intangible Assets	$ 16,596	$ 11,982	$ 8,297
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	16,300
Finite-Lived Intangible Assets, Amortization Expense, Year Two	11,500
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	6,100
Finite-Lived Intangible Assets, Amortization Expense, Year Five	3,200
Goodwill, Impairment Loss	0	0	0
Impairment of Intangible Assets (Excluding Goodwill)	$ 0	$ 0	$ 0