Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Amortization of Intangible Assets	$ 6,657	$ 4,242	$ 12,224	$ 8,130
Finite-Lived Intangible Assets, Amortization Expense, Year Two	16,400		16,400
Finite-Lived Intangible Assets, Amortization Expense, Year Three	13,800		13,800
Finite-Lived Intangible Assets, Amortization Expense, Year Four	10,800		10,800
Finite-Lived Intangible Assets, Amortization Expense, Year Five	7,100		7,100
Finite-Lived Intangible Assets, Amortization Expense, Year Six	$ 4,900		4,900
Goodwill, Impairment Loss			0
Impairment of Intangible Assets (Excluding Goodwill)			$ 0