Note 6 - Goodwill and Other Intangible Assets, Net Schedule of Future Amortization Expense for Finite Lived Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 7,569
Finite-Lived Intangible Assets, Amortization Expense, Year Two	8,790
Finite-Lived Intangible Assets, Amortization Expense, Year Three	7,412
Finite-Lived Intangible Assets, Amortization Expense, Year Four	5,833
Finite-Lived Intangible Assets, Amortization Expense, Year Five	5,081
Finite-Lived Intangible Assets, Amortization Expense, Year Five	4,428
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	11,430
Finite-Lived Intangible Assets, Net	$ 50,543
Finite-Lived Intangible Assets, Remaining Amortization Period	15 years