Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortization of Intangible Assets, Total	$ 28,644	$ 22,112	$ 28,861
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	31,237
Finite-Lived Intangible Assets, Amortization Expense, Year Two	29,473
Finite-Lived Intangible Assets, Amortization Expense, Year Three	22,226
Finite-Lived Intangible Assets, Amortization Expense, Year Four	18,344
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 16,156