Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Expense (Benefit), Total	$ 2,761	$ 4,639	$ 3,293	$ 8,168
Effective Income Tax Rate Reconciliation, Percent, Total	8.60%	12.80%	4.10%	9.50%
GILTI Income	$ 13,000	$ 18,400	$ 38,500	$ 46,200