Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense (Benefit), Total	$ 17,538	$ 15,067	$ 22,657
Effective Income Tax Rate Reconciliation, Percent, Total	21.60%	16.40%	30.40%
Effective Income Tax Rate Continuing Operations Increase (Decrease) During the Period	5.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	35.00%
Undistributed Earnings of Foreign Subsidiaries	$ 9,300
Operating Loss Carryforwards, Total	$ 6,500
Operating Loss Carryforwards, Expiration Period	10 years
Operating Loss Carryforwards, Percentage of Taxable Income	60.00%
Deferred Tax Assets, Valuation Allowance, Total	$ 8,248	$ 6,900
Unrecognized Tax Benefits, Ending Balance	$ 4,598	$ 4,096	$ 4,233