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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Expense (Benefit), Total	$ 4,478		$ 5,489	$ 8,333	$ 11,286
Effective Income Tax Rate Reconciliation, Percent, Total	19.60%		31.20%	18.60%	31.70%
Effective Income Tax Rate, Increase (Decrease), Percentage	(11.60%)	(13.10%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%			21.00%
Unrecognized Tax Benefits, Ending Balance	$ 4,400			$ 4,400		$ 4,200

X

- Definition

The increase (decrease) in the effective income tax rate during the period.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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