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Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income from operations	$ 25,031	$ 19,367	$ 68,743	$ 53,451
Operating Segments [Member] | United States Segment [Member]
Income from operations	31,726	26,903	92,258	76,973
Operating Segments [Member] | Europe Segment [Member]
Income from operations	5,478	3,251	12,879	9,626
Corporate and Reconciling Items [Member] | Corporate Unallocated and Japan Segment[Member]
Income from operations	$ (12,173)	$ (10,787)	$ (36,394)	$ (33,148)

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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