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Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income from operations	$ 21,984	$ 16,402	$ 43,712	$ 34,084
Operating Segments [Member] | United States Segment [Member]
Income from operations	30,459	25,723	60,532	50,069
Operating Segments [Member] | Europe Segment [Member]
Income from operations	4,022	2,335	7,401	6,375
Corporate and Reconciling Items [Member] | Corporate Unallocated and Japan Segment[Member]
Income from operations	$ (12,497)	$ (11,656)	$ (24,221)	$ (22,360)

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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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