Statements of Comprehensive Income (Loss) Statement - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Income (Loss) Attributable to Parent	$ 7,601	$ 6,027	$ 21,540	$ 7,875
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	29	(5)	23	(6)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	596	9	1,234	456
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 8,226	$ 6,031	$ 22,797	$ 8,325