Accumulated Other Comprehensive Income Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax	$ 270		$ 270		$ 433	$ (275)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(55,070)		(55,070)		(54,901)	(46,187)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(54,800)		(54,800)		$ (54,468)	$ (46,462)
Unrealized gain (loss) on available-for-sale investments, net of tax (benefit)	(163)		545
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(169)		(8,883)
Other Comprehensive Income Loss Arising During Period Total Net of Tax	(332)		(8,338)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	(163)	$ (2)	545	$ 558
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(169)	(1,177)	(8,883)	(686)
Other Comprehensive Income (Loss), Net of Tax	$ (332)	$ (1,179)	$ (8,338)	$ (128)