Income Taxes (Provision For (Benefit From) Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal	$ (90)	$ 22	$ 8,334
State	62	23	1,125
Foreign	1,988	1,471	963
Total current provision	1,960	1,516	10,422
Deferred
Federal	(3,449)	(1,650)	611
State	21	(996)	126
Foreign	(368)	68	46
Total deferred provision (benefit)	(3,796)	(2,578)	783
Provision for (benefit from) income taxes	$ (1,836)	$ (1,062)	$ 11,205