Income Taxes (Significant Components Of The Provision For Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Current
Federal							$ 2,208	$ 2,630
State							172	822
Foreign							3,675	2,460
Total current							6,055	5,912
Deferred
Federal							(55)	(798)
State							(8)	17
Foreign							(1,535)	(441)
Total deferred							(1,598)	(1,222)
Total income tax expense	$ 18	$ 728	$ 525	$ 66	$ 475	$ 431	$ 4,457	$ 4,690