Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Federal	$ 26	$ (531)	$ 312
State	113	86	56
Foreign	282	531	2,338
Current income tax expense (benefit)	421	86	2,706
Federal	1,415	(19,304)	3,090
State	(528)	3,172	238
Foreign	1,579	1,185	(2,190)
Deferred income tax expense (benefit)	2,466	(14,947)	1,138
Total income tax expense (benefit)	$ 2,887	$ (14,861)	$ 3,844