Income Taxes (Schedule Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Current: Federal	$ 521	$ 3,948	$ 231
Current: State	110	626	142
Current: Foreign	460	353	160
Current: Income tax expense	1,091	4,927	533
Deferred: Federal	(714)	2,836	1,011
Deferred: State	70	(9)	319
Deferred: Foreign	(590)	(120)
Deferred: Income tax expense	(1,234)	2,707	1,330
Income tax (benefit) expense	$ (143)	$ 7,634	$ 1,863