Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Federal	$ 5	$ 2	$ (563)
State	89	98	82
Foreign	364	282	536
Current income tax expense (benefit)	458	382	55
Federal	2,486	1,859	(8,755)
State	396	734	826
Foreign	852	1,579	1,180
Deferred income tax expense (benefit)	3,734	4,172	(6,749)
Total income tax expense (benefit)	$ 4,192	$ 4,554	$ (6,694)