Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Federal	$ (600)	$ 122	$ 210
State	447	89	98
Foreign	584	364	282
Current income tax expense (benefit)	431	575	590
Federal	3,380	2,960	2,186
State	(2,686)	396	734
Foreign	675	852	1,579
Deferred income tax expense (benefit)	1,369	4,208	4,499
Total income tax expense (benefit)	$ 1,800	$ 4,783	$ 5,089