Other Income - Net (Schedule Of Other Income -Net) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income-Net [Abstract]
Market value adjustment on assets held in deferred compensation trust	$ 2,338	$ 860
Interest income	101	158
Total other income - net	$ 2,439	$ 1,018