Other Income - Net (Schedule Of Other Income —Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income—Net [Abstract]
Market value adjustment on assets held in deferred compensation trust	$ (130)	$ 779	$ 2,207	$ 1,638
Interest income	112	259	214	417
Other - net	31		31	1
Total other income - net	$ 13	$ 1,038	$ 2,452	$ 2,056