Other Income/(Expense) - Net (Schedule Of Other Income/(Expense) - Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income/(Expense) - Net [Abstract]
Market value adjustment on assets held in deferred compensation trust	$ 3,655	$ 7,408	$ 6,693	$ (2,164)
Interest income	138	116	230	225
Other-net	(8)	(10)	464	(13)
Total other income/(expense) - net	$ 3,785	$ 7,514	$ 7,387	$ (1,952)