Other Income Net (Schedule Of Other Income – Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income -- Net [Abstract]
Market value adjustment on assets held in deferred compensation trust	$ 8,310	$ 7,933	$ 8,254
Interest income	377	757	513
Other income/(expense)--net	457	(25)	(3)
Total other Income – Net	$ 9,144	$ 8,665	$ 8,764