Other Income/(Expense) - Net (Schedule Of Other Income/(Expense)- Net) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Income/(Expense) - Net [Abstract]
Market value adjustment on assets held in deferred compensation trust	$ 1,656	$ (2,328)	$ 1,857	$ (880)
Loss on disposal of property and equipment	(134)	(116)	(224)	(131)
Interest income - net	119	77	301	207
Other - net	(1)	12	(1)	(452)
Total other income/(expense) - net	$ 1,640	$ (2,355)	$ 1,933	$ (1,256)