Other Operating Income/(Expenses) (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Total other operating (income)/expenses	$ (371)	$ 91,138	$ 4,491
Potential Litigation Settlement [Member]
Total other operating (income)/expenses		90,000
Program Closure (Income)/Expenses [Member]
Total other operating (income)/expenses	$ (371)	$ 1,138
Retirement Expense [Member]
Total other operating (income)/expenses			$ 4,491