Other Operating (Income)/ Expenses (Schedule Of Other Operating (Income)/ Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Total other operating (income)/expenses	$ (51)	$ 873
Gain On Disposal Of Fixed Assets [Member]
Total other operating (income)/expenses	$ (51)
Program Closure Expenses [Member]
Total other operating (income)/expenses		$ 873