Revenue Recognition (Schedule Of Medicare Cap Liability Activity) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Revenue Recognition [Abstract]
Beginning Balance January 1,	$ 1,165	$ 6,112
2015 measurement period		(165)
Payments	(618)	(4,782)
Ending Balance June 30,	$ 547	$ 1,165