Revenue Recognition (Schedule Of Medicare Cap Liability Activity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue Recognition [Abstract]
Beginning Balance January 1,	$ 1,165	$ 6,112
2015 measurement period		(165)
Payments	$ (618)	(4,566)
Ending Balance March 31,	$ 547	$ 1,381