Revenue Recognition (Net Provider Payments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue Recognition [Abstract]
Revenues, net of provider payments	$ 1.7	$ 2.1	$ 5.0	$ 6.8