Revenue Recognition (Net Provider Payments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue Recognition [Abstract]
Revenues, net of provider payments	$ 1.5	$ 2.1	$ 3.3	$ 4.7