Asset Impairment (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Goodwill [Line Items]
Goodwill, Impairment Loss		$ 314,700,000
Impairment of Intangible Assets (Excluding Goodwill)		2,400,000
Historical Revenue Growth - lower		1.40%		1.40%
Historical Revenue Growth - Upper		6.20%		6.20%
Historical Expense Growth - lower		2.90%		2.90%
Historical Expense Growth - upper		5.60%		5.60%
Fair Value Inputs, Discount Rate		10.50%
Prospective net decrease in Medicare Reimbursement rates		11.10%		11.10%
Market basket increase		2.70%		2.70%
Productivity adjustment		(1.00%)		(1.00%)
Parity Adjustment		(12.60%)		(12.60%)
Loss on asset impairment	$ 0	$ 317,091,000	$ 0	$ 317,091,000