Basis of Presentation and Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basis of Presentation and Significant Accounting Policies [Abstract]
Percentage reserved of all accounts aging over specified period from the date of discharge			100.00%
Number of days from the date of discharge over which all accounts are reserved 100%			365 days
Electronic health records incentive reimbursement	$ 30,622,000	$ 40,227,000	$ 73,592,000	$ 40,227,000
Reclassification in Current Year of Prior Year EHR Income, Amount			40,200,000
Electronic Health Records Incentive Reimbursement, Cash Received	12,800,000	6,500,000	41,600,000	6,500,000
Reimbursement Settlement and Payment Included in Net Operating Revenues			101,800,000
Unfavorable Adjustment Related To Newly Issued Supplemental Security Income Ratios			$ 21,000,000