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Commitments and Contingencies (Details) (USD $) | Sep. 30, 2012 | Dec. 31, 2011 | Nov. 15, 2010 | Nov. 15, 2010 Maximum [Member] | Nov. 15, 2010 Minimum [Member] | Sep. 30, 2012 Illinois [Member] | Dec. 31, 2011 Illinois [Member] | Sep. 30, 2012 Puerto Rico [Member] | Sep. 30, 2012 Location 1 [Member] Minimum [Member] | Sep. 30, 2012 Location 2 [Member] Minimum [Member] | Sep. 30, 2012 Wind Storms [Member] | Sep. 30, 2012 Wind Storms [Member] Maximum [Member] | Sep. 30, 2012 Wind Storms [Member] Minimum [Member] | Sep. 30, 2012 Earthquake [Member] | Sep. 30, 2012 Earthquake [Member] United States [Member] | Sep. 30, 2012 Earthquake [Member] United States [Member] Maximum [Member] | Sep. 30, 2012 Earthquake [Member] United States [Member] Minimum [Member] | Sep. 30, 2012 Flood [Member] Location 1 [Member] Maximum [Member] | Sep. 30, 2012 Flood [Member] Location 2 [Member] Maximum [Member] | Sep. 30, 2012 Self Insurance Programs [Member] | Sep. 30, 2012 Other debt and public utility guarantees [Member] | Nov. 15, 2010 Subsidiaries [Member] Maximum [Member] | Jan. 01, 2008 Subsidiaries [Member] Maximum [Member] | Jan. 01, 2008 Subsidiaries [Member] Minimum [Member] | Sep. 30, 2012 Psychiatric Solutions Inc [Member] Maximum [Member] | Sep. 30, 2012 Psychiatric Solutions Inc [Member] Minimum [Member] | Nov. 14, 2010 Psychiatric Solutions Inc [Member] Minimum [Member] | Nov. 15, 2010 Legacy Subsidiaries [Member] Maximum [Member]
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Commitments and Contingencies (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability | $ 300,000,000 | $ 292,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 | $ 75,000,000 | $ 3,000,000 | $ 3,000,000 | $ 10,000,000
Purchased several excess policies through commercial insurance carriers per occurrence |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 | 200,000,000 |  |  |  |  |
Percentage of liability for claims paid under commercially insured coverage |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for claims paid under commercially insured coverage |  |  |  | 60,000,000 | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Self-insured for professional and general liability, current | 60,000,000 | 60,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial property insurance policies covering catastrophic losses |  |  |  |  |  |  |  | 25,000,000 |  |  |  | 1,000,000,000 |  | 250,000,000 | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum insurance deductible |  |  |  |  |  |  |  |  |  |  | 250,000 |  |  |  |  |  |  | 250,000 | 500,000 |  |  |  |  |  |  |  |  |
Minimum Insurance Deductible |  |  |  |  |  |  |  |  | 50,000 | 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of insurance deductible |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 3.00% |  |  | 5.00% | 1.00% |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, net | 1,042,535,000 | 969,802,000 |  |  |  | 76,000,000 | 54,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable net greater than sixty days Past due | 55,000,000 | 41,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Off-balance sheet contingent obligation | $ 81,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 66,000,000 | $ 15,000,000 |  |  |  |  |  |  |

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