| **Basis of Presentation Basis of Presentation (Tables)**            | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Basis of Presentation [Abstract]**                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Concentration of Net Operating Revenues by Payor [Table Text Block] | During the three and nine months ended September 30, 2012 and 2011, we derived consolidated Net operating revenues from the following payor sources: Three Months Ended September 30, Nine Months Ended September 30, 2012 2011 2012 2011Medicare73.1% 72.0% 73.1% 71.8%Medicaid1.4% 1.6% 1.3% 1.7%Workers’ compensation1.5% 1.6% 1.5% 1.7%Managed care and other discount plans19.1% 20.0% 19.4% 19.8%Other third-party payors2.0% 1.9% 1.8% 2.0%Patients1.4% 1.3% 1.4% 1.2%Other income1.5% 1.6% 1.5% 1.8%Total100.0% 100.0% 100.0% 100.0% |

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| - Definition
Tabular disclosure of the concentration of net operating revenues by payor class as a percentage of total net operating revenues.
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No definition available.
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