| **Basis of Presentation (Tables)**                                  | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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| **Basis of Presentation [Abstract]**                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Concentration of Net Operating Revenues by Payor [Table Text Block] | During the three months ended March 31, 2013 and 2012, we derived consolidated Net operating revenues from the following payor sources: Three Months Ended March 31, 2013 2012Medicare74.7% 73.5%Medicaid1.1% 1.1%Workers’ compensation1.3% 1.5%Managed care and other discount plans18.5% 19.3%Other third-party payors1.7% 1.7%Patients1.1% 1.4%Other income1.6% 1.5%Total100.0% 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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