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Organization, Nature of Operations and Basis of Presentation (Details) | 12 Months Ended
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Dec. 31, 2015 Clinic State Facility | Dec. 31, 2014 Clinic | Dec. 31, 2013 Clinic
Organization, Nature of Operations and Basis of Presentation [Abstract] |  |  |
Number of clinics operated | 508 |  |
Number of states where clinics are operated | State | 42 |  |
Number of third party facilities | Facility | 21 |  |
Percentage of general partnership interest owned | 1.00% |  |
Minimum percentage of limited partnership interest owned | 49.00% |  |
Maximum percentage of limited partnership interest owned | 94.00% |  |
Percentage of interest acquired in a single clinic | 60.00% |  |
Number of clinic practices acquired |  | 4 | 3

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