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Organization, Nature of Operations and Basis of Presentation (Details) | 12 Months Ended
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Dec. 31, 2016 Clinic State Facility | Dec. 31, 2015 Clinic | Dec. 31, 2014 Clinic
Organization, Nature of Operations and Basis of Presentation [Abstract] |  |  |
Number of clinics operated | 540 |  |
Number of states where clinics are operated | State | 42 |  |
Number of third party facilities | Facility | 20 |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Percentage of general partnership interest owned | 1.00% |  |
Percentage of interest acquired in a single clinic | 60.00% |  |
Number of clinic practices acquired | 2 | 1 | 4
Minimum [Member] |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Percentage of limited partnership interest owned | 49.00% |  |
Maximum [Member] |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Percentage of limited partnership interest owned | 99.00% |  |

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