Organization, Nature of Operations and Basis of Presentation (Details)	12 Months Ended
	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%