Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-lived assets:      
Intangible assets, beginning balance $ 53,568 $ 54,888  
Additions 4,754 8,584  
Disposals (135)    
Recruitment expense (609) (813)  
Amortization (9,555) (9,091) $ (5,200)
Intangible assets, ending balance 48,023 53,568 54,888
Physician Income Guarantees      
Finite-lived assets:      
Intangible assets, beginning balance 1,212 973  
Additions 210 1,052  
Disposals 0    
Recruitment expense (609) (813)  
Amortization 0 0  
Intangible assets, ending balance 813 1,212 973
Management Rights      
Finite-lived assets:      
Intangible assets, beginning balance 23,026 24,757  
Additions 0 0  
Disposals 0    
Recruitment expense 0 0  
Amortization (1,736) (1,731)  
Intangible assets, ending balance 21,290 23,026 24,757
Non-Compete Agreements      
Finite-lived assets:      
Intangible assets, beginning balance 18,571 16,590  
Additions 4,025 7,532  
Disposals 0    
Recruitment expense 0 0  
Amortization (6,139) (5,551)  
Intangible assets, ending balance 16,457 18,571 16,590
Certificates of Need      
Finite-lived assets:      
Intangible assets, beginning balance 3,711 3,711  
Additions 69 0  
Disposals 0    
Recruitment expense 0 0  
Amortization 0 0  
Intangible assets, ending balance 3,780 3,711 3,711
Customer Relationships      
Finite-lived assets:      
Intangible assets, beginning balance 4,936 6,274  
Additions 0 0  
Disposals (22)    
Recruitment expense 0 0  
Amortization (1,210) (1,338)  
Intangible assets, ending balance 3,704 4,936 6,274
Other      
Finite-lived assets:      
Intangible assets, beginning balance 2,112 2,583  
Additions 450 0  
Disposals (113)    
Recruitment expense 0 0  
Amortization (470) (471)  
Intangible assets, ending balance $ 1,979 $ 2,112 $ 2,583