Organization (Details)
 12 Months Ended
Oct. 06, 2015
USD ($)
Oct. 01, 2015
$ / shares
shares
Nov. 03, 2014
USD ($)
surgical_facility
Jun. 13, 2014
USD ($)
Dec. 31, 2016
USD ($)
Entity
surgical_facility
state
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
Sep. 30, 2015
shares
Jan. 27, 2014
USD ($)
Product Information [Line Items]                  
Common stock, shares issued (in shares) | shares         48,488,616 48,156,990      
Proceeds from initial public offering, net of offering costs | $         $ 0 $ 250,979,000 $ 0    
Number of business entities acquired | Entity         1        
Number of States in which entity operates | state         29        
Number of surgical facilities owned         104        
Number of surgical facilities owned, majority interest         74        
Number of surgical facilities owned, consolidated         94        
Facilities, Ambulatory Surgery Centers                  
Product Information [Line Items]                  
Number of surgical facilities owned         99        
Facilities, Surgical Hospitals                  
Product Information [Line Items]                  
Number of surgical facilities owned         5        
Facilities, Physician Clinics                  
Product Information [Line Items]                  
Number of surgical facilities owned         56        
Line of Credit                  
Product Information [Line Items]                  
Debt maximum borrowing capacity | $     $ 1,440,000,000.000           $ 90,000,000.0
Symbion Holdings Corporation                  
Product Information [Line Items]                  
Number of business entities acquired     55            
Aggregate purchase price | $     $ 711,288,000 $ 792,000,000          
Symbion Holdings Corporation | Facilities, Ambulatory Surgery Centers                  
Product Information [Line Items]                  
Number of business entities acquired     49            
Symbion Holdings Corporation | Facilities, Surgical Hospitals                  
Product Information [Line Items]                  
Number of business entities acquired     6            
IPO                  
Product Information [Line Items]                  
Stock issued during period (in shares) | shares   14,285,000              
Fair value of stock options granted (in USD per share) | $ / shares   $ 19.00              
Proceeds from initial public offering, net of offering costs | $ $ 255,800,000                
IPO, Underwriting Fees                  
Product Information [Line Items]                  
Issuance Costs | $ 15,600,000                
IPO, Directly Related Costs                  
Product Information [Line Items]                  
Issuance Costs | $ $ 4,800,000                
Surgery Center Holdings, LLC                  
Product Information [Line Items]                  
Common stock, shares issued (in shares) | shares               33,871,990