Annual report pursuant to Section 13 and 15(d)

Nature of Business and Basis of Presentation (Details)

v3.22.4
Nature of Business and Basis of Presentation (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Nov. 01, 2021
USD ($)
$ / shares
shares
Oct. 13, 2021
USD ($)
Oct. 12, 2021
USD ($)
$ / shares
shares
Jan. 11, 2021
shares
Dec. 31, 2022
USD ($)
province
property
state
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]                
Number of centers | property         161      
Number of states in which entity operates | state         29      
Number of provinces in which entity operates | province         1      
Sale of Stock [Line Items]                
Sale of common stock (in shares) | shares           40,600,000 3,600,000  
Sale of common stock, net proceeds           $ 701.1 $ 90.0  
D-M Holdings                
Sale of Stock [Line Items]                
Ownership interest               50.00%
Common Stock                
Sale of Stock [Line Items]                
Stock issued upon conversion (in shares) | shares       6,700,000   6,687,000    
Issuance of restricted stock in connection with restricted series A preferred stock conversion (in shares) | shares     600,000   848,000 595,000    
Amended Senior Secured Credit Facility | Term Loan Facility, maturing December 2024                
Sale of Stock [Line Items]                
Repayments of debt   $ 575.7 $ 575.7          
Prepayment penalty   $ 5.7            
Series A Preferred Stock                
Sale of Stock [Line Items]                
Number of shares converted (in shares) | shares       5,400,000        
Shares converted (in shares) | shares     500,000          
IPO                
Sale of Stock [Line Items]                
Sale of common stock (in shares) | shares     39,000,000          
Sale of common stock, price (in usd per share) | $ / shares     $ 18.00          
Sale of common stock, gross proceeds     $ 702.0          
Underwriting discounts and other offering expenses     28.0   $ 0.3      
Sale of common stock, net proceeds     $ 674.0          
Underwriters option                
Sale of Stock [Line Items]                
Sale of common stock (in shares) | shares 1,600,000              
Sale of common stock, price (in usd per share) | $ / shares $ 18.00              
Sale of common stock, gross proceeds $ 28.4              
Underwriting discounts and other offering expenses 1.3              
Sale of common stock, net proceeds $ 27.1