Annual report pursuant to Section 13 and 15(d)

Nature of Business and Basis of Presentation (Details)

v3.22.0.1
Nature of Business and Basis of Presentation (Details)
$ / shares in Units, shares in Thousands, $ in Millions
1 Months Ended 12 Months Ended
Nov. 01, 2021
USD ($)
$ / shares
shares
Oct. 13, 2021
USD ($)
Oct. 12, 2021
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2021
USD ($)
province
property
state
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Apr. 30, 2019
Mar. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]                  
Number of centers | property         151        
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 3,600 4,300    
Underwriting discounts and other offering expenses           $ 0.2 $ 3.2    
Sale of common stock, net proceeds         $ 701.4 $ 90.0 $ 105.3    
Massage Retreat & Spa                  
Sale of Stock [Line Items]                  
Voting interests acquired               49.99%  
Massage Retreat & Spa                  
Sale of Stock [Line Items]                  
Voting equity interest                 50.01%
D-M Holdings                  
Sale of Stock [Line Items]                  
Ownership interest       50.00%   50.00% 50.00%    
Capital contributions to investment       $ 16.2 $ 0.4 $ 0.1      
Common Stock                  
Sale of Stock [Line Items]                  
Stock issued upon conversion (in shares) | shares     6,700   6,687        
Issuance of restricted stock in connection with restricted Series A Preferred Stock conversion (in shares) | shares     600   595        
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            
Shares converted (in shares) | shares     500            
IPO                  
Sale of Stock [Line Items]                  
Sale of common stock (in shares) | shares     39,000            
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     27.7            
Sale of common stock, net proceeds     $ 674.3            
Underwriters option                  
Sale of Stock [Line Items]                  
Sale of common stock (in shares) | shares 1,600                
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