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Acquisitions of Businesses, 2022 Acquisition (Details)
$ in Millions
12 Months Ended
Nov. 30, 2022
USD ($)
Clinic
Oct. 31, 2022
USD ($)
Clinic
Sep. 30, 2022
USD ($)
Clinic
Aug. 31, 2022
USD ($)
Clinic
Mar. 31, 2022
USD ($)
Clinic
Dec. 31, 2021
USD ($)
Clinic
Jun. 30, 2021
USD ($)
Clinic
Mar. 31, 2021
USD ($)
Clinic
Nov. 30, 2020
USD ($)
Clinic
Feb. 27, 2020
USD ($)
Clinic
Dec. 31, 2022
USD ($)
Clinic
Dec. 31, 2021
USD ($)
Clinic
Business Combination, Description [Abstract]                        
Number of clinics | Clinic                     3 7
Contingent payment consideration           $ 3.5         $ 8.3 $ 3.5
Clinic Practice [Member]                        
Business Combination, Description [Abstract]                        
Percentage of interest acquired 80.00% 60.00% 80.00% 70.00% 70.00% 75.00% 65.00% 70.00% 75.00% 65.00%   75.00%
Number of clinics | Clinic 13 14 2 6 6 3 8 5 3 4    
Percentage of interest retained by practice founder 20.00% 40.00% 20.00% 30.00% 30.00% 25.00%           25.00%
Aggregate purchase price for the acquisition $ 25.0 $ 19.5 $ 4.2 $ 3.5 $ 11.5 $ 3.7 $ 10.3 $ 12.0 $ 8.9 $ 11.9    
Cash paid for acquisition 24.2   3.9 3.3 11.2 3.5 9.0 11.7 8.6 11.6    
Seller notes 0.8   $ 0.3 $ 0.2 $ 0.3 $ 0.2 0.3 $ 0.3 $ 0.3 $ 0.3   $ 0.2
Contingent payment consideration $ 1.3 $ 8.3         $ 0.8          
Percentage of interest accrued 7.00%   5.50% 5.50% 3.50% 3.25% 3.25% 3.25% 3.25% 4.75%   3.25%