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Organization and Summary of Accounting Policies - Variable Interest Entities (Details)
$ in Millions
Jun. 30, 2021
USD ($)
Jun. 30, 2021
surgical_facility
Jun. 30, 2021
physician_practice
Dec. 31, 2020
USD ($)
Variable Interest Entity [Line Items]        
Number of facilities included in VIE   3 2  
Assets $ 5,620.6     $ 5,413.2
Variable Interest Entity, Primary Beneficiary        
Variable Interest Entity [Line Items]        
Assets 26.2     27.7
Liabilities $ 19.9     $ 21.1