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Commitments and Contingencies - Litigation (Details) - Professional liability claims
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Joint Venture Operations  
Commitments and Contingencies  
Total annual aggregate limit of insurance coverage $ 80.0
Maximum  
Commitments and Contingencies  
Total annual aggregate limit of insurance coverage 40.0
Maximum | Joint Venture Operations  
Commitments and Contingencies  
Total annual aggregate limit of insurance coverage 33.0
Minimum | Joint Venture Operations  
Commitments and Contingencies  
Total annual aggregate limit of insurance coverage $ 23.0