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Accrued Professional Liabilities - Additional Information (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Total accrued professional liability $ 308,800 $ 315,900
Accrued professional liability incurred but loss reserves not reported for claims 211,200 222,900
Accrued professional liability incurred and loss reserves reported for claims 97,600 93,000
Accrued professional liabilities 37,729 $ 50,607
Insurance receivables $ 58,100