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Accrued Professional Liabilities - Schedule of Accrued Professional Liability (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]      
Balance at beginning of year $ 190,127 $ 174,803 $ 151,397
Liabilities recognized, offset by insurance receivable (2,692) (2,299) 3,922
Provision (adjustment) for losses related to Current year 53,180 56,016 45,674
Provision (adjustment) for losses related to Prior years (4,056) (14,231) (1,551)
Total provision for losses 49,124 41,785 44,123
Claim payments related to Current year (73) (59) (59)
Claim payments related to Prior years (36,925) (24,103) (24,580)
Total payments (36,998) (24,162) (24,639)
Balance at end of year $ 199,561 $ 190,127 $ 174,803