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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Payables and Accruals [Abstract] |  |
Accounts payable | $ 27,136 | $ 36,645
Accrued salaries and incentive compensation | 142,515 | 213,974
Accrued payroll taxes and benefits | 37,191 | 34,994
Accrued professional liabilities | 32,072 | 37,729
Accrued interest | 3,520 | 29,052
Accrued Contingent Consideration | 2,022 | 0
Other accrued expenses | 62,004 | 41,724
Accounts payable and accrued expenses, total | $ 306,460 | $ 394,118

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