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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Payables and Accruals [Abstract] |  |
Accounts payable | $ 47,367 | $ 34,588
Accrued salaries and incentive compensation | 162,554 | 193,112
Accrued payroll taxes and benefits | 34,327 | 36,545
Accrued professional liabilities | 28,966 | 32,039
Accrued interest | 2,789 | 8,262
Other accrued expenses | 57,490 | 46,252
Accounts payable and accrued expenses, total | $ 333,493 | $ 350,798

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