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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Payables and Accruals [Abstract] |  |
Accounts payable | $ 38,652 | $ 46,431
Accrued salaries and incentive compensation | 183,312 | 215,357
Accrued payroll taxes and benefits | 41,277 | 35,450
Accrued professional liabilities | 29,516 | 30,430
Accrued interest | 2,780 | 8,159
Other accrued expenses | 56,696 | 62,863
Accounts payable and accrued expenses, total | $ 352,233 | $ 398,690

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