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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Payables and Accruals [Abstract]    
Accounts payable $ 30,315 $ 36,645
Accrued salaries and incentive compensation 75,419 213,974
Accrued payroll taxes and benefits 29,628 34,994
Accrued professional liabilities 34,042 37,729
Accrued interest 3,205 29,052
Other accrued expenses 59,480 41,724
Accounts payable and accrued expenses, total $ 232,089 $ 394,118