Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Accounts payable	$ 35,333	$ 31,857
Accrued salaries and incentive compensation	67,767	197,831
Accrued payroll taxes and benefits	28,355	34,983
Accrued professional liabilities	26,062	32,232
Accrued interest	3,235	8,921
Other accrued expenses	65,923	68,401
Accounts payable and accrued expenses, total	$ 226,675	$ 374,225