Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Accounts payable	$ 34,588	$ 31,857
Accrued salaries and incentive compensation	193,112	197,831
Accrued payroll taxes and benefits	36,545	34,983
Accrued professional liabilities	32,039	32,232
Accrued interest	8,262	8,921
Other accrued expenses	46,252	68,401
Accounts payable and accrued expenses, total	$ 350,798	$ 374,225