Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
Accounts payable	$ 37,220	$ 46,431
Accrued salaries and incentive compensation	248,058	215,357
Accrued payroll taxes and benefits	39,620	35,450
Accrued professional liabilities	35,176	30,430
Accrued interest	8,151	8,159
Other accrued expenses	51,305	62,863
Accounts payable and accrued expenses, total	$ 419,530	$ 398,690