Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Payables and Accruals [Abstract]
Accounts payable	$ 27,849	$ 37,220
Accrued salaries and incentive compensation	146,500	248,058
Accrued payroll taxes and benefits	30,949	39,620
Accrued professional liabilities	35,916	35,176
Accrued interest	8,150	8,151
Other accrued expenses	52,473	51,305
Accounts payable and accrued expenses, total	$ 301,837	$ 419,530