Accounts Payable, Accrued Expenses and Other Liabilities - Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities, Noncurrent [Abstract]
Payroll taxes payable	$ 41,355	$ 31,055
Accrued compensation	278,399	35,103
Contingent consideration	32,065	28,099
Credit enhancement deposit	25,000	25,000
Financial guarantee liability	15	32	$ 54
Deferred rent		49,334
Other liabilities	$ 376,834	$ 168,623