Accounts Payable, Accrued Expenses and Other Liabilities - Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other Liabilities Noncurrent [Abstract]
Deferred rent	$ 41,841	$ 41,875
Payroll taxes payable	47,777	48,248
Accrued compensation	32,540	31,411
Credit enhancement deposit	25,000	25,000
Business acquisition, contingent cash consideration	15,971	17,207
Financial guarantee liability	61	54
Other liabilities	$ 163,190	$ 163,795