Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accounts payable	$ 26,944	$ 12,784
Accrued payroll and employee benefits	46,705	59,364
Accrued insurance	6,819	16,154
Accrued occupancy costs	3,541	3,121
Accrued professional fees	2,575	2,169
Accrued interest	869	1,004
Other accrued expenses	27,323	21,829
Accounts payable and accrued expenses	$ 114,776	$ 116,425