Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Rent expense on operating leases	$ 87,570	$ 76,644	$ 60,479
Contingent rental expense	2,008	1,556	2,201
Interest expense	1,971	1,664	$ 1,610
Deduction in general insurance policy liability per claim	150
Workers compensation	300
Accrued claims related to self insurance general liability and workers compensation insurance liability	$ 2,437	$ 2,416