Leases - Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Lessee Lease Description [Line Items]
Total lease cost	$ 15,092	$ 14,499
Occupancy and General and Administrative Expenses [Member]
Lessee Lease Description [Line Items]
Operating lease cost	11,770	10,995
Occupancy Expenses [Member]
Lessee Lease Description [Line Items]
Variable lease cost	$ 3,322	$ 3,504