Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Finance leases:
Amortization of right-of-use assets	$ 25,298,000
Interest on lease liability	3,654,000
Total finance lease cost	28,952,000
Operating leases:
Lease cost	4,726,000
Sublease income	(5,216,000)	$ (868,000)	$ (1,419,000)
Total operating lease (income)/cost	(490,000)
Total lease cost	$ 28,462,000