Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) $ in Thousands	6 Months Ended
	Jun. 27, 2020 USD ($)
Finance leases:
Amortization of right-of-use assets	$ 12,372
Interest on lease liability	1,689
Total finance lease cost	14,061
Operating leases:
Lease cost	1,518
Sublease income	(2,413)
Total operating lease (income)/cost	(895)
Total lease cost	$ 13,166