Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) $ in Thousands	9 Months Ended
	Sep. 28, 2019 USD ($)
Finance leases:
Amortization of right-of-use assets	$ 19,196
Interest on lease liability	2,767
Total finance lease cost	21,963
Operating leases:
Lease cost	3,556
Variable lease cost
Sublease income	(3,931)
Total operating lease (income)/cost	(375)
Total lease cost	$ 21,588