Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) $ in Thousands	9 Months Ended
	Sep. 26, 2020 USD ($)
Finance leases:
Amortization of right-of-use assets	$ 18,534
Interest on lease liability	2,447
Total finance lease cost	20,981
Operating leases:
Lease cost	2,300
Sublease income	(3,513)
Total net operating lease income	(1,213)
Total net lease cost	$ 19,768