Leases - Summary of Balances Related to Lease Portfolio within Condensed Consolidated Statement of Cash Flow (Parenthetical) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2019	[1]	Sep. 30, 2018
Leases [Abstract]
Principal payments on capital lease obligations	$ 6,441		$ 6,000
Interest payments on capital lease obligations	$ 2,083		$ 2,600

[1] During the first nine months of 2018, the Company had interest payments on capital lease obligations of $2.6 million and principal payments on capital lease obligations of $6.0 million.