Related Party Transactions - Summary of Rental Payments Related to Capital Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Beacon Investment Corporation [Member]
Related Party Transaction [Line Items]
Rental payments related to capital leases	$ 1,110	$ 1,091	$ 3,346	$ 3,294
HLP, SPC & Adjacent Sales Facility [Member]
Related Party Transaction [Line Items]
Rental payments related to capital leases	$ 1,049	$ 1,018	$ 3,147	$ 3,055