Customer Lists and Other Identifiable Intangible Assets, Net - Reconciliation of Activity for Other Identifiable Intangible Assets (Detail) - Customer Lists and Other Identifiable Intangible Assets [Member] - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016
Finite Lived Intangible Assets [Line Items]
Total Other Identifiable Intangible Assets, Beginning Balance	$ 10,427	$ 6,662
Expansion Transactions	3,800	2,000
Additional accumulated amortization	(965)	(588)
Total Other Identifiable Intangible Assets, Ending Balance	$ 13,262	$ 8,074