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	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Finite Lived Intangible Assets [Line Items]
Total Other Identifiable Intangible Assets, Beginning Balance	$ 18,320	$ 10,427
System Transformation Transactions acquisitions		2,850
Additional accumulated amortization	(459)	(284)
Total Other Identifiable Intangible Assets, Ending Balance	$ 17,861	$ 12,993