Customer Lists and Other Identifiable Intangible Assets, Net - Other Identifiable Intangible Assets (Detail) - Customer Lists and Other Identifiable Intangible Assets [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Finite Lived Intangible Assets [Line Items]
Other identifiable intangible assets, cost	$ 25,288	$ 15,938
Less: Accumulated amortization	6,968	5,511
Total other identifiable intangible assets, net	$ 18,320	$ 10,427	$ 6,662