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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. 30, 2018
Dec. 31, 2017
Jan. 01, 2017
Finite Lived Intangible Assets [Line Items]      
Other identifiable intangible assets, cost $ 25,288 $ 25,288  
Less: Accumulated amortization 8,806 6,968  
Total other identifiable intangible assets, net $ 16,482 $ 18,320 $ 10,427