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Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Property Plant And Equipment [Abstract]    
Equipment $ 75,531 $ 70,126
Leasehold improvements 80,002 71,469
Property, Plant and Equipment, Gross, Total 155,533 141,595
Less: Accumulated depreciation and amortization (103,331) (93,617)
Property and equipment, net $ 52,202 $ 47,978