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Accrued Payroll and Employee Benefits (Detail) - USD ($)
$ in Thousands
Dec. 29, 2017
Dec. 30, 2016
Employee Related Liabilities [Line Items]    
Accrued bonuses payable $ 44,752 $ 37,120
Accrued 401(k) contributions 7,691 7,440
Accrued vacation 9,707 9,177
Deferred compensation 6,274 7,114
Other accrued payroll and employee benefits 1,640 1,688
Total accrued payroll and employee benefits $ 70,064 $ 62,539