Accrued Payroll and Employee Benefits (Detail) - USD ($) $ in Thousands	Dec. 30, 2016	Jan. 01, 2016
Employee Related Liabilities [Line Items]
Accrued bonuses payable	$ 37,120	$ 38,042
Accrued 401(k) contributions	7,440	7,323
Accrued vacation	9,177	8,836
Deferred compensation	7,114	6,418
Other accrued payroll and employee benefits	1,688	1,473
Total accrued payroll and employee benefits	$ 62,539	$ 62,092