Aggregate Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 10, 2015	Oct. 04, 2014	Oct. 10, 2015	Oct. 04, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 3,359	$ 2,705	$ 9,644	$ 9,041