Segment Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Revenue from External Customer [Line Items]
Net sales	$ 402,729	$ 394,495
Sandwiches [Member]
Revenue from External Customer [Line Items]
Net sales	119,878	123,819
Sandwich Components [Member]
Revenue from External Customer [Line Items]
Net sales	152,375	136,686
Other Entrees and Snacks [Member]
Revenue from External Customer [Line Items]
Net sales	$ 130,476	$ 133,990