Summary of Consideration Paid Based on the Fair Value at the Acquisition Date (Detail) - USD ($) $ in Thousands	Oct. 13, 2015	Sep. 12, 2015	Dec. 30, 2017	Jan. 14, 2017	Dec. 31, 2016	Jan. 02, 2016
Business Acquisition [Line Items]
Property, plant, and equipment				$ 3,824
Financial assets				7,730
Goodwill			$ 464,777	$ 801	$ 465,578	$ 464,926
Alpine Valley Bread Company
Business Acquisition [Line Items]
Cash consideration paid	$ 109,340
Stock consideration paid	12,602
Total consideration paid	121,942
Property, plant, and equipment	15,614
Identifiable intangible assets	64,600
Financial assets	5,190
Net recognized amounts of identifiable assets acquired	85,404
Goodwill	$ 36,538
Dave’s Killer Bread
Business Acquisition [Line Items]
Cash consideration paid		$ 282,115
Property, plant, and equipment		9,359
Identifiable intangible assets		176,300
Deferred income taxes		(59,827)
Financial assets		10,203
Net recognized amounts of identifiable assets acquired		136,035
Goodwill		$ 146,080