Acquisitions and Divestitures - Schedule of Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Jan. 03, 2016	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Business Acquisition [Line Items]
Net sales	$ 841,560	$ 849,028	$ 840,384	$ 625,456	$ 619,716	$ 618,806	$ 614,683	$ 453,253	$ 3,156,428	$ 2,306,458	$ 1,746,369
Operating income									127,859	98,144	85,967
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | BYB Brands Inc [Member]
Business Acquisition [Line Items]
Net sales										23,875	34,089
Operating income										1,809	(357)
2014 Expansion Territories [Member]
Business Acquisition [Line Items]
Net sales									161,482	158,393	45,120
Operating income									4,933	3,553	3,417
2015 Expansion Territories & 2015 Asset Exchange [Member]
Business Acquisition [Line Items]
Net sales									469,440	278,691
Operating income									1,907	3,364
2016 Expansion Transactions [Member]
Business Acquisition [Line Items]
Net sales									592,329
Operating income									22,373
2014 and 2015 and 2016 Acquisitions, 2015 Asset Exchange [Member]
Business Acquisition [Line Items]
Net sales									1,223,251	437,084	45,120
Operating income									$ 29,213	$ 6,917	$ 3,417