Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 03, 2016	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Net sales	$ 619,716	$ 618,806	$ 614,683	$ 453,253	$ 440,638	$ 457,676	$ 459,473	$ 388,582	$ 2,306,458	$ 1,746,369	$ 1,641,331
Annapolis Make Ready Center [Member]
Net income, profit	3,300
Net income, net of tax	$ 2,000
Earning per basic common share	$ 0.22
Tennessee Gross Receipts [Member]
Net income, favorable pre-tax adjustment	$ 2,400
BYB Brands Inc [Member]
Net income, profit		22,700
Net income, net of tax		$ 13,900
Earning per basic common share		$ 1.50
Commodity Hedging Program [Member]
Net income, profit	1,200	$ 2,100
Net income, net of tax	$ 700	$ 1,300
Earning per basic common share	$ 0.08	$ 0.14
Asset Exchange Transaction [Member]
Net income, profit			8,800
Net income, net of tax			$ 5,400
Earning per basic common share			$ 0.58
Business Acquisition Contingent Consideration [Member]
Net income, profit		$ 4,000	$ 6,100	5,100	1,100
Net income, net of tax		$ 2,500	$ 3,700	$ 3,100	$ 700
Earning per basic common share		$ 0.26	$ 0.40	$ 0.34	$ 0.07
Expansion Transactions [Member]
Net income, profit	$ 5,800	$ 6,900	$ 4,300	$ 3,000	$ 5,200	2,600	3,100	2,000
Net income, net of tax	$ 3,600	$ 4,200	$ 2,600	$ 1,800	$ 3,200	$ 1,600	$ 1,900	$ 1,200
Earning per basic common share	$ 0.38	$ 0.46	$ 0.28	$ 0.20	$ 0.34	$ 0.17	$ 0.20	$ 13
2015 Expansion Territories and the 2014 Expansion Territories [Member]
Net sales	$ 143,200	$ 126,500	$ 114,000	$ 53,300	$ 29,000	$ 11,800	$ 4,300