Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 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
Commodity Hedging Program [Member]
Pre-tax total income/(expense)	$ 531	$ 388	$ 2,770	$ 1,039	$ (1,203)	$ (2,130)	$ (749)	$ 643
Income/(expenses) net of tax	$ 327	$ 239	$ 1,701	$ 641	$ (739)	$ (1,308)	$ (460)	$ 395
Income/(expenses) per basic common shares	$ 0.04	$ 0.03	$ 0.18	$ 0.06	$ (0.08)	$ (0.14)	$ (0.05)	$ 0.05
2016 Expansion Transactions, 2015 Expansion Territories and 2015 Asset Exchange Impact [Member]
Net sales impact	$ 333,897	$ 298,313	$ 287,092	$ 142,467
Pre-tax income/(loss) impact	4,587	2,432	15,974	1,287
Net income/(loss) impact	$ 2,821	$ 1,495	$ 9,808	$ 808
Income/(expenses) per basic common shares	$ 0.30	$ 0.16	$ 1.05	$ 0.09
Expansion Transactions [Member]
Pre-tax total expense or total adjustment or gain	$ 9,066	$ 9,780	$ 7,005	$ 6,423	$ 5,789	$ 6,947	$ 4,252	$ 2,994
Expenses net of tax or adjustment or gain	$ 5,576	$ 6,015	$ 4,301	$ 3,957	$ 3,554	$ 4,265	$ 2,611	$ 1,839
Expenses per basic common shares or adjustment or gain	$ 0.60	$ 0.64	$ 0.46	$ 0.43	$ 0.38	$ 0.46	$ 0.28	$ 0.20
2015 Expansion Territories and 2015 Asset Exchange Impact [Member]
Net sales impact					$ 103,371	$ 89,762	$ 85,232	$ 31,622
Pre-tax income/(loss) impact					(2,399)	1,020	5,067	2,899
Net income/(loss) impact					$ (1,473)	$ 626	$ 3,112	$ 1,780
Income/(expenses) per basic common shares					$ (0.16)	$ 0.07	$ 0.34	$ 0.18
Annapolis Make Ready Center [Member]
Pre-tax total expense or total adjustment or gain					$ 3,276
Expenses net of tax or adjustment or gain					$ 2,011
Expenses per basic common shares or adjustment or gain					$ 0.22
Special Charitable Contribution [Member]
Pre-tax total expense or total adjustment or gain				$ 4,000
Expenses net of tax or adjustment or gain				$ 2,460
Expenses per basic common shares or adjustment or gain				$ 0.26
Exchange of Franchise Territories [Member]
Pre-tax total adjustment, reduction of gain			$ 692
Adjustment net of tax, reduction of gain			$ 426
Expenses per basic common shares or adjustment or gain			$ 0.05
Asset Exchange Transaction [Member]
Pre-tax total expense or total adjustment or gain							$ 8,807
Expenses net of tax or adjustment or gain							$ 5,407
Expenses per basic common shares or adjustment or gain							$ 0.58
BYB Brands Inc [Member]
Pre-tax total expense or total adjustment or gain						$ 22,651
Expenses net of tax or adjustment or gain						$ 13,908
Expenses per basic common shares or adjustment or gain						$ 1.49
Results of 53rd Week in Fiscal Year [Member]
Net sales impact					$ 38,587
Pre-tax income/(loss) impact					4,022
Net income/(loss) impact					$ 2,416
Income/(expenses) per basic common shares					$ 0.26
Business Acquisition Contingent Consideration [Member]
Pre-tax total income/(expense)	$ 27,970	$ 7,365	$ (16,274)	$ (17,151)	$ (573)	$ (3,992)	$ 6,078	$ (5,089)
Income/(expenses) net of tax	$ 17,202	$ 4,530	$ (9,992)	$ (10,565)	$ (352)	$ (2,451)	$ 3,732	$ (3,125)
Income/(expenses) per basic common shares	$ 1.85	$ 0.48	$ (1.07)	$ (1.13)	$ (0.04)	$ (0.26)	$ 0.40	$ (0.34)
Tennessee Gross Receipts [Member]
Net income, favorable pre-tax adjustment					$ 2,400