Acquisitions and Divestitures - Additional Information (Detail) - USD ($) $ in Thousands					3 Months Ended		9 Months Ended
	Aug. 24, 2015	May. 01, 2015	Feb. 27, 2015	Jan. 30, 2015	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Jun. 28, 2015	Dec. 29, 2014	Dec. 28, 2014	Oct. 24, 2014	Oct. 17, 2014	Jun. 29, 2014	May. 23, 2014	Dec. 30, 2013
Business Acquisition [Line Items]
Goodwill					$ 113,835	$ 103,294	$ 113,835	$ 103,294			$ 106,220
Cash purchase							52,739	12,163
Net sales					618,806	457,676	1,686,742	1,305,731
Operating Income					27,685	28,446	82,903	71,826
Contingent consideration liability					93,064	13,000	93,064	13,000	$ 94,068	$ 46,850				$ 13,000		$ 0
Unfavorable fair value adjustment to contingent consideration liability					3,992	0	3,003	0
Gain on exchange of franchise territory					0	0	8,807	0
Gain on sale of business					22,651	0	22,651	0
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Exchange [Member] | Jackson Territory [Member]
Business Acquisition [Line Items]
Carrying value of assets exchanged		$ 17,500
Gain on exchange of franchise territory		8,800
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | BYB Brands Inc [Member]
Business Acquisition [Line Items]
Net sales							21,800	24,500
Operating Income							$ 1,800	$ 300
Cash purchase price on sale of brands	$ 26,400
Gain on sale of business	$ 22,700
Johnson City And Morristown Territory Acquisition [Member]
Business Acquisition [Line Items]
Effective date of business acquisition								May 23, 2014
Goodwill						600		$ 600							$ 557
Goodwill recognized, expected to be deductible for tax purposes						100		$ 100
Knoxville Tennessee Territory Acquisition [Member]
Business Acquisition [Line Items]
Effective date of business acquisition								Oct. 24, 2014
Goodwill						4,700		$ 4,700				$ 4,684
Goodwill recognized, expected to be deductible for tax purposes						$ 4,500		$ 4,500
Cleveland and Cookeville, Tennessee Territory Acquisitions [Member]
Business Acquisition [Line Items]
Effective date of business acquisition							Jan. 30, 2015
Goodwill				$ 1,238
Goodwill recognized, expected to be deductible for tax purposes				200
Cash purchase				$ 13,800
Louisville, Kentucky and Evansville, Indiana [Member]
Business Acquisition [Line Items]
Effective date of business acquisition							Feb. 27, 2015
Goodwill			$ 4,042
Goodwill recognized, expected to be deductible for tax purposes			2,100
Cash purchase			$ 19,800
Paducah And Pikeville Kentucky Territory Acquisitions [Member]
Business Acquisition [Line Items]
Effective date of business acquisition							May 01, 2015
Goodwill		952
Goodwill recognized, expected to be deductible for tax purposes		100
Cash purchase		7,500
2015 Acquisitions [Member]
Business Acquisition [Line Items]
Net sales					84,700		$ 175,200
Operating Income					1,300		5,700
Asset Purchase Agreements [Member]
Business Acquisition [Line Items]
Contingent consideration liability					93,100		93,100
Contingent consideration liability range, low					6,000		6,000
Contingent consideration liability range, high					$ 11,000		11,000
Unfavorable fair value adjustment to contingent consideration liability							$ 3,000
Lexington Expansion [Member]
Business Acquisition [Line Items]
Effective date of business acquisition							May 01, 2015
Goodwill		2,533
Goodwill recognized, expected to be deductible for tax purposes		$ 2,500
Asset Exchange Transaction [Member]
Business Acquisition [Line Items]
Net asset value after deducting retained assets and liabilities													$ 10,300