Information Regarding Operations in Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 13, 2013		Jul. 14, 2012		Jul. 13, 2013		Jul. 14, 2012
Segment Reporting Information [Line Items]
Sales	$ 898,153		$ 681,561		$ 2,028,963		$ 1,579,767
Depreciation and amortization	25,743		22,255		59,932		51,994
Income from operations	74,850		47,417		226,054		106,634
Net interest expense	(2,700)		(2,935)		(7,255)		(2,959)
Income before income taxes	72,150		44,482		218,799		103,675
DSD segment
Segment Reporting Information [Line Items]
Sales	756,981		571,554		1,702,167		1,317,257
Sales	740,470		564,409		1,662,874		1,301,707
Depreciation and amortization	21,729		18,148		50,424		41,968
Income from operations	76,442		51,569		228,930		115,391
Warehouse segment
Segment Reporting Information [Line Items]
Sales	189,245		141,879		440,465		337,828
Sales	157,683		117,152		366,089		278,060
Depreciation and amortization	3,882		4,147		9,197		10,073
Income from operations	15,158		6,320		33,818		15,914
Sales From Warehouse Delivery To DSD
Segment Reporting Information [Line Items]
Sales	(31,562)		(24,727)		(74,376)		(59,768)
Sales From DSD To Warehouse Delivery
Segment Reporting Information [Line Items]
Sales	(16,511)		(7,145)		(39,293)		(15,550)
Unallocated Corporate Costs
Segment Reporting Information [Line Items]
Depreciation and amortization	132		(40)		311		(47)
Income from operations	$ (16,750)	[1]	$ (10,472)	[1]	$ (36,694)	[1]	$ (24,671)	[1]

[1] Represents the company's corporate head office amounts and acquisition costs.