Information Regarding Operations in Reportable Segments (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 18, 2015	Jul. 12, 2014	Jul. 18, 2015	Jul. 12, 2014
Segment Reporting Information [Line Items]
Sales		$ 888,795	$ 872,791	$ 2,034,840	$ 2,026,708
Depreciation and amortization		30,468	29,907	70,285	69,199
Income (loss) from operations		80,041	65,381	176,579	163,582
Interest expense		(5,998)	(6,494)	(14,357)	(15,618)
Interest income		5,138	4,760	11,915	10,712
Income before income taxes		79,181	63,647	174,137	158,676
Intersegment Eliminations | Sales From Warehouse Segment To DSD Segment
Segment Reporting Information [Line Items]
Sales		(30,186)	(31,951)	(75,038)	(71,454)
Intersegment Eliminations | Sales From DSD Segment To Warehouse Segment
Segment Reporting Information [Line Items]
Sales		(13,853)	(18,290)	(34,259)	(45,203)
Unallocated Corporate Costs
Segment Reporting Information [Line Items]
Depreciation and amortization		(118)	(104)	(261)	(252)
Income (loss) from operations	[1]	(12,006)	(10,492)	(30,960)	(23,182)
DSD Segment
Segment Reporting Information [Line Items]
Sales		751,969	736,364	1,718,132	1,699,486
DSD Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales		765,822	754,654	1,752,391	1,744,689
Depreciation and amortization		26,995	26,487	62,175	61,271
Income (loss) from operations		78,071	62,413	177,265	159,195
Warehouse Segment
Segment Reporting Information [Line Items]
Sales		136,826	136,427	316,708	327,222
Warehouse Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales		167,012	168,378	391,746	398,676
Depreciation and amortization		3,591	3,524	8,371	8,180
Income (loss) from operations		$ 13,976	$ 13,460	$ 30,274	$ 27,569

[1] Represents the company’s corporate head office amounts.