Information Regarding Operations in Reportable Segments (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 08, 2016	Oct. 10, 2015	Oct. 08, 2016	Oct. 10, 2015
Segment Reporting Information [Line Items]
Sales		$ 918,791	$ 885,302	$ 3,058,168	$ 2,920,142
Depreciation and amortization		32,530	29,419	108,595	99,704
Income (loss) from operations		66,131	69,751	242,722	246,330
Interest expense		(9,440)	(5,992)	(26,157)	(20,349)
Interest income		4,757	5,114	15,686	17,029
Income before income taxes		61,448	68,873	232,251	243,010
Unallocated Corporate Costs
Segment Reporting Information [Line Items]
Depreciation and amortization	[1]	93	(58)	227	(319)
Income (loss) from operations	[1]	(12,511)	(15,445)	(42,455)	(46,405)
DSD Segment
Segment Reporting Information [Line Items]
Sales		768,920	746,267	2,553,690	2,464,399
DSD Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales		784,768	761,006	2,603,006	2,513,397
Depreciation and amortization		27,852	25,928	92,906	88,103
Income (loss) from operations		66,331	73,803	238,415	251,068
DSD Segment | Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales		(15,848)	(14,739)	(49,316)	(48,998)
Warehouse Segment
Segment Reporting Information [Line Items]
Sales		149,871	139,035	504,478	455,743
Warehouse Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales		182,706	169,190	615,798	560,935
Depreciation and amortization		4,585	3,549	15,462	11,920
Income (loss) from operations		12,311	11,393	46,762	41,667
Warehouse Segment | Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales		$ (32,835)	$ (30,155)	$ (111,320)	$ (105,192)

[1] Represents costs allocated to the company’s corporate head office.