Information Regarding Operations in Reportable Segments (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 10, 2015	Oct. 04, 2014	Oct. 10, 2015	Oct. 04, 2014
Segment Reporting Information [Line Items]
Sales		$ 885,302	$ 844,932	$ 2,920,142	$ 2,871,640
Depreciation and amortization		29,419	29,487	99,704	98,686
Income (loss) from operations		69,751	70,381	246,330	233,963
Interest expense		(5,992)	(6,285)	(20,349)	(21,902)
Interest income		5,114	4,875	17,029	15,586
Income before income taxes		68,873	68,971	243,010	227,647
Intersegment Eliminations | Sales From Warehouse Segment To DSD Segment
Segment Reporting Information [Line Items]
Sales		(30,155)	(28,416)	(105,192)	(99,870)
Intersegment Eliminations | Sales From DSD Segment To Warehouse Segment
Segment Reporting Information [Line Items]
Sales		(14,739)	(13,768)	(48,998)	(58,971)
Unallocated Corporate Costs
Segment Reporting Information [Line Items]
Depreciation and amortization	[1]	(58)	3	(319)	(249)
Income (loss) from operations	[1]	(15,445)	(9,192)	(46,405)	(32,374)
DSD Segment
Segment Reporting Information [Line Items]
Sales		746,267	713,846	2,464,399	2,413,332
DSD Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales		761,006	727,614	2,513,397	2,472,303
Depreciation and amortization		25,928	26,015	88,103	87,286
Income (loss) from operations		73,803	67,740	251,068	226,935
Warehouse Segment
Segment Reporting Information [Line Items]
Sales		139,035	131,086	455,743	458,308
Warehouse Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales		169,190	159,502	560,935	558,178
Depreciation and amortization		3,549	3,469	11,920	11,649
Income (loss) from operations		$ 11,393	$ 11,833	$ 41,667	$ 39,402

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