Information Regarding Operations in Reportable Segments (Detail) - USD ($) $ in Thousands		3 Months Ended						4 Months Ended		12 Months Ended
		Jan. 02, 2016	Oct. 10, 2015	Jul. 18, 2015	Jan. 03, 2015	Oct. 04, 2014	Jul. 12, 2014	Apr. 25, 2015	Apr. 19, 2014	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Segment Reporting Information [Line Items]
Sales		$ 858,363	$ 885,302	$ 888,795	$ 877,333	$ 844,932	$ 872,791	$ 1,146,045	$ 1,153,917	$ 3,778,505	$ 3,748,973	$ 3,732,616
Depreciation and amortization										132,175	128,961	118,491
Income (loss) from operations										297,879	275,395	335,233
Interest expense										26,815	28,288	28,875
Interest income										(21,967)	(20,947)	(16,015)
Income before income taxes										293,031	268,054	322,373
Capital expenditures										90,773	83,778	99,181
Other
Segment Reporting Information [Line Items]
Depreciation and amortization	[1]									(360)	(86)	667
Income (loss) from operations	[1]									(59,748)	(60,287)	(63,815)
Capital expenditures	[1]									9,029	3,856	10,466
DSD Segment
Segment Reporting Information [Line Items]
Sales										3,179,348	3,155,607	3,080,255
DSD Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales										3,242,482	3,227,695	3,171,241
Depreciation and amortization										115,801	113,881	102,341
Income (loss) from operations	[2]									302,361	284,231	347,114
Capital expenditures										72,148	73,454	81,664
DSD Segment | Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales										(63,134)	(72,088)	(90,986)
Warehouse Segment
Segment Reporting Information [Line Items]
Sales										599,157	593,366	652,361
Warehouse Segment | Operating Segments
Segment Reporting Information [Line Items]
Sales										733,170	723,541	774,443
Depreciation and amortization										16,734	15,166	15,483
Income (loss) from operations										55,266	51,451	51,934
Capital expenditures										9,596	6,468	7,051
Warehouse Segment | Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales										$ (134,013)	$ (130,175)	$ (122,082)

[1] Represents the company’s corporate head office amounts, acquisition costs, and the fiscal 2014 pension settlement loss.

[2] Includes the gain on acquisition of $50.1 million in fiscal 2013.