Sales by Product Category in Each Reportable Segment (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
DSD Segment
Segment Reporting Information [Line Items]
Sales									3,179,348	3,155,607	3,080,255
Warehouse Segment
Segment Reporting Information [Line Items]
Sales									599,157	593,366	652,361
Branded Retail
Segment Reporting Information [Line Items]
Sales									2,150,624	2,102,028	2,038,726
Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales									2,010,792	1,971,851	1,898,016
Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales									139,832	130,177	140,710
Store Branded Retail
Segment Reporting Information [Line Items]
Sales									571,594	608,617	645,858
Store Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales									457,234	486,886	504,707
Store Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales									114,360	121,731	141,151
Non-Retail and Other
Segment Reporting Information [Line Items]
Sales									1,056,287	1,038,328	1,048,032
Non-Retail and Other | DSD Segment
Segment Reporting Information [Line Items]
Sales									711,322	696,870	677,532
Non-Retail and Other | Warehouse Segment
Segment Reporting Information [Line Items]
Sales									$ 344,965	$ 341,458	$ 370,500