Sales by Product Category in Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 31, 2016	Oct. 08, 2016	Jul. 16, 2016	Jan. 02, 2016	Oct. 10, 2015	Jul. 18, 2015	Apr. 23, 2016	Apr. 25, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Segment Reporting Information [Line Items]
Sales	$ 868,717	$ 918,791	$ 935,025	$ 858,363	$ 885,302	$ 888,795	$ 1,204,352	$ 1,146,045	$ 3,926,885	$ 3,778,505	$ 3,748,973
DSD Segment
Segment Reporting Information [Line Items]
Sales									3,284,177	3,179,348	3,155,607
Warehouse Segment
Segment Reporting Information [Line Items]
Sales									642,708	599,157	593,366
Branded Retail
Segment Reporting Information [Line Items]
Sales									2,282,892	2,151,514	2,102,028
Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales									2,113,595	2,011,433	1,971,851
Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales									169,297	140,081	130,177
Store Branded Retail
Segment Reporting Information [Line Items]
Sales									582,523	571,827	608,617
Store Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales									464,705	457,467	486,886
Store Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales									117,818	114,360	121,731
Non-Retail and Other
Segment Reporting Information [Line Items]
Sales									1,061,470	1,055,164	1,038,328
Non-Retail and Other | DSD Segment
Segment Reporting Information [Line Items]
Sales									705,877	710,448	696,870
Non-Retail and Other | Warehouse Segment
Segment Reporting Information [Line Items]
Sales									$ 355,593	$ 344,716	$ 341,458