Sales by Product Category in Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 16, 2016	Jul. 18, 2015	Jul. 16, 2016	Jul. 18, 2015
Segment Reporting Information [Line Items]
Sales	$ 935,025	$ 888,795	$ 2,139,377	$ 2,034,840
DSD Segment
Segment Reporting Information [Line Items]
Sales	785,767	751,969	1,784,770	1,718,132
Warehouse Segment
Segment Reporting Information [Line Items]
Sales	149,258	136,826	354,607	316,708
Branded Retail
Segment Reporting Information [Line Items]
Sales	548,086	504,233	1,247,982	1,154,602
Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales	508,066	473,111	1,149,695	1,083,846
Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales	40,020	31,122	98,287	70,756
Store Branded Retail
Segment Reporting Information [Line Items]
Sales	145,749	142,838	316,981	311,301
Store Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales	116,463	116,597	249,434	249,765
Store Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales	29,286	26,241	67,547	61,536
Non-Retail and Other
Segment Reporting Information [Line Items]
Sales	241,190	241,724	574,414	568,937
Non-Retail and Other | DSD Segment
Segment Reporting Information [Line Items]
Sales	161,238	162,261	385,641	384,521
Non-Retail and Other | Warehouse Segment
Segment Reporting Information [Line Items]
Sales	$ 79,952	$ 79,463	$ 188,773	$ 184,416