Sales by Product Category in Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 06, 2018	Oct. 07, 2017	Oct. 06, 2018	Oct. 07, 2017
Segment Reporting Information [Line Items]
Sales	$ 923,449	$ 932,822	$ 3,071,185	$ 3,047,110
DSD Segment
Segment Reporting Information [Line Items]
Sales	780,253	787,255	2,592,363	2,580,007
Warehouse Segment
Segment Reporting Information [Line Items]
Sales	143,196	145,567	478,822	467,103
Branded Retail
Segment Reporting Information [Line Items]
Sales	547,350	551,309	1,816,653	1,795,923
Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales	514,405	514,346	1,700,461	1,674,871
Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales	32,945	36,963	116,192	121,052
Store Branded Retail
Segment Reporting Information [Line Items]
Sales	140,999	138,656	463,171	455,331
Store Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales	114,581	110,853	372,802	368,371
Store Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales	26,418	27,803	90,369	86,960
Non-Retail and Other
Segment Reporting Information [Line Items]
Sales	235,100	242,857	791,361	795,856
Non-Retail and Other | DSD Segment
Segment Reporting Information [Line Items]
Sales	151,267	162,056	519,100	536,765
Non-Retail and Other | Warehouse Segment
Segment Reporting Information [Line Items]
Sales	$ 83,833	$ 80,801	$ 272,261	$ 259,091