Sales by Product Category in Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended										4 Months Ended				12 Months Ended
	Dec. 30, 2017	Oct. 07, 2017	[1]	Jul. 15, 2017	[1]	Dec. 31, 2016	Oct. 08, 2016	[1]	Jul. 16, 2016	[1]	Apr. 22, 2017	[1]	Apr. 23, 2016	[1]	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Segment Reporting Information [Line Items]
Sales	$ 873,623	$ 932,822		$ 926,639		$ 868,717	$ 918,791		$ 935,025		$ 1,187,649		$ 1,204,352		$ 3,920,733	$ 3,926,885	$ 3,778,505
DSD Segment
Segment Reporting Information [Line Items]
Sales															3,318,563	3,284,177	3,179,348
Warehouse Segment
Segment Reporting Information [Line Items]
Sales															602,170	642,708	599,157
Branded Retail
Segment Reporting Information [Line Items]
Sales															2,299,931	2,283,526	2,151,514
Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales															2,149,966	2,114,142	2,011,433
Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales															149,965	169,384	140,081
Store Branded Retail
Segment Reporting Information [Line Items]
Sales															582,454	582,280	571,827
Store Branded Retail | DSD Segment
Segment Reporting Information [Line Items]
Sales															470,941	464,456	457,467
Store Branded Retail | Warehouse Segment
Segment Reporting Information [Line Items]
Sales															111,513	117,824	114,360
Non-Retail and Other
Segment Reporting Information [Line Items]
Sales															1,038,348	1,061,079	1,055,164
Non-Retail and Other | DSD Segment
Segment Reporting Information [Line Items]
Sales															697,656	705,579	710,448
Non-Retail and Other | Warehouse Segment
Segment Reporting Information [Line Items]
Sales															$ 340,692	$ 355,500	$ 344,716

[1] As disclosed in Note 4, Financial Statement Revisions, the company reported cash receipts and payments for the repurchase and sale of territories and cash paid at issuance of notes receivable at net when these transactions should have been disaggregated. We concluded that the errors were not material to any of these prior periods that were impacted. The error resulted in an understatement of cash flows from operating activities and cash flows used in investing activities of $5.9 million, $12.1 million and $12.8 million, respectively, for the sixteen, twenty-eight, and forty week amounts included in the first, second, and third quarters of fiscal 2017, respectively.  These amounts will be revised upon subsequent presentation of these financial statements.