Reporting Segment Information - Schedule of Segment Reporting Information, by Operating Segment (Detail) - USD ($) $ in Thousands	4 Months Ended
Apr. 18, 2020	Apr. 20, 2019	Dec. 28, 2019
Segment Reporting Information [Line Items]
Net sales	$ 2,856,456	$ 2,542,375
Merger/acquisition and integration		782
Restructuring charges (gains) and asset impairment	10,237	(5,662)
Depreciation and amortization	28,029	26,632
Operating earnings (loss)	22,030	22,209
Capital expenditures	17,893	16,006
Total Assets	2,314,215		$ 2,275,609
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Total Assets			3,090
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	2,856,456	2,542,375
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(324,127)	(288,408)
Food Distribution [Member]
Segment Reporting Information [Line Items]
Net sales	1,369,495	1,169,238
Merger/acquisition and integration		(130)
Restructuring charges (gains) and asset impairment	9,222	(6,343)
Depreciation and amortization	10,556	10,233
Operating earnings (loss)	11,390	24,592
Capital expenditures	7,019	4,249
Total Assets	1,143,165		1,087,307
Food Distribution [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,369,495	1,169,238
Food Distribution [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(324,127)	(288,408)
Retail [Member]
Segment Reporting Information [Line Items]
Net sales	782,568	701,767
Merger/acquisition and integration		912
Restructuring charges (gains) and asset impairment	1,015	681
Depreciation and amortization	13,756	12,802
Operating earnings (loss)	12,645	(826)
Capital expenditures	9,594	10,615
Total Assets	755,305		794,413
Retail [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	782,568	701,767
Military [Member]
Segment Reporting Information [Line Items]
Net sales	704,393	671,370
Depreciation and amortization	3,717	3,597
Operating earnings (loss)	(2,005)	(1,557)
Capital expenditures	1,280	1,142
Total Assets	415,745		$ 390,799
Military [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	$ 704,393	$ 671,370

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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