Components of, and Changes in Restructuring Accruals (Detail) - USD ($) $ in Thousands		4 Months Ended
		Apr. 20, 2019	Apr. 21, 2018
Restructuring Cost And Reserve [Line Items]
Liability balance, beginning balance		$ 401	$ 25,490
Charges		188	1,259
Cash payments		(415)	(26,032)
Liability balance, ending balance	[1]	174	717
Reorganization Costs
Restructuring Cost And Reserve [Line Items]
Charges		211	1,512	[2]
Cash payments		(211)	(1,512)	[2]
Employee Termination Benefits
Restructuring Cost And Reserve [Line Items]
Liability balance, beginning balance		227	468	[3]
Charges		(23)	344	[3]
Cash payments		(204)	(608)	[3]
Liability balance, ending balance	[1],[3]		204
VSIP
Restructuring Cost And Reserve [Line Items]
Liability balance, beginning balance		174	25,022
Charges			(597)
Cash payments			(23,912)
Liability balance, ending balance	[1]	$ 174	$ 513

[1] Recorded in the other accrued current liabilities line item of our Condensed Consolidated Balance Sheets.

[2] Reorganization costs include employee relocation expenses

[3] Employee termination benefits are not related to the VSIP