Restructuring Charges and Asset Impairment - Schedule of Restructuring Activity and Asset Impairment (Detail) - USD ($) $ in Thousands	4 Months Ended
Apr. 20, 2019	Apr. 21, 2018
Restructuring Cost And Reserve [Line Items]
Asset impairment charges	$ 100	$ 1,470
(Gain) loss on sales of assets related to closed facilities	(6,925)	(49)
Provision for severance	149	125
Other costs associated with distribution center and store closings	611	282
Changes in estimates	35	285
Restructuring and asset impairment	(5,662)	6,202
Business Restructuring Reserves [Member]
Restructuring Cost And Reserve [Line Items]
Provision for closing charges	366	3,903
Facility Closing [Member]
Restructuring Cost And Reserve [Line Items]
(Gain) loss on sales of assets related to closed facilities	$ (6,923)	$ 137

Restructuring reserve revised change in estimates.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of restructuring charges, remediation cost, and asset impairment loss.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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