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Restructuring Charges and Asset Impairment - Schedule of Restructuring Activity and Asset Impairment (Detail) - USD ($) $ in Thousands | 4 Months Ended
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Apr. 18, 2020 | Apr. 20, 2019
Restructuring Cost And Reserve [Line Items] |  |
Asset impairment charges | $ 6,733 | $ 100
Gain on sales of assets related to closed facilities | 3,911 | (6,925)
Provision for severance | 2,198 | 149
Other costs associated with site closures | 1,003 | 611
Changes in estimates | 68 | 35
Restructuring and asset impairment | 10,237 | (5,662)
Business Restructuring Reserves [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Provision for closing charges | 325 | 366
Facility Closing [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Gain on sales of assets related to closed facilities | $ (90) | $ (6,923)

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