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Impairment of Long-Lived Assets, Discontinued Operations, Property Held for Sale and Store Closings - Sales and Pretax Income (Losses) Reported for Discontinued Operations (Details) - USD ($)
$ in Thousands
4 Months Ended
Dec. 19, 2018
Dec. 20, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Loss from discontinued operations, net of income taxes $ (6) $ (35)
Discontinued Operations    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Sales 0 0
Pretax loss (6) (2)
Income tax expense from discontinued operations 0 (33)
Loss from discontinued operations, net of income taxes $ (6) $ (35)