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Hurricane Harvey (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Mar. 14, 2018
USD ($)
location
Mar. 15, 2017
USD ($)
Aug. 30, 2017
USD ($)
Aug. 26, 2017
location
Unusual or Infrequent Item, or Both [Line Items]        
Proceeds from insurance settlement, to cover operating activities $ 276 $ 0    
Natural Disasters, Hurricane Harvey        
Unusual or Infrequent Item, or Both [Line Items]        
Number of locations impacted by hurricane harvey | location       55
Aggregate number of operating days closed 200 days      
Number of restaurants closed due to hurricane harvey | location 2      
Lost sales incurred due to hurricane harvey     $ 2,000  
Loss before income taxes and discontinued operations impacted due to hurrican harvey     $ 1,500  
Cost of property repairs due to hurricane harvey $ 700      
Proceeds from insurance collected 1,000      
Proceeds from insurance settlement, to cover operating activities 300      
Reduction to asset retirement $ 300