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Accrued Insurance Claims (Details) - USD ($)
$ in Thousands
Oct. 27, 2018
Jan. 27, 2018
Accrued Insurance Claims [Abstract]    
Accrued insurance claims - current $ 41,579 $ 53,890
Accrued insurance claims - non-current 65,981 59,385
Total accrued insurance claims 107,560 113,275
Insurance recoveries/receivables:    
Current (included in Other current assets) 0 13,701
Non-current (included in Other assets) 9,776 6,722
Insurance Settlements Receivable $ 9,776 $ 20,423