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Accrued Insurance Claims (Details) - USD ($)
$ in Thousands
Jul. 27, 2019
Jan. 26, 2019
Accrued Insurance Claims [Abstract]    
Accrued insurance claims - current $ 41,075 $ 39,961
Accrued insurance claims - non-current 58,492 68,315
Total accrued insurance claims 99,567 108,276
Insurance recoveries/receivables:    
Current (included in Other current assets) 16 0
Non-current (included in Other assets) 5,000 13,684
Insurance Settlements Receivable $ 5,016 $ 13,684