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Accrued Insurance Claims (Details) - USD ($)
$ in Thousands
Apr. 25, 2020
Jan. 25, 2020
Accrued Insurance Claims [Abstract]    
Accrued insurance claims - current $ 41,977 $ 38,881
Accrued insurance claims - non-current 66,913 56,026
Accrued insurance claims 108,890 94,907
Insurance recoveries/receivables:    
Current (included in Other current assets) 0 0
Non-current (included in Other assets) 12,639 4,864
Insurance Settlements Receivable $ 12,639 $ 4,864