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Pension and Other Post-retirement Benefits - Expected to be Recognized in Net Periodic Benefit Expense (Details)
$ in Thousands
Oct. 28, 2018
USD ($)
Pension Benefits  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Amortized prior service credit $ (2,468)
Recognized actuarial losses 15,670
Post-retirement Benefits  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Amortized prior service credit (2,937)
Recognized actuarial losses $ 0