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Retirement Plans and Postretirement Costs (Details 1)
$ in Thousands
Jul. 01, 2018
USD ($)
Pension and SERP Benefits  
Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax  
Net actuarial loss $ 1,272
Total 1,272
Postretirement  
Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax  
Prior service credit (336)
Net actuarial loss 329
Total $ (7)