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Retirement Plans and Postretirement Costs (Details 8)
$ in Thousands
Jul. 01, 2018
USD ($)
Pension and SERP Benefits  
Expected future benefit payments  
2019 $ 5,719
2020 5,760
2021 6,360
2022 6,411
2023 6,136
2024-2028 31,401
Postretirement Benefits  
Expected future benefit payments  
2019 215
2020 163
2021 146
2022 135
2023 108
2024-2028 $ 254