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Benefit Plans - Expected Benefit Payments to Be Paid to Participants (Details)
$ in Thousands
Dec. 29, 2018
USD ($)
Retirement Benefits [Abstract]  
2019 $ 4,210
2020 4,243
2021 4,691
2022 4,547
2023 4,884
2024-2028 27,047
Expected contributions $ 2,300