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Rental Commitments For Noncancelable Operating Leases (Detail)
$ in Thousands
Sep. 28, 2018
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2019 $ 12,592
2020 9,127
2021 6,982
2022 4,491
2023 4,301
2024 and thereafter 3,982
Operating Leases, Future Minimum Payments Due, Total $ 41,475