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Goodwill And Intangible Assets (Estimated Future Amortization of Acquired Intangible Assets) (Details)
$ in Thousands
Sep. 28, 2019
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Future amortization expenses, 2020 $ 10,800
Future amortization expenses, 2021 9,400
Future amortization expenses, 2022 8,000
Future amortization expenses, 2023 7,100
Future amortization expenses, 2024 $ 6,700