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Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | Sep. 27, 2019 | Sep. 28, 2018
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Finite-Lived Intangible Assets [Line Items] |  |
Total | $ 428,952 | $ 773,307
Less accumulated amortization | (247,724) | (260,522)
Intangible assets — net | 181,228 | 512,785
Trade name, indefinite lived |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total | 3,400 | 3,400
Acquired technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total | 179,682 | 251,673
Less accumulated amortization | (134,800) | (140,000)
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total | 245,870 | 518,234
Less accumulated amortization | $ (112,900) | $ (120,500)

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