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Intangible Assets (Tables)
 9 Months Ended
Jul. 02, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Amortization Expense of Intangible Assets
Amortization expense related to intangible assets is as follows (in thousands):
 Three Months EndedNine Months Ended
 July 2,
2021		July 3,
2020		July 2,
2021		July 3,
2020
Cost of revenue$3,806 $4,348 $11,489 $13,115 
Selling, general and administrative7,602 8,071 23,318 24,797 
Total$11,408 $12,419 $34,807 $37,912 
Summary of Intangible Assets
Intangible assets consist of the following (in thousands):
July 2,
2021		October 2,
2020
Acquired technology$179,434 $179,434 
Customer relationships245,870 245,870 
Trade name (indefinite-lived)3,400 3,400 
Total 428,704 428,704 
Less accumulated amortization(332,613)(297,806)
Intangible assets — net$96,091 $130,898 
Summary of Activity in Intangible Assets and Goodwill
A summary of the activity in gross intangible assets and goodwill is as follows (in thousands):
Intangible Assets
Total Intangible AssetsAcquired
Technology		Customer
Relationships		Trade NameGoodwill
Balance as of October 2, 2020$428,704 $179,434 $245,870 $3,400 $315,012 
Currency translation adjustment— — — — (674)
Balance as of July 2, 2021$428,704 $179,434 $245,870 $3,400 $314,338 
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years
As of July 2, 2021, our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands):
2021 Remaining2022202320242025ThereafterTotal
Amortization expense$11,406 33,433 26,048 15,410 3,489 2,905 $92,691