Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 03, 2020	Sep. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Trade name (indefinite-lived)	$ 3,400	$ 3,400
Total	428,704	428,952
Less accumulated amortization	(272,969)	(247,724)
Intangible assets — net	155,735	181,228
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	179,434	179,682
Less accumulated amortization	(143,400)	(134,800)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	245,870	245,870
Less accumulated amortization	$ (129,600)	$ (112,900)