Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 02, 2020	Sep. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Total	$ 428,704	$ 428,952
Less accumulated amortization	(297,806)	(247,724)
Intangible assets — net	130,898	181,228
Trade name, indefinite lived
Finite-Lived Intangible Assets [Line Items]
Total	3,400	3,400
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Total	179,434	179,682
Less accumulated amortization	(152,100)	(134,800)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total	245,870	245,870
Less accumulated amortization	$ (145,700)	$ (112,900)