Goodwill and Intangible Assets - Schedule of Aggregate Amortization Expense for Intangible Assets with Finite Lives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 27, 2020	Jun. 30, 2021	Jun. 27, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 7,511	$ 7,302	$ 21,708	$ 21,367
Cost of license revenue	8,260	6,857	21,644	20,535
Total amortization expense	$ 15,771	$ 14,159	$ 43,352	$ 41,902