Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Sep. 29, 2019
Related Party Transactions [Abstract]
Related party revenues	$ 95,500	$ 88,200	$ 99,100
Related party expenses	92,400	86,400	$ 98,500
Accounts receivable, net	19,082	20,884
Contract assets	5,092	3,261
Contract liabilities	$ 3,026	$ 478