Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020	Sep. 27, 2020
Related Party Transactions [Abstract]
Related party revenues	$ 24,200	$ 19,000	$ 69,800	$ 67,000
Related party expenses	23,200	$ 18,400	67,200	$ 66,000
Accounts receivable, net	21,102		21,102		$ 20,884
Contract assets	4,669		4,669		3,261
Contract liabilities	$ 2,709		$ 2,709		$ 478

Carrying amount as of the balance sheet date of obligations due all related parties.

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+ Details