Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020
Related Party Transactions [Abstract]
Related party revenues	$ 24,000	$ 19,000	$ 46,000	$ 48,000
Accounts receivable, net	20,789		20,789		$ 20,884
Contract assets	4,641		4,641		3,261
Contract liabilities	$ 2,486		$ 2,486		$ 478

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant