Condensed Consolidated Statements of Cash Flows - Reconciliation - USD ($) $ in Thousands	Jul. 04, 2020	Sep. 28, 2019	Jun. 29, 2019	Sep. 29, 2018
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 378,992	$ 305,833	$ 316,458
Restricted cash, current	736	792	825
Restricted cash, non-current	4,486	12,036	12,486
Total cash, cash equivalents, and restricted cash shown in the condensed consolidated statement of cash flows	$ 384,214	$ 318,661	$ 329,769	$ 324,045

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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