Composition Of Certain Financial Statement Captions (Schedule Of Prepaid Expenses And Other Current Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 24, 2021
Composition Of Certain Financial Statement Captions [Abstract]
Prepaid assets	$ 35,615	$ 29,964
Other current assets	33,078	32,773
Prepaid expenses and other current assets	$ 68,693	$ 62,737

Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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