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Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 25, 2021
Sep. 25, 2020
Composition Of Certain Financial Statement Captions [Abstract]    
Supplemental retirement plan obligations $ 4,649 $ 4,181
Non-current tax liabilities 85,767 85,943
Other liabilities 24,832 32,030
Other non-current liabilities $ 115,248 $ 122,154