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Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) - USD ($)
$ in Thousands
Sep. 27, 2019
Sep. 28, 2018
Composition Of Certain Financial Statement Captions [Abstract]    
Supplemental retirement plan obligations $ 3,466 $ 3,388
Non-current tax liabilities 136,323 129,253
Other liabilities 37,673 51,158
Other non-current liabilities $ 177,462 $ 183,799