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Composition Of Certain Financial Statement Captions (Schedule Of Prepaid Expenses And Other Current Assets) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 28, 2018
Sep. 29, 2017
Composition Of Certain Financial Statement Captions [Abstract]    
Document Period End Date Sep. 28, 2018  
Prepaid assets $ 18,508 $ 16,681
Other current assets 14,265 11,383
Income tax receivable 2,436 2,444
Prepaid expenses and other current assets $ 35,209 $ 30,508