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Leases (Components of Rent Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Oct. 01, 2017
Leases [Abstract]      
Minimum rentals $ 184,587 $ 184,106 $ 185,696
Contingent rentals 2,255 2,221 2,419
Total rent expense 186,842 186,327 188,115
Less rental expense on subleased properties (170,651) (162,640) (145,728)
Net rent expense $ 16,191 $ 23,687 $ 42,387