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Leases Lease Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 02, 2020
Sep. 27, 2019
Sep. 28, 2018
Leases [Abstract]      
Finance Lease, Right-of-Use Asset, Amortization $ 3,022    
Finance Lease, Interest Expense 2,155    
Lease, Cost 5,177    
Operating Lease, Cost 9,815    
Variable Lease, Cost 2,645    
Short-term Lease, Cost 368    
Sublease Income $ (592)    
Operating Leases, Rent Expense   $ 9,700 $ 9,500