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Leases (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 24, 2021
Sep. 25, 2020
Sep. 27, 2019
Lessor, Lease, Description [Line Items]      
Lesse lease term 11 years    
Lessee lease renewal term 5 years    
Lessee lease termination period 1 year    
Operating leases, rent expense, net     $ 20,600
Variable operating lease income $ 9,500 $ 10,400  
Fixed operating lease income 4,200 3,700  
Unguaranteed residual value of sales-type leases $ 800 $ 700  
Minimum [Member]      
Lessor, Lease, Description [Line Items]      
Lessor lease term 4 years    
Lessor lease renewal term 1 year    
Maximum [Member]      
Lessor, Lease, Description [Line Items]      
Lessor lease term 10 years    
Lessor lease renewal term 5 years