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Commitments And Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Commitments and Contingencies Disclosure [Abstract]      
Rent expense under operating leases $ 28,279 $ 27,764 $ 26,238
Future minimum rental payments, 2016 22,023    
Future minimum rental payments, 2017 20,088    
Future minimum rental payments, 2018 17,662    
Future minimum rental payments, 2019 13,840    
Future minimum rental payments, 2020 11,847    
Future minimum rental payments, thereafter 44,910    
Contingently liable for standby letters of credit issued 18,966    
Long-term Purchase Commitment [Line Items]      
Purchase Obligation 655,572    
Property, Plant and Equipment      
Long-term Purchase Commitment [Line Items]      
Purchase Obligation $ 19,627