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Commitments (Rent Exepense) (Details) (USD $)
12 Months Ended
Sep. 30, 2011
Oct. 01, 2010
Oct. 02, 2009
Sep. 28, 2012
Commitments and Contingencies Disclosure [Abstract]        
Operating Leases, Rent Expense $ 10,500,000 $ 7,600,000 $ 7,600,000  
Operating Leases, Future Minimum Payments Due [Abstract]        
2012       8,491,000
2013       7,700,000
2014       6,919,000
2015       4,222,000
2016       2,769,000
Thereafter       4,084,000
Operating Leases, Future Minimum Payments Due       34,185,000
Other commitments due in one year       6,600,000
Other commitments due in two yeara $ 3,000,000