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Allowance For Doubtful Accounts (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 25, 2011
Sep. 26, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for Doubtful Accounts Receivable $ 5,387 $ 5,262 $ 5,853
Provision for Doubtful Accounts 1,448 2,497 2,903
Allowance for Doubtful Accounts Receivable, Recoveries (1,945) (2,372) (3,494)
Allowance for Doubtful Accounts Receivable $ 4,890 $ 5,387 $ 5,262