Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts Disclosure) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Allowance For Doubtful Accounts Receivable [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 4,209	$ 4,347	$ 3,110
Charged to Bad Debt Expense	2,514	1,319	2,038
Write-Offs/Adjustments Charged to Allowance	689	1,457	801
Balance at End of Period	6,034	4,209	4,347
Valuation Allowance For Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	38,456	35,429	20,757
Increases	8,642	3,071	15,450
Deductions	174	44	778
Balance at End of Period	$ 46,924	$ 38,456	$ 35,429