Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Allowance For Losses On Accounts Receivable [Member]
Balance at beginning of period	$ 1,011	$ 3,256	$ 1,400
Additions charged to costs and expenses	1,036	259	1,863
Deductions	1,039	2,504	7
Balance at end of period	1,008	1,011	3,256
Valuation Allowance On Deferred Income Tax Assets [Member]
Balance at beginning of period	27,087	5,116	2,548
Additions charged to costs and expenses	6,988	21,971	1,238
Additions charged to other accounts			1,330
Balance at end of period	$ 34,075	$ 27,087	$ 5,116