Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Allowance For Losses On Accounts Receivable [Member]
Balance at beginning of period	$ 1,188	$ 1,008	$ 1,011
Additions charged to costs and expenses	581	513	1,036
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Deductions	890	333	1,039
Balance at end of period	879	1,188	1,008
Valuation Allowance On Deferred Income Tax Assets [Member]
Balance at beginning of period	41,935	34,075	27,087
Additions charged to costs and expenses	16,408	7,860	6,988
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Deductions	0	0	0
Balance at end of period	$ 58,343	$ 41,935	$ 34,075