Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Allowance For Losses On Accounts Receivable [Member]
Balance at beginning of period	$ 879	$ 1,188	$ 1,008
Additions charged to costs and expenses	1,492	581	513
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Deductions	3	890	333
Balance at end of period	2,368	879	1,188
Valuation Allowance On Deferred Income Tax Assets [Member]
Balance at beginning of period	58,343	41,935	34,075
Additions charged to costs and expenses	1,121	16,408	7,860
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Deductions	18,462	0	0
Balance at end of period	$ 41,002	$ 58,343	$ 41,935