Borrowing Arrangements (Schedule Additional Information About The Company's 1.50% Notes) (Details) (USD $)	Sep. 28, 2012	Sep. 30, 2011	Mar. 02, 2007
Debt Disclosure [Abstract]
Equity component of the convertible notes outstanding	$ 0	$ 6,061,000
Principal amount of the convertible notes	0	26,677,000	200,000,000
Unamortized discount of the liability component	0	588,000
Net carrying amount fo the liability component	$ 0	$ 26,089,000