Borrowing Arrangements (Schedule Additional Information About The Company's 1.50% Notes) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2011	Sep. 30, 2011	Mar. 02, 2007
Debt Instrument [Line Items]
Equity component of the convertible notes outstanding	$ 3,926	$ 6,061
Debt Instrument, Face Amount	17,277	26,677	200,000
Unamortized discount of the liability component	154	588
Net carrying amount of the liability component	$ 17,123	$ 26,089