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Borrowing Arrangements (Schedule Additional Information About The Company's 1.50% Notes) (Details) (USD $) | Sep. 28, 2012 | Sep. 30, 2011 | Mar. 02, 2007
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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 |

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