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Financial Assets And Liabilities (Schedule Of Stated Maturities Of Short-Term Investments) (Details) (USD $) In Thousands, unless otherwise specified | Oct. 31, 2011
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Financial Assets And Liabilities [Abstract] |
Due in 1 year or less | $ 89,791
Due in 1-5 years | 28,413
Due in 6-10 years | 11,409
Due after 10 years | 19,384
Total Fair Value | $ 148,997

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