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Cash, Cash Equivalents and Investments (Fair Value of Debt Securities by Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified | Aug. 31, 2014 | Nov. 30, 2013
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Investments and Cash [Abstract] |  |  |  |
Due in one year or less | $ 11,664 | [1] | $ 42,198 | [1]
Due after one year | 7,248 | [2] | 15,185 | [2]
Total | $ 18,912 |  | $ 57,383 |
[1] | nclude ARS which are tendered for interest-rate setting purposes periodically throughout the year.
[2] | Includes state and municipal bond obligations, which are securities representing investments available for current operations and are classified as current in the consolidated balance sheets.

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- Definition Fair value of debt securities maturities after one year. + References No definition available. + Details
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- Definition Fair value of debt securities maturities within one year. + References No definition available. + Details
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