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Cash, Cash Equivalents And Investments (Narrative) (Details) (USD $)
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Feb. 29, 2012
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Nov. 30, 2011
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| Cash, Cash Equivalents And Investments [Line Items] | ||
| Investments in auction rate securities | $ 33,343,000 | $ 33,539,000 |
| Unrealized losses | 6,300,000 | 6,400,000 |
| Cash and short-term investments balance | 315,164,000 | 261,416,000 |
| Other accrued expenses | 39,230,000 | 35,728,000 |
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State And Municipal Bond Obligations [Member]
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| Cash, Cash Equivalents And Investments [Line Items] | ||
| Other accrued expenses | $ 2,800,000 |
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- Details
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- Definition
Cash cash equivalents and investments unrealized losses. No definition available.
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- Definition
Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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