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Stockholders' Equity (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Aug. 31, 2012 | May 31, 2012 | Feb. 29, 2012 | Aug. 31, 2011 | May 31, 2011 | Feb. 28, 2011 | Aug. 31, 2012 | Aug. 31, 2011
Equity [Abstract] |  |  |  |  |  |  |  |
Number of common stock, authorized, approved under a board approved stock repurchase program | 4,000,000 |  |  |  |  |  | 4,000,000 |
Dividend paid in each quarter (in dollars per share) | $ 0.0250 | $ 0.025 | $ 0.0625 | $ 0.0625 | $ 0.0625 | $ 0.0625 | $ 0.1125 | $ 0.1875

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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- Details
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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