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Stock-Based Compensation (Tables) | 3 Months Ended
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Feb. 29, 2012
Stock-Based Compensation [Abstract] |
Stock options outstanding and stock options exercisable |
|  | Options |  |  | Weighted Average Exercise Price |
Options outstanding at beginning of period |  |  | 10,160,396 |  |  | $ | 21.27 |
Granted |  |  | 15,000 |  |  |  | 9.70 |
Exercised |  |  | — |  |  |  | — |
Cancelled |  |  | (6,000 | ) |  |  | 16.83 |
Options outstanding at end of period |  |  | 10,169,396 |  |  |  | 21.26 |
Options exercisable at end of period |  |  | 7,241,732 |  |  |  | 26.27 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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