Earnings Per Share (Calculation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
May 31, 2012	May 31, 2011	May 31, 2012	May 31, 2011
Earnings Per Share [Abstract]
Net (loss) income	$ (1,908)	$ 17,960	$ 5,581	$ 38,481
Weighted average shares outstanding	63,051	66,897	62,598	66,942
Dilutive impact from common stock equivalents	0	2,349	1,043	2,511
Diluted weighted average shares outstanding	63,051	69,246	63,641	69,453
Basic earnings per share	$ (0.03)	$ 0.27	$ 0.09	$ 0.57
Diluted earnings per share	$ (0.03)	$ 0.26	$ 0.09	$ 0.55

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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-Appendix A

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-Glossary Other Comprehensive Income

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-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

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+ Details

- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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-Glossary Weighted-Average Number of Common Shares Outstanding

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+ Details