Earnings Per Share and Stock-Based Compensation (Details) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Reconciliation of the denominator of each net income (loss) per share
Shares used in computing basic net (loss) income per share	164,518	162,822	163,930	162,198
Dilutive effect of stock options and restricted stock	1,918	5,044
Dilutive effect of stock warrants	7,463	15,622
Shares used in computing diluted net (loss) income per share	173,899	183,488	163,930	162,198

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-URI http://asc.fasb.org/extlink&oid=6528364

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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+ 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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+ Details