Stock-Based Benefit Plans (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
Jan. 31, 2012	Oct. 31, 2011
Stock Based Benefit Plans (Additional Textual) [Abstract]
Shares issued under stock-based benefit plans	941,678
Aggregate unamortized value of outstanding stock based compensation awards	$ 23.3	$ 12.7
Percentage increases over closing price	30.00%
Performance Based Restricted Stock Units [Member]
Stock Based Benefit Plans (Textual) [Abstract]
Minimum percentage of units issued to the recipients of the base award	90.00%
Maximum percentage of units issued to the recipients of the base award	110.00%
RSU vesting period	Over a four-year period
Number of consecutive trading days	20 days
Average closing price of company common stock	measured over any 20 consecutive trading days ending on or prior to 5 years from date of issuance
Period of issuance of stock price based RSU	5 years
Non-Performance Based Restricted Stock Units [Member]
Stock Based Benefit Plans (Textual) [Abstract]
RSU vesting period	Over a four-year period

Maximum percentage of units issued to the recipients of the base award.

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Minimum percentage of units issued to the recipients of the base award.

+ References

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Number of consecutive trading days.

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Percentage increases over closing price.

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Period of issuance of stock price based RSU.

+ References

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- Definition

Unamortized share-based compensation.

+ References

No definition available.

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- Definition

Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

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-Topic 718

-SubTopic 10

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

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