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Stock-Based Compensation - Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Stock Option Activity And Changes [Line Items]
Beginning balance, Weighted Average Exercise price	$ 16.61	$ 16.14	$ 15.91
Granted, Weighted Average Exercise price
Forfeited, Weighted Average Exercise price	$ 13.10	$ 12.72
Exercised, Weighted Average Exercise price	$ 13.45	$ 15.17	$ 15.06
Ending balance, Weighted Average Exercise price	$ 19.45	$ 16.61	$ 16.14
Beginning balance, Shares	342	510	643
Granted, Shares
Forfeited, Shares	3	1
Exercised, Shares	158	167	133
Ending balance, Shares	181	342	510

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- Definition

Share based compensation arrangement by share based payments award options exercises in period weighted average exercise price.

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- Definition

Share based compensation arrangement by share based payments award options forfeitures in period weighted average exercise price.

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- Definition

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-Number 123R

-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Net number of share options (or share units) granted during the period.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of share options (or share units) exercised during the current period.

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