Income Taxes (Details 2) (USD $) In Thousands	3 Months Ended	9 Months Ended
Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010
Tax Benefits potential Interest and Penalties
Tax Benefits potential Interest and Penalties	$ 1,806	$ 0	$ 2,500	$ 1,500
Tax Benefit Amount Accrued for potential Interest and Penalties
Tax Benefit Amount Accrued for potential Interest and Penalties	$ 28,806		$ 28,806		$ 39,209

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph c

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 15, 16

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant