Stock Based Benefit Plans (Details 5) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised	2,467,000	2,498,000	4,436,000
Net exercise method [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised	194,000	1,201,372	93,000
Shares withheld	98,918	798,420	21,070
Shares issued	95,082	402,952	71,930
Average fair market value per share withheld	18.94	17.96	21.29
Aggregate fair market value of shares withheld	1,873	14,341	400

Number of shares issued during the period as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration