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Share-Based Compensation Plans Employee stock purchase plan (Details) (USD $)
6 Months Ended
Apr. 30, 2013
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]  
Stock Issued During Period, Shares, Employee Stock Purchase Plans 108,008
Stock Issued During Period, Value, Employee Stock Purchase Plan $ 0.79
Common Stock, Capital Shares Reserved for Future Issuance 666,365