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Benefit Plans 5 (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Employee Stock Purchase Plan Disclosures [Line Items]      
Restricted Stock Awards, Weighted Average Remaining Life 1 year 10 months    
Common stock issued to settle make-whole obligation, value   $ 12,883  
Common Stock, Capital Shares Reserved for Future Issuance 2,000,000    
Weighted Average Expented Life Assumption for Employee Stock Purchase Plan 6 months 6 months 6 months
Weighted Average Risk Free Interest Rate for Employee Stock Purchase Plan 0.07% 0.08% 0.15%
Volatility for Employee Stock Purchase Plan 72.00% 75.00% 75.00%
Weighted Average Dividend Yield for Employee Stock Purchase Plan 0.00% 0.00% 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 16.08    
Employee Stock Purchase Plan [Member]      
Employee Stock Purchase Plan Disclosures [Line Items]      
Stock Issuance Terms 85.00%    
Common Stock, Capital Shares Reserved for Future Issuance 23,517    
Stock Issued During Period, Shares, Employee Stock Purchase Plans (8,182)    
Common Stock, Capital Shares Reserved for Future Issuance 4,708 23,517  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 20.64    
Employee Stock Purchase Plan [Member] [Member]      
Employee Stock Purchase Plan Disclosures [Line Items]      
Stock Issued During Period, Shares, Employee Stock Purchase Plans (10,627)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 12.6