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Benefit Plans 5 (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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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 |  |

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