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FAIR VALUE MEASUREMENTS (Contingent Consideration Liability) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Jul. 31, 2017 | Jul. 31, 2016 | Oct. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Change in value of contingent consideration | $ 1,227 | $ 2,635 |
Liabilities [Abstract] |  |  |
Total liabilities | 14,041 |  | $ 18,881
Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Opening balance, Liabilities | 18,881 |  |
Change in value of contingent consideration | (7,039) |  |
Increase in accrued contingent consideration | 1,227 |  |
Ending balance, Liabilities | 14,041 |  |
Liabilities [Abstract] |  |  |
Accrued Liabilities, Current | 7,014 |  |
Other Liabilities, Noncurrent | 7,027 |  |
Total liabilities | 14,041 |  | $ 18,881
Foreign Currency Gain (Loss) [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Foreign currency transaction adjustments | $ 972 |  |

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