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FAIR VALUE MEASUREMENTS (Contingent Consideration Liability) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jan. 31, 2019 | Jan. 31, 2018 | Oct. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Change in accrued contingent consideration | $ 1,862 |  |
Change in value of contingent consideration | 1,862 | $ (3,195) |
Liabilities [Abstract] |  |  |
Total liabilities | 22,462 |  | $ 20,875
Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Opening balance, Liabilities | 20,875 |  |
Change in value of contingent consideration | (350) |  |
Ending balance, Liabilities | 22,462 |  |
Liabilities [Abstract] |  |  |
Accrued Liabilities, Current | 7,489 |  |
Other Liabilities, Noncurrent | 14,973 |  |
Total liabilities | 22,462 |  | $ 20,875
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 | $ 75 |  |

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