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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables) | 9 Months Ended
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Jul. 31, 2020
Schedule of Fair Value of Derivative Instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | July 31, 2020 | ​ | October 31, 2019 | ​
​ | ​ | Balance Sheet | ​ | Fair | ​ | Balance Sheet | ​ | Fair | ​
Derivatives |  | Location |  | Value |  | Location |  | Value |
Designated as Hedging Instruments: | ​ |  | ​ | ​ |  | ​ |  | ​ | ​ |  | ​
Foreign exchange forward contracts | ​ | Derivative assets | ​ | $ | 187 | ​ | Derivative assets | ​ | $ | 751 | ​
Foreign exchange forward contracts | ​ | Derivative liabilities | ​ | $ | 496 | ​ | Derivative liabilities | ​ | $ | 99 | ​
​ | ​ |  | ​ |  | ​ | ​ | ​ | ​ |  |  | ​
Not Designated as Hedging Instruments: | ​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ |  | ​
Foreign exchange forward contracts | ​ | Derivative assets | ​ | $ | 180 | ​ | Derivative assets | ​ | $ | 640 | ​
Foreign exchange forward contracts | ​ | Derivative liabilities | ​ | $ | 1,329 | ​ | Derivative liabilities | ​ | $ | 289 | ​
Schedule of derivative instruments not designated as hedging instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Location of Gain | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Loss) Recognized | ​ | Amount of Gain (Loss) | ​
Derivatives | ​ | in Operations | ​ | Recognized in Operations | ​
​ | ​ | ​ | ​ | Nine Months Ended | ​
​ | ​ | ​ | ​ | July 31, | ​
​ |  | ​ |  | 2020 |  | 2019 |
Not Designated as Hedging Instruments: |  |  |  | ​ |  |  | ​ | ​ |
Foreign exchange forward contracts |  | Other income (expense), net | ​ | $ | (658) |  | $ | 249 |
Schedule of changes in the components of Accumulated other comprehensive loss, net of tax | The following table presents the changes in the components of Accumulated other comprehensive loss, net of tax, for the three months ended July 31, 2020 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Foreign Currency | ​ | Cash Flow | ​ | ​ | ​
​ |  | Translation |  | Hedges |  | Total
Balance, April 30, 2020 | ​ | $ | (9,894) |  | $ | 1,546 | ​ | $ | (8,348)
Other comprehensive income (loss) before reclassifications | ​ |  | 5,092 | ​ |  | (480) | ​ |  | 4,612
Reclassifications | ​ |  | — | ​ |  | (158) | ​ |  | (158)
Balance, July 31, 2020 | ​ | $ | (4,802) |  | $ | 908 | ​ | $ | (3,894)
​ The following table presents the changes in the components of Accumulated other comprehensive loss, net of tax, for the nine months ended July 31, 2020 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Foreign Currency | ​ | Cash Flow | ​ | ​ | ​
​ |  | Translation |  | Hedges |  | Total
Balance, October 31, 2019 | ​ | $ | (10,042) |  | $ | 1,109 | ​ | $ | (8,933)
Other comprehensive income (loss) before reclassifications | ​ |  | 5,240 | ​ |  | 67 | ​ |  | 5,307
Reclassifications | ​ |  | — | ​ |  | (268) | ​ |  | (268)
Balance, July 31, 2020 | ​ | $ | (4,802) |  | $ | 908 | ​ | $ | (3,894)
Designated as Hedging Instrument |
Schedule of Effect of Derivative Instruments on the Balance Sheets, Statements of Changes in Shareholders' Equity and Statements of Operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Location of Gain | ​ | Amount of Gain
​ | ​ | Amount of Gain (Loss) | ​ | (Loss) Reclassified | ​ | (Loss) Reclassified
​ | ​ | Recognized in Other | ​ | from Other | ​ | from Other
​ | ​ | Comprehensive | ​ | Comprehensive | ​ | Comprehensive
Derivatives | ​ | Income (Loss) | ​ | Income (Loss) | ​ | Income (Loss)
​ | ​ | Three Months Ended | ​ | ​ | ​ | Three Months Ended
​ | ​ | July 31, | ​ | ​ | ​ | July 31,
​ |  | 2020 |  | 2019 |  | ​ |  | 2020 |  | 2019
Designated as Hedging Instruments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Effective portion) |  | ​ |  | ​ | ​ | ​ | ​ |  | ​ | ​ |  |  | ​ | ​
Foreign exchange forward contracts – Intercompany sales/purchases | ​ | $ | (480) | ​ | $ | 446 | ​ | Cost of sales and service | ​ | $ | 158 |  | $ | (39)
Foreign exchange forward contract – Net investment | ​ | $ | (193) | ​ | $ | 41 | ​ |  | ​ |  |  |  |  |
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Location of Gain | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amount of Gain (Loss) | ​ | (Loss) Reclassified | ​ | Amount of Gain (Loss) | ​
​ | ​ | Recognized in Other | ​ | from Other | ​ | Reclassified from Other | ​
​ | ​ | Comprehensive | ​ | Comprehensive | ​ | Comprehensive | ​
Derivatives | ​ | Income (Loss) | ​ | Income (Loss) | ​ | Income (Loss) | ​
​ | ​ | Nine Months Ended | ​ | ​ | ​ | Nine Months Ended | ​
​ | ​ | July 31, | ​ | ​ | ​ | July 31, | ​
​ |  | 2020 |  | 2019 |  | ​ |  | 2020 |  | 2019 |
Designated as Hedging Instruments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Effective portion) |  | ​ |  | ​ | ​ | ​ | ​ |  | ​ | ​ |  |  | ​ | ​ |
Foreign exchange forward contracts – Intercompany sales/purchases | ​ | $ | 67 | ​ | $ | 465 | ​ | Cost of sales and service | ​ | $ | 268 |  | $ | (3) | ​
Foreign exchange forward contract – Net investment | ​ | $ | (104) | ​ | $ | 113 | ​ |  | ​ |  |  |  |  |  | ​

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