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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) € in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2021 USD ($) | Apr. 30, 2020 USD ($) | Apr. 30, 2021 USD ($) | Apr. 30, 2020 USD ($) | Nov. 30, 2020 EUR (€) | Oct. 31, 2020 USD ($)
Derivative financial instruments: |  |  |  |  |  |
Notional principal of foreign exchange contracts | $ 79,100,000 |  | $ 79,100,000 |  |  | $ 70,800,000
Gain (loss), net of tax, related to cash flow hedged | (629,000) |  | (629,000) |  |  |
Unrealized gain (loss), net of tax, to be reclassified in next 12 months | 254,000 |  | 254,000 |  |  |
Designated as Hedging Instrument |  |  |  |  |  |
Derivative financial instruments: |  |  |  |  |  |
Gains or (losses) from hedges deemed ineffective | 0 | $ 0 | 0 | $ 0 |  |
Not Designated as Hedging Instrument |  |  |  |  |  |
Derivative financial instruments: |  |  |  |  |  |
Notional principal of foreign exchange contracts | 30,800,000 |  | 30,800,000 |  |  |
Forward Contracts | Designated as Hedging Instrument |  |  |  |  |  |
Derivative financial instruments: |  |  |  |  |  |
Notional principal of foreign exchange contracts | € |  |  |  |  | € 3.0 |
Realized gain, net of tax, recorded as cumulative translation adjustments in Accumulated Other Comprehensive Loss | 813,000 |  | 813,000 |  |  |
Unrealized gain, net of tax, recorded as cumulative translation adjustments in Accumulated Other Comprehensive Loss |  |  | (42,000) |  |  |
Euros | Designated as Hedging Instrument |  |  |  |  |  |
Derivative financial instruments: |  |  |  |  |  |
Notional principal of foreign exchange contracts | 14,900,000 |  | 14,900,000 |  |  |
Pounds Sterling | Designated as Hedging Instrument |  |  |  |  |  |
Derivative financial instruments: |  |  |  |  |  |
Notional principal of foreign exchange contracts | 7,300,000 |  | 7,300,000 |  |  |
New Taiwan Dollars | Designated as Hedging Instrument |  |  |  |  |  |
Derivative financial instruments: |  |  |  |  |  |
Notional principal of foreign exchange contracts | $ 23,000,000.0 |  | $ 23,000,000.0 |  |  |

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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 + Details
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- Definition Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 20 -Section 45 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121577181&loc=SL110061172-113977 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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