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Financial Assets and Liabilities - Unaudited Condensed Consolidated Statement of Operations Location and Amount of Gains and Losses on Derivative Instrument Fair Values for Designated Hedge Instruments, Net of Tax (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2018 | Jul. 31, 2017
Financial Assets and Liabilities [Line Items] |  |  |  |
Amount of gain (loss) recognized in OCI on derivatives (effective portion) | $ (12,371) | $ 8,571 | $ (7,891) | $ 19,181
Amount of gain (loss) reclassified from OCI (effective portion) | 1,662 | (22) | 12,510 | (5,615)
Foreign Exchange Contracts | Revenues |  |  |  |
Financial Assets and Liabilities [Line Items] |  |  |  |
Amount of gain (loss) recognized in OCI on derivatives (effective portion) | 1,422 | (176) | (542) | 6,824
Amount of gain (loss) reclassified from OCI (effective portion) | (308) | (198) | 1,190 | (2,379)
Foreign Exchange Contracts | Operating expenses |  |  |  |
Financial Assets and Liabilities [Line Items] |  |  |  |
Amount of gain (loss) recognized in OCI on derivatives (effective portion) | (13,793) | 8,747 | (7,349) | 12,357
Amount of gain (loss) reclassified from OCI (effective portion) | $ 1,970 | $ 176 | $ 11,320 | $ (3,236)

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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