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Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Maturity of foreign currency forward contracts			90 days
Gains (losses) on foreign currency forward contracts	$ (3,728)	$ (1,236)	$ (4,159)	$ (206)
Gains (losses) in fair value of balance sheet positions denominated in foreign currencies	$ 6,720	$ 1,863	$ 7,151	$ (140)

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- Definition

Foreign currency forward contracts maturity period maximum.

+ References

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- Definition

Amount of the increase (decrease) in fair value of the hedged item in a foreign currency fair value hedge which was recognized in earnings, net of offsets by the gain (loss) on the hedging instrument to the extent that the fair value hedge was determined to be effective.

+ References

No definition available.

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- Definition

Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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