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Financial Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Maturity of foreign currency forward contracts			90 days
Gains (losses) on foreign currency forward contracts	$ 1,114	$ 1,100	$ 1,503	$ (2,329)
Gains (losses) in fair value of balance sheet positions denominated in foreign currencies	$ (1,669)	$ (1,332)	$ (2,065)	$ 2,181

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.

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