Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Maturity of foreign currency forward contracts			90 days
Gains (losses) on foreign currency forward contracts	$ (2,701)	$ (285)	$ (1,198)	$ (2,614)
Gains (losses) in fair value of balance sheet positions denominated in foreign currencies	$ 3,085	$ 267	$ 1,020	$ 2,448