Financial Assets and Liabilities - Ineffective Portion and Portion Excluded from Effectiveness Testing of Derivative Hedge Gains (Losses) (Detail) - Foreign Exchange Contracts - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in statement of operations on derivatives (ineffective portion)	$ 11	$ 890	$ 175	$ 1,345
Amount of gain (loss) recognized in statement of operations on derivatives (excluded from effectiveness testing)	$ 776	$ 1,827	$ 3,393	$ 5,368