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, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ 638	$ (855)	$ (13,521)	$ 1,617
Amount of gain (loss) reclassified from OCI (effective portion)	(2,390)	2,540	(9,817)	4,973
Foreign Exchange Contracts | Revenues
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	1,994	(40)	5,334	3,324
Amount of gain (loss) reclassified from OCI (effective portion)	4,005	1,563	6,411	3,237
Foreign Exchange Contracts | Operating Expenses
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(1,356)	(815)	(18,855)	(1,707)
Amount of gain (loss) reclassified from OCI (effective portion)	$ (6,395)	$ 977	$ (16,228)	$ 1,736