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
	Jan. 31, 2021	Jan. 31, 2020
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ 4,093	$ 1,651
Amount of gain (loss) reclassified from OCI (effective portion)	2,726	(522)
Foreign Exchange Contracts | Revenues
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(163)	1,080
Amount of gain (loss) reclassified from OCI (effective portion)	113	(89)
Foreign Exchange Contracts | Operating expenses
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	4,256	571
Amount of gain (loss) reclassified from OCI (effective portion)	$ 2,613	$ (433)