Financial Assets And Liabilities (Gains And Losses On Derivative Instrument Recognized In Statement Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ (4,684)	$ 859
Amount of gain (loss) reclassified from OCI (effective portion)	(3,453)	(3,658)
Foreign Exchange Contracts [Member] | Revenue [Member]
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	416	1,361
Amount of gain (loss) reclassified from OCI (effective portion)	(1,610)	(2,926)
Foreign Exchange Contracts [Member] | Operating Expenses [Member]
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(5,100)	(502)
Amount of gain (loss) reclassified from OCI (effective portion)	$ (1,843)	$ (732)