Fair Values Of Derivative Instrument Designated And Non-Designated As Hedging Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Oct. 31, 2011
Designated As Hedging Instrument | Other Current Assets
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	$ 1,186	$ 2,161
Designated As Hedging Instrument | Other Current Liabilities
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	15,587	16,827
Non-Designated Hedging Instrument | Other Current Assets
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	172
Non-Designated Hedging Instrument | Other Current Liabilities
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	$ 41	$ 29