Fair Values of Derivative Instrument Designated and Non-Designated as Hedging Instruments in Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2012	Oct. 31, 2011
Designated As Hedging Instrument | Other Current Assets
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	$ 5,149	$ 2,161
Designated As Hedging Instrument | Other Current Liabilities
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	4,739	16,827
Non-Designated Hedging Instrument | Other Current Assets
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	68
Non-Designated Hedging Instrument | Other Current Liabilities
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	$ 88	$ 29