Fair Values of Derivative Instrument Designated and Non-Designated as Hedging Instruments in Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Oct. 31, 2012
Designated As Hedging Instrument | Other Current Assets
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	$ 16,978	$ 5,149
Designated As Hedging Instrument | Other Current Liabilities
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	1,765	4,739
Non-Designated Hedging Instrument | Other Current Assets
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	3,871	68
Non-Designated Hedging Instrument | Other Current Liabilities
Financial Assets and Liabilities [Line Items]
Fair Values of derivative instruments	$ 16	$ 88