Gain (Loss) Reclassified out of Accumulated Other Comprehensive Income into Net Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (loss) on cash flow hedges, net of taxes	$ 2,010	$ (2,117)	$ 1,730	$ (5,570)
Foreign Exchange Contracts | Revenue
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (loss) on cash flow hedges, net of taxes	2,067	(24)	2,554	(1,634)
Foreign Exchange Contracts | Operating Expenses
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (loss) on cash flow hedges, net of taxes	$ (57)	$ (2,093)	$ (824)	$ (3,936)