Effect of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive Income (Loss) into Net Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) on cash flow hedges, net of taxes	$ (874)	$ 2,010	$ 2,432	$ 1,730
Foreign Exchange Contracts | Revenue
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) on cash flow hedges, net of taxes	(1,083)	2,067	1,674	2,554
Foreign Exchange Contracts | Operating Expenses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) on cash flow hedges, net of taxes	$ 209	$ (57)	$ 758	$ (824)