Accumulated Other Comprehensive Income (Loss) - Effect of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive Income (Loss) into Net Income (Detail) - Reclassification out of accumulated other comprehensive income (loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications into net income	$ (2,385)	$ 2,540	$ (9,795)	$ 4,973
Revenues | Gain (loss) on cash flow hedges, net of taxes
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications into net income	4,005	1,563	6,411	3,237
Operating Expenses | Gain (loss) on cash flow hedges, net of taxes
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications into net income	6,395	977	16,228	1,736
Other Income (Expense) | Gain (loss) on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications into net income	$ 5	$ 0	$ 22	$ 0