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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 | 6 Months Ended
--- | --- | ---
Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2017 | Apr. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassifications into net income | $ (1,738) | $ (5,184) | $ (5,592) | $ (8,903)
Revenues | Gain (loss) on cash flow hedges, net of taxes |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassifications into net income | (428) | (1,429) | (2,181) | (1,217)
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 | (1,310) | (3,768) | (3,412) | (7,696)
Other income (expense) | Gain (loss) on available-for-sale securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Reclassifications into net income | $ 0 | $ 13 | $ 1 | $ 10

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