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, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications into net income	$ (331)	$ (4,012)	$ (854)	$ (8,487)
Revenues | Gain (loss) on cash flow hedges, net of taxes
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications into net income	272	199	182	363
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	$ (603)	$ (4,211)	$ (1,036)	$ (8,850)