Interest and Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Other Income and Expenses [Abstract]
Interest income	$ 3,475	$ 3,620	$ 10,866	$ 9,276
Gains (losses) on non-hedge designated foreign currency forward contracts	119	2,182	(757)	4,351
Foreign currency exchange losses	(2,373)	(6,879)	(4,585)	(11,670)
Other	(171)	(466)	(465)	(629)
Interest and other income (loss), net	$ 1,050	$ (1,543)	$ 5,059	$ 1,328