Interest and Other Income (Loss), Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Other Income and Expenses [Abstract]
Interest income	$ 3,620	$ 1,820	$ 9,276	$ 4,609
Gains (losses) on non-hedge designated foreign currency forward contracts	2,182	834	4,351	(891)
Foreign currency exchange loss	(6,879)	(2,946)	(11,670)	(4,071)
Modification of term loan	0	0	0	(2,924)
Other	(466)	(556)	(629)	(119)
Interest and other income (loss), net	$ (1,543)	$ (848)	$ 1,328	$ (3,396)