Interest and Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Other Income and Expenses [Abstract]
Interest income	$ 3,519	$ 3,212	$ 7,391	$ 5,656
Gains (losses) on non-hedge designated foreign currency forward contracts	(898)	2,868	(877)	2,169
Foreign currency exchange losses	(2,995)	(4,804)	(2,212)	(4,791)
Other	130	20	(293)	(163)
Interest and other income (loss), net	$ (244)	$ 1,296	$ 4,009	$ 2,871