Interest and Other Income (Loss), Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Other Income and Expenses [Abstract]
Interest income	$ 3,212	$ 1,507	$ 5,656	$ 2,789
Gains (losses) on non-hedge designated foreign currency forward contracts	2,868	(2,749)	2,169	(1,725)
Foreign currency exchange gain (loss)	(4,804)	1,292	(4,791)	(1,125)
Modification of term loan	0	(2,924)	0	(2,924)
Other	20	(44)	(163)	437
Interest and other income (loss), net	$ 1,296	$ (2,918)	$ 2,871	$ (2,548)