Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 1,108,431
Other comprehensive income (loss), net of tax	(1,422)	$ (5,707)	$ 10,109
Ending balance	1,184,119	1,108,431
Unamortized net gains on cash flow hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	200	301	687
Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-01)	0
Beginning Balance, as adjusted		200
Other comprehensive income (loss) before reclassifications and tax	0	0	(684)
Tax impact	0	0	271
Reclassification adjustments, before tax	133	(132)	40
Tax impact	(33)	31	(13)
Other comprehensive income (loss), net of tax	(100)	(101)	(386)
Ending balance	100	200	301
Net unrealized gains on available-for-sale investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	3,714	4,128	2,943
Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-01)	(3,714)
Beginning Balance, as adjusted		0
Other comprehensive income (loss) before reclassifications and tax	0	2,409	1,930
Tax impact	0	(699)	(743)
Reclassification adjustments, before tax	0	(2,940)	(4)
Tax impact	0	816	2
Other comprehensive income (loss), net of tax	0	(414)	1,185
Ending balance	0	3,714	4,128
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(57,095)	(51,903)	(61,213)
Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-01)	0
Beginning Balance, as adjusted		(57,095)
Other comprehensive income (loss) before reclassifications and tax	(1,322)	(5,192)	9,310
Tax impact	0	0	0
Reclassification adjustments, before tax	0	0	0
Tax impact	0	0	0
Other comprehensive income (loss), net of tax	(1,322)	(5,192)	9,310
Ending balance	(58,417)	(57,095)	(51,903)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(53,181)	(47,474)	(57,583)
Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-01)	(3,714)
Beginning Balance, as adjusted		(56,895)
Other comprehensive income (loss) before reclassifications and tax	(1,322)	(2,783)	10,556
Tax impact	0	(699)	(472)
Reclassification adjustments, before tax	(133)	(3,072)	36
Tax impact	33	847	(11)
Other comprehensive income (loss), net of tax	(1,422)	(5,707)	10,109
Ending balance	$ (58,317)	$ (53,181)	$ (47,474)