Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	$ 1,012,260
Other comprehensive income (loss), net of tax	(5,707)	$ 10,109	$ (8,997)
Ending balance,	1,108,431	1,012,260
Unamortized net gains (losses) on cash flow hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	301	687	674
Other comprehensive income (loss) before reclassifications and tax	0	(684)	0
Tax impact	0	(271)	0
Reclassification adjustments, before tax	(132)	40	22
Tax impact	31	(13)	(9)
Other comprehensive income (loss), net of tax	(101)	(386)	13
Ending balance,	200	301	687
Net unrealized holding gains (losses) on available-for-sale investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	4,128	2,943	3,733
Other comprehensive income (loss) before reclassifications and tax	2,409	1,930	732
Tax impact	(699)	(743)	(303)
Reclassification adjustments, before tax	(2,940)	(4)	(2,082)
Tax impact	816	2	863
Other comprehensive income (loss), net of tax	(414)	1,185	(790)
Ending balance,	3,714	4,128	2,943
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	(51,903)	(61,213)	(52,993)
Other comprehensive income (loss) before reclassifications and tax	(5,192)	9,310	(8,220)
Tax impact	0	0	0
Reclassification adjustments, before tax	0	0	0
Tax impact	0	0	0
Other comprehensive income (loss), net of tax	(5,192)	9,310	(8,220)
Ending balance,	(57,095)	(51,903)	(61,213)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	(47,474)	(57,583)	(48,586)
Other comprehensive income (loss) before reclassifications and tax	(2,783)	10,556	(7,488)
Tax impact	(699)	(472)	(303)
Reclassification adjustments, before tax	(3,072)	36	(2,060)
Tax impact	847	(11)	854
Other comprehensive income (loss), net of tax	(5,707)	10,109	(8,997)
Ending balance,	$ (53,181)	$ (47,474)	$ (57,583)