Unaudited Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 116,751	$ 64,718	$ 256,645	$ 194,129
Other comprehensive income (loss):
Change in foreign currency translation adjustment	3,026	(6)	12,327	2,927
Changes in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented	20	33	(34)	92
Cash flow hedges:
Deferred gains (losses), net of tax of $(1,971) and $(4,917), for the three and nine months ended July 31, 2017, respectively, and of $1,828 and $3,112 for each of the same periods in fiscal 2016, respectively	8,517	(11,693)	19,005	(21,286)
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $232 and $(933), for the three and nine months ended July 31, 2017, respectively, and of $(1,469) and $(4,640), for each of the same periods in fiscal 2016, respectively	22	5,174	5,615	14,087
Other comprehensive income (loss), net of tax effects	11,585	(6,492)	36,913	(4,180)
Comprehensive income	$ 128,336	$ 58,226	$ 293,558	$ 189,949