Unaudited Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 102,472	$ 53,306	$ 98,781	$ 139,894
Other comprehensive income (loss):
Change in foreign currency translation adjustment	(11,122)	13,961	9,958	9,301
Changes in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented	0	9	0	(54)
Cash flow hedges:
Deferred gains (losses), net of tax of $2,264 and $(1,155), for the three and six months ended April 30, 2018, respectively, and of $(2,265) and $(2,945) for each of the same periods in fiscal 2017, respectively	(8,533)	4,036	4,480	10,488
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $1,195 and $2,520, for the three and six months ended April 30, 2018, respectively, and of $(315) and $(1,164) for each of the same periods in fiscal 2017, respectively	(5,542)	1,738	(10,848)	5,593
Other comprehensive income (loss), net of tax effects	(25,197)	19,744	3,590	25,328
Comprehensive income	$ 77,275	$ 73,050	$ 102,371	$ 165,222