Unaudited Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 118,210	$ 102,472	$ 271,724	$ 98,781
Other comprehensive income:
Change in foreign currency translation adjustment	(3,327)	(11,122)	2,056	9,958
Cash flow hedges:
Deferred gains (losses), net of tax of $(123) and $(1,714), for the three and six months ended April 30, 2019, respectively, and of $2,264 and $(1,155) for each of the same periods in fiscal 2018, respectively.	447	(8,533)	5,914	4,480
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $(1,050) and $(2,286), for the three and six months ended April 30, 2019 respectively, and of $1,195 and $2,520 for each of the same periods in fiscal 2018, respectively.	4,012	(5,542)	8,487	(10,848)
Other comprehensive income (loss), net of tax effects	1,132	(25,197)	16,457	3,590
Comprehensive income	$ 119,342	$ 77,275	$ 288,181	$ 102,371