Unaudited Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 53,306	$ 69,376	$ 139,894	$ 129,411
Other comprehensive income (loss):
Change in foreign currency translation adjustment	13,961	17,388	9,301	2,933
Changes in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented	9	106	(54)	59
Cash flow hedges:
Deferred gains (losses), net of tax of $(2,265) and $(2,945), for the three and six months ended April 30, 2017, respectively, and of $(2,367) and $1,285 for each of the same periods in fiscal 2016, respectively	4,036	3,041	10,488	(9,593)
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $(315) and $(1,164), for the three and six months ended April 30, 2017, respectively, and of $(1,790) and $(3,171), for each of the same periods in fiscal 2016, respectively	1,738	5,197	5,593	8,913
Other comprehensive income (loss), net of tax effects	19,744	25,732	25,328	2,312
Comprehensive income	$ 73,050	$ 95,108	$ 165,222	$ 131,723