Unaudited Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 55,596	$ 63,317	$ 120,785	$ 131,013
Other comprehensive income (loss):
Change in foreign currency translation adjustment	3,677	2,634	(19,778)	(11,215)
Changes in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented	12	0	30	0
Cash flow hedges:
Deferred gains (losses), net of tax of $668 and $5,513, for the three and six months ended April 30, 2015, respectively, and of $(873) and $456 for each of the same periods in fiscal 2014, respectively	(1,345)	3,064	(14,120)	2,489
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $(3,018) and $(3,408), for the three and six months ended April 30, 2015, respectively, and of $(1,798) and $(1,504), for each of the same periods in fiscal 2014, respectively	6,371	874	7,427	(2,432)
Other comprehensive income (loss), net of tax effects	8,715	6,572	(26,441)	(11,158)
Comprehensive income	$ 64,311	$ 69,889	$ 94,344	$ 119,855