Condensed Consolidated Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 16,160	$ (1,231)	$ (9,934)	$ (75,634)
Change in unrealized gain (loss) on available-for-sale securities, net of tax	(43)	14	(12)	(17)
Change in unrealized gain (loss) on foreign currency forward contracts, net of tax	383	(508)	34	(625)
Change in cumulative translation adjustment	(122)	(1,498)	(4,287)	(2,542)
Other comprehensive income (loss)	218	(1,992)	(4,265)	(3,184)
Total comprehensive income (loss)	$ 16,378	$ (3,223)	$ (14,199)	$ (78,818)