Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Net income (loss)	$ 23,625	$ 16,160	$ 25,499	$ (9,934)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain on available-for-sale securities, net of tax	(13)	(43)	(37)	(12)
Change in cumulative translation adjustment	(3,508)	(122)	(6,919)	(4,287)
Other comprehensive income (loss)	(4,342)	218	(11,467)	(4,265)
Total comprehensive income (loss)	19,283	16,378	14,032	(14,199)
Foreign Exchange Forward | Cash Flow Hedging
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized loss on foreign currency forward contracts and forward starting interest rate swaps, net of tax	(154)	383	(1,626)	34
Interest Rate Swap | Cash Flow Hedging | Designated as Hedging Instrument
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized loss on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ (667)	$ 0	$ (2,885)	$ 0