CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Net income (loss)	$ 3,861	$ (11,546)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain (loss) on available-for-sale securities, net of tax	(249)	22
Change in cumulative translation adjustments	490	(2,823)
Other comprehensive income (loss)	6,158	(5,650)
Total comprehensive income (loss)	10,019	(17,196)
Change in unrealized gain (loss) on foreign currency forward contracts, net of tax
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	1,425	(2,520)
Change in unrealized gain (loss) on forward starting interest rate swap, net of tax
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ 4,492	$ (329)