Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Net income (loss)	$ 13,856	$ 38,026	$ (459,507)	$ 41,887
Change in unrealized loss on available-for-sale securities, net of tax	(76)	(278)	(337)	(527)
Change in cumulative translation adjustments	(7,133)	(2,243)	1,069	(1,753)
Other comprehensive income	(7,447)	(3,015)	5,945	3,143
Total comprehensive income (loss)	6,409	35,011	(453,562)	45,030
Change in unrealized gain on foreign currency forward contracts, net of tax
Change in unrealized gain on foreign currency forward contracts and forward starting interest rate swaps, net of tax	(2,537)	(899)	(35)	526
Change in unrealized gain on forward starting interest rate swap, net of tax
Change in unrealized gain on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ 2,299	$ 405	$ 5,248	$ 4,897