Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Net income (loss)	$ 86,749	$ 50,840	$ 173,103	$ (408,667)
Change in unrealized gain (loss) on available-for-sale securities, net of tax	168	279	581	(59)
Change in cumulative translation adjustments	1,943	(3,230)	(1,903)	(2,161)
Other comprehensive income (loss)	(4,558)	(3,633)	(17,984)	2,312
Total comprehensive income (loss)	82,191	47,207	155,119	(406,355)
Change in unrealized gain (loss) on foreign currency forward contracts, net of tax
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	2,047	(1,032)	2,751	(1,067)
Change in unrealized gain (loss) on forward starting interest rate swap, net of tax
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ (8,716)	$ 350	$ (19,413)	$ 5,599