Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Net income (loss)	$ (473,363)	$ 3,861
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized loss on available-for-sale securities, net of tax	(261)	(249)
Change in cumulative translation adjustments	8,202	490
Other comprehensive income	13,392	6,158
Total comprehensive income (loss)	(459,971)	10,019
Change in unrealized gain on foreign currency forward contracts, net of tax
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain on foreign currency forward contracts and forward starting interest rate swaps, net of tax	1,553	1,425
Change in unrealized gain on forward starting interest rate swap, net of tax
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in unrealized gain on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ 3,898	$ 4,492