Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Net income (loss)	$ (344,690)	$ 1,261,953	$ 72,584
Other Comprehensive Income (Loss)
Change in unrealized gain (loss) on available-for-sale securities, net of tax	26	(590)	217
Change in accumulated translation adjustments	686	8,012	(1,152)
Other comprehensive income (loss)	5,237	13,312	(2,203)
Total comprehensive income (loss)	(339,453)	1,275,265	70,381
Foreign Currency Forward Contracts
Other Comprehensive Income (Loss)
Change in unrealized gain (loss) on derivatives	(1,674)	(295)	(823)
Interest Rate Swap
Other Comprehensive Income (Loss)
Change in unrealized gain (loss) on derivatives	$ 6,199	$ 6,185	$ (445)