Stockholders' Equity (Details) - USD ($)	Jul. 31, 2018	Dec. 07, 2017	Oct. 31, 2017
Class of Stock [Line Items]
Effect of adoption of new accounting standard			$ 62,123,000
Deferred tax asset, net	$ 724,087,000		1,155,104,000
Stock repurchase program authorized amount		$ 300,000,000
ASU 2016-09, Excess tax benefit component
Class of Stock [Line Items]
Deferred tax asset, net			62,100,000
Retained earnings
Class of Stock [Line Items]
Effect of adoption of new accounting standard			61,291,000
Retained earnings | ASU 2016-09, Excess tax benefit component
Class of Stock [Line Items]
Effect of adoption of new accounting standard			62,100,000
Retained earnings | ASU 2016-09, Forfeiture rate component
Class of Stock [Line Items]
Effect of adoption of new accounting standard			$ 800,000