Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended					9 Months Ended
	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Jul. 31, 2015	Jan. 31, 2015	Jul. 31, 2016	Oct. 31, 2015
Taxes [Line Items]
Statutory federal income tax rate	35.00%					35.00%
Gross unrecognized tax benefits	$ 111,500					$ 111,500
Unrecognized tax benefits that would affect effective tax rate	108,600					108,600
Long-term deferred income taxes	278,225					278,225	$ 273,909	[1]
Fiscal Year 2015 | Internal Revenue Service (IRS)
Taxes [Line Items]
Tax adjustments, settlements, and unusual provisions				$ 7,000
Fiscal Year 2014 | Internal Revenue Service (IRS)
Taxes [Line Items]
Tax adjustments, settlements, and unusual provisions				$ 3,200
Fiscal Year 2012 | Taiwan Taxing Authority
Taxes [Line Items]
Unrecognized tax benefits decrease resulting from settlement					$ 1,100
Fiscal year 2011, 2010, and 2009 | California Franchise Tax Board
Taxes [Line Items]
Reduction in deferred tax asset due to tax settlement			$ 4,900
Unrecognized tax benefits decrease resulting from settlement			10,300
Deferred tax asset, increase (decrease), amount			$ 5,400
Fiscal Year 2011 | Taiwan Taxing Authority
Taxes [Line Items]
Unrecognized tax benefits decrease resulting from settlement	700
Income taxes paid	300
Fiscal2010to2015 | India Taxing Authority
Taxes [Line Items]
Tax adjustments, settlements, and unusual provisions		$ 2,400
Minimum
Taxes [Line Items]
Estimated potential decrease in underlying unrecognized tax benefits	0					0
Maximum
Taxes [Line Items]
Estimated potential decrease in underlying unrecognized tax benefits	$ 20,000					$ 20,000
New Accounting Pronouncement, Early Adoption, Effect
Taxes [Line Items]
Deferred income taxes, current							(95,000)
Long-term deferred income taxes							$ 95,000

[1] Derived from audited financial statements.