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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.

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31917-109318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31928-109318 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31958-109318 + Details
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