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Quarterly Financial Data (Unaudited) - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | ---
Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Jan. 31, 2015 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Severance and restructuring costs | $ 6,411 | $ 1,714 | $ 1,633 | $ 1,017 | $ 9,092 | $ 2,319 |  | $ 10,775 | $ 11,411 | $ 2,551 | $ 16,621
Other expense related to reversal of indemnification asset resulting from effective settlement of tax exam |  | 2,722 |  |  |  |  |  |  |  |  |
Discrete tax benefit related to effective settlement of tax exam |  | $ 1,651 | 1,136 |  |  |  |  |  |  |  |
Other income on legal settlement. |  |  | 800 |  | $ 1,608 |  |  |  |  |  |
Favorable adjustment to unrecognized tax benefits |  |  | $ 1,192 |  |  |  |  | 2,682 |  |  |
Additional tax benefit relating to retroactive reinstatement of research and development credit |  |  |  | 2,025 |  |  | $ 1,786 |  | $ 2,486 |  |
Additional tax benefit related to dividends paid from foreign earnings tax credit |  |  |  | $ 6,184 |  |  |  | $ 6,154 |  |  |
Pre-tax loss on pension settlement |  |  |  |  |  |  | $ (1,572) |  |  |  |

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- Definition Additional income tax benefit due to effective settlement of tax examination. + References No definition available. + Details
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- Definition Additional tax benefit related to dividends paid from foreign earnings tax credit. + References No definition available. + Details
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- Definition Additional tax benefit related to retroactive reinstatement of research and development tax credit. + References No definition available. + Details
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- Definition Reversal of indemnification asset from effective tax settlement. + References No definition available. + Details
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- Definition Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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