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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2016 | Jan. 31, 2016 | Jan. 31, 2015 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013
Income Tax [Line Items] |  |  |  |  |  |  |
Earnings before income taxes of domestic operations |  |  |  | $ 156,723 | $ 140,044 | $ 184,894 |
Additional tax benefit relating to retroactive reinstatement of research credit |  |  |  | 2,200 |  |  |
Additional tax benefit related to dividends paid from foreign earnings tax credit |  | $ 6,184 |  | 6,154 |  |  |
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 |  |
Earnings before income taxes of international operations |  |  |  | 211,771 | 160,818 | 167,619 |
Undistributed earnings aggregated |  |  |  | 757,501 | 712,913 |  |
Total unrecognized tax benefits |  |  |  | 3,336 | 6,258 | $ 5,812 | $ 5,717
Total unrecognized tax benefits impact the effective tax rate |  |  |  | 2,775 | 5,650 |  |
Accrued interest expense related to unrecognized tax benefits |  |  |  | 541 | 2,664 |  |
Tax credit carryforwards |  |  |  | 4,112 |  |  |
Tax credit carryforwards which will expire in 2017 through 2022 |  |  |  | 103 |  |  |
Indefinite tax credit carryforward amount |  |  |  | 4,009 |  |  |
Operating loss carryforwards |  |  |  | 79,616 |  |  |
Indefinite carryforward period |  |  |  | 15,587 |  |  |
Net change in the valuation allowance |  |  |  | 1,537 | $ (904) |  |
Valuation allowance relates to tax credits and loss carryforwards |  |  |  | 8,304 |  |  |
Federal [Member] |  |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |  |
Operating loss carryforwards |  |  |  | 5,273 |  |  |
State [Member] |  |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |  |
Operating loss carryforwards |  |  |  | 73,809 |  |  |
Foreign [Member] |  |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |  |
Operating loss carryforwards |  |  |  | $ 16,121 |  |  |

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