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Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 08, 2015 | Dec. 08, 2014 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013
Other Events [Abstract] |  |  |  |  |
Dividend payment | $ 0.80 | $ 0.75 |  |  |
Dividend aggregate amount to shareholders | $ 13,900 | $ 13,000 | $ 12,971 | $ 11,005 | $ 9,646
Dividend paid date | Nov. 17, 2015 | Nov. 17, 2014 |  |  |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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