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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

Dividend Paid Date Day Month And Year

+ References

No definition available.

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- Definition

Other Events [Abstract]

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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

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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

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