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Employee Benefit Plans - Pretax Intrinsic Value of Options Exercised and Their Average Exercise Prices (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Intrinsic value	$ 51,408	$ 44,104	$ 32,094
Average exercise price per share	$ 30.06	$ 26.06	$ 24.47

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- References

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

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