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Taxes - Provision for Income Taxes and Effective Tax Rates (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Income Tax Disclosure [Abstract]
Income before income taxes	$ 70,771	$ 58,172	$ 210,014	$ 216,609
Provision (benefit) for income tax	$ 5,115	$ 5,875	$ 13,345	$ 25,699
Effective tax rate	7.20%	10.10%	6.40%	11.90%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Topic 235

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-Section S99

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-Subparagraph (SX 210.4-08.(h)(2))

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Number 210

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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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