Stock Compensation - Schedule of Intrinsic Value of Equity Awards Exercised (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jan. 31, 2015	Jan. 31, 2014
Stock Compensation [Abstract]
Intrinsic value of awards exercised	$ 11,517	$ 16,199

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.

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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration