Stock-Based Compensation - Additional Information (Detail)	6 Months Ended	12 Months Ended
Apr. 30, 2014	Oct. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock options granted	0	0

Gross number of share options (or share units) granted during the period.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration