Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended
Oct. 26, 2012
Debt Instrument [Line Items]
Cash dividend amount (in dollars per share)	$ 0.175
Declared dividend payment date	Dec. 18, 2012
Declared dividend date of record	Dec. 04, 2012

Date the declared dividend will be paid, in CCYY-MM-DD format.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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Period Type:	duration