Subsequent Events - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
Oct. 31, 2012	Mar. 31, 2014	Dec. 31, 2013
Dividends Payable [Line Items]
Dividend declared, per share		$ 0.28	$ 0.28
Dividend declared, declaration date	Apr. 14, 2014	Apr. 15, 2014
Dividend declared, payable date	Jun. 10, 2014	Jun. 10, 2014
Dividend declared, record date	May 20, 2014	May 20, 2014

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

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

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

+ References

+ Details

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Details

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