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Subsequent Events - Additional Information (Detail) (USD $) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2014 Scenario, Forecast [Member] | Dec. 31, 2013 Dividend Declared [Member] | Feb. 25, 2014 Dividend Declared [Member] Subsequent Event [Member]
Subsequent Event [Line Items] |  |  |  |
Cash dividend per share | $ 0.08 |  | $ 0.08 | $ 0.12
Special cash dividend per share |  |  |  | $ 0.50
Date of payment to shareholders entitled to dividends |  |  | Mar. 28, 2014 |
Date of record of shareholders entitled to dividends |  |  | Mar. 14, 2014 |
Expected cash dividend per share |  | $ 0.48 |  |

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- Definition Expected Cash Dividend Per Share + References No definition available. + Details
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- Definition Special Cash Dividend Per Share + References No definition available. + Details
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + 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 + Details
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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 + 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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