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Dividend Reinvestment Plan (Details Textual) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Dividend Reinvestment Plan (Textual) [Abstract] |  |  |
Number of Business days | 10 days |  |
Issuance of common stock dividend reinvestment plan, shares | 0 | 6,748 | 17,180

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- Definition Number of consecutive trading days for purchase of common share. + References No definition available. + Details
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- Definition Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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