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Stockholders' Equity (Details Textual) (USD $) | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2012 | Jul. 31, 2012 | Dec. 31, 2011
Stockholders' Equity Attributable to Parent [Abstract] |  |  |
Issuance of stock, shares | 2,645,000 |  |
Common stock, par or stated value per share | $ 0.01 |  | $ 0.01
Sale of stock, price per share |  | $ 34.75 |

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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section H + Details
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