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Stockholders' Equity (Details Textual) (USD $)
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3 Months Ended | ||
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Sep. 30, 2012
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Jul. 31, 2012
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Dec. 31, 2011
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| 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 |
| X | ||||||||||
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- Definition
Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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