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           Stockholders' Equity (Details Textual) (USD $) 
        In Thousands, except Per Share data, unless otherwise specified  | 
        6 Months Ended | |||
|---|---|---|---|---|
| 
           Jun. 30, 2014 
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           Jan. 09, 2014 
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           Dec. 31, 2013 
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           Jun. 30, 2014
 
          Common Stock [Member] 
         | 
      |
| Stockholders' Equity [Line Items] | ||||
| Issuance of stock, shares | 2,530 | |||
| Common stock, par or stated value per share | $ 0.01 | $ 0.01 | ||
| Sale of Stock, Price Per Share | $ 45.75 | 
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- Details 
          
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- Definition 
          Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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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. No definition available. 
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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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