| 
           Stock Plans (Details Textual) (USD $) 
         | 
        3 Months Ended | |
|---|---|---|
| 
           Mar. 31, 2013 
         | 
        
           Mar. 31, 2012 
         | 
      |
| Stock Plans (Additional Textual) [Abstract] | ||
| Recognized tax benefit related to stock-based compensation expense | $ 0 | |
| Options or awards were granted | 0 | |
| Weighted-average fair value of options and awards granted | $ 1.09 | |
| Unrecognized compensation expense related to non-vested stock options | $ 100,000 | |
| Weighted-average period for recognizing non-vested stock option | 3 months 18 days | |
| 
           Restricted stock [Member] 
         | 
        ||
| Stock Plans (Textual) [Abstract] | ||
| Restricted stock awarded to employees | 0 | |
| X | ||||||||||
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- Definition 
          Employee service share based compensation nonvested stock options compensation cost not yet recognized. No definition available. 
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- Definition 
          Employee service share based compensation nonvested stock options compensation cost not yet recognized period for recognition. No definition available. 
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- Details 
          
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- Details 
          
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- Definition 
          The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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