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Stock-Based Compensation (Table)
6 Months Ended
Jun. 30, 2012
Stock-Based Compensation [Abstract]  
Summary of ESPP share activity
         
    Shares  

Available for future purchases, January 1, 2012

    253,294  

Additional shares reserved under 2009 ESPP

    250,000  

Purchases

    (76,151
   

 

 

 

Available for future purchases, June 30, 2012

    427,143