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Stock Based Compensation (Tables)
6 Months Ended
Jun. 30, 2011
Summary of Stock Option Activity and Related Information

A summary of stock option activity and related information for the six months ended June 30, 2011 is presented below:

 

     Options   Weighted-
Average
Exercise Price
   Aggregate
Intrinsic

Value

Outstanding at January 1, 2011

   5,900   $22.04   

Granted

       

Exercised

   (3,475)   $21.83   

Forfeited

       
  

 

    

Outstanding at June 30, 2011

   2,425   $22.35    $341
  

 

    

Exercisable at June 30, 2011

   2,425   $22.35    $341
  

 

    
Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the six months ended June 30, 2011 is presented below:

 

     Shares    Weighted-
Average
Grant- Date

Fair Value

Nonvested at January 1, 2011

    134,276      $  51.20

Granted

      54,740      $104.07

Vested

   (53,321)    $  47.01

Forfeited

     (2,006)    $  75.91
  

 

  

Nonvested at June 30, 2011

    133,689       $  74.15