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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2012
Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the year ended December 31, 2012 is presented below:

 

     Shares     Weighted-
Average
Grant-Date

Fair Value
 

Nonvested at January 1, 2012

     129,082      $ 75.00   

Granted

     74,460      $ 105.22   

Vested

     (74,887   $ 62.71   

Forfeited

     (12,933   $ 101.02   
  

 

 

   

Nonvested at December 31, 2012

     115,722      $ 99.50