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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2015
Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the year ended December 31, 2015 is presented below:

 

     Shares      Weighted-
Average
Grant-Date
Fair Value
Per Share
 

Nonvested at January 1, 2015

     147,489       $ 99.51   

Granted

     225,487       $ 34.62   

Vested

     (70,089    $ 98.59   

Forfeited

     (36,735    $ 51.62   
  

 

 

    

Nonvested at December 31, 2015

     266,152       $ 51.39