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Earnings Per Common Share (Tables)
6 Months Ended
Jun. 30, 2012
Earnings Per Common Share [Abstract]  
Summary of Earnings Per Common Share
                                 
    For the Three Months Ended
June 30,
    For the Six Months Ended
June 30,
 

(unaudited, in thousands, except shares and per share amounts)

  2012     2011     2012     2011  

Numerator for both basic and diluted earnings per common share:

                               

Net income

  $ 11,998     $ 11,918     $ 23,988     $ 22,159  
   

 

 

   

 

 

   

 

 

   

 

 

 
         

Denominator:

                               

Total average basic common shares outstanding

    26,647,050       26,610,450       26,637,537       26,599,791  

Effect of dilutive stock options

    3,275       959       3,342       1,297  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total diluted average common shares outstanding

    26,650,325       26,611,409       26,640,879       26,601,088  
   

 

 

   

 

 

   

 

 

   

 

 

 
         

Earnings per common share - basic

  $ 0.45     $ 0.45     $ 0.90     $ 0.83  

Earnings per common share - diluted

  $ 0.45     $ 0.45     $ 0.90     $ 0.83