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EARNINGS PER SHARE DATA (Tables)
 3 Months Ended
Mar. 31, 2013
EARNINGS PER SHARE DATA [Abstract]  
Computation of Basic and Diluted Earnings per Share
 
The following table sets forth the computation of basic and diluted earnings per share for the periods indicated (in thousands, except  per share data):

   
Three Months Ended
March 31,
 
   
2013
  
2012
 
Basic:
      
Weighted average shares outstanding
  14,395   14,328 
Net income
 $13,232  $11,646 
Convertible preferred stock dividend
  23   23 
Net income attributable to common shareholders
 $13,209  $11,623 
Per share amount
 $0.92  $0.81 
          
Diluted:
        
Weighted average shares outstanding
  14,395   14,328 
Assumed conversion of convertible
 preferred stock
  840   840 
Total dilutive shares
  15,235   15,168 
Net income attributable to
 common shareholders
 $13,209  $11,623 
Convertible preferred stock dividend
  23   23 
Net income for diluted
 earnings per share
 $13,232  $11,646 
Per share amount
 $0.87  $0.77