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EARNINGS PER SHARE (Tables)
 6 Months Ended
Jun. 30, 2015
EARNINGS PER SHARE [Abstract]  
Earnings and weighted-average shares outstanding used in the computation of basic and diluted earnings per share
The following table sets forth the calculation of basic and diluted net earnings per common share under the two-class method for the three and six months ended June 30, 2015 and 2014:


   
Three Months Ended
  
Six Months Ended
 
  
June 30,
  
June 30,
 
  
2015
  
2014
  
2015
  
2014
 
         
Numerator:
        
Net earnings
 
$
6,062
  
$
3,065
  
$
11,382
  
$
5,568
 
Less dividends declared:
                
     Class A
  
130
   
131
   
261
   
261
 
     Class B
  
682
   
653
   
1,360
   
1,307
 
Undistributed earnings
 
$
5,250
  
$
2,281
  
$
9,761
  
$
4,000
 
                 
Undistributed earnings allocation - basic and diluted:
                
     Class A undistributed earnings
 
$
924
  
$
414
  
$
1,720
  
$
726
 
     Class B undistributed earnings
  
4,326
   
1,867
   
8,041
   
3,274
 
     Total undistributed earnings
 
$
5,250
  
$
2,281
  
$
9,761
  
$
4,000
 
                 
Net earnings allocation - basic and diluted:
                
     Class A net earnings
 
$
1,054
  
$
545
  
$
1,981
  
$
987
 
     Class B net earnings
  
5,008
   
2,520
   
9,401
   
4,581
 
     Net earnings
 
$
6,062
  
$
3,065
  
$
11,382
  
$
5,568
 
                 
Denominator:
                
Weighted-average shares outstanding:
                
     Class A - basic and diluted
  
2,175
   
2,175
   
2,175
   
2,175
 
     Class B - basic and diluted
  
9,693
   
9,332
   
9,682
   
9,333
 
                 
Net earnings per share:
                
     Class A - basic and diluted
 
$
0.49
  
$
0.25
  
$
0.91
  
$
0.45
 
     Class B - basic and diluted
 
$
0.52
  
$
0.27
  
$
0.97
  
$
0.49