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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Reconciliation of Earnings and Number of Shares Used in Calculating Diluted Earnings (Loss) Per Share
The following is a reconciliation of the earnings and number of shares used in calculating the diluted earnings per share for Common Stock and Class A Common Stock (in thousands):

  
Three Months Ended
June 30,
  
Six Months Ended
June 30,
 
  
2015
  
2014
  
2015
  
2014
 
Numerator:
        
Common:
        
Distributed earnings
 
$
1,651
  
$
1,642
  
$
3,297
  
$
3,253
 
Undistributed earnings
  
2,761
   
2,748
   
6,698
   
6,659
 
Basic
  
4,412
   
4,390
   
9,995
   
9,912
 
Class A Common earnings
  
421
   
439
   
957
   
1,046
 
Diluted
 
$
4,833
  
$
4,829
  
$
10,952
  
$
10,958
 
                 
Class A Common:
                
Distributed earnings
 
$
156
  
$
162
  
$
312
  
$
340
 
Undistributed earnings
  
265
   
277
   
645
   
706
 
  
$
421
  
$
439
  
$
957
  
$
1,046
 
Denominator:
                
Common:
                
Weighted average shares outstanding - basic
  
20,600
   
20,454
   
20,585
   
20,307
 
Assumed conversion of Class A Common Stock
  
2,079
   
2,162
   
2,080
   
2,259
 
Dilutive options, awards and common stock equivalents
  
276
   
324
   
302
   
368
 
                 
Total weighted-average diluted Common Stock
  
22,955
   
22,940
   
22,967
   
22,934
 
                 
Class A Common:
                
Weighted average shares outstanding
  
2,079
   
2,162
   
2,080
   
2,259