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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Reconciliation of Earnings and Number of Shares Used in Calculating Diluted Earnings (Loss) Per Share
  
Three Months Ended
March 31,
 
  
2016
  
2015
 
Numerator:
    
Common:
    
Distributed earnings
 
$
2,012
  
$
1,646
 
Undistributed earnings
  
2,248
   
3,938
 
Basic
  
4,260
   
5,584
 
Class A Common earnings
  
409
   
535
 
Diluted
 
$
4,669
  
$
6,119
 
         
Class A Common:
        
Distributed earnings
 
$
193
  
$
156
 
Undistributed earnings
  
216
   
379
 
  
$
409
  
$
535
 
Denominator:
        
Common:
        
Weighted average shares outstanding - basic
  
20,121
   
20,569
 
Assumed conversion of Class A Common Stock
  
2,031
   
2,081
 
Dilutive options, awards and common stock equivalents
  
344
   
327
 
         
Total weighted-average diluted Common Stock
  
22,496
   
22,977
 
         
Class A Common:
        
Weighted average shares outstanding
  
2,031
   
2,081