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Segment Information (Tables)
3 Months Ended
Mar. 31, 2017
Segment Information [Abstract]  
Summary of segment revenues
The following table summarizes segment revenues for the three months ended March 31, 2017 and 2016:

  
Three Months Ended
 
  
March 31
 
  
2017
  
2016
 
       
Revenues:
      
Net premiums earned
 
$
73,974
  
$
66,909
 
Net investment income
  
3,692
   
3,440
 
Net realized gains on investments
  
6,294
   
9,012
 
Other
  
981
   
1,364
 
Total revenues
 
$
84,941
  
$
80,725