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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2019
Segment Information [Abstract]  
Segment Revenues
The following table summarizes segment revenues for the years ended December 31:

  
2019
  
2018
  
2017
 
Revenues:
         
Net premiums earned
 
$
447,288
  
$
432,880
  
$
328,145
 
Net investment income
  
26,249
   
22,048
   
18,095
 
Net realized and unrealized gains (losses) on investments
  
12,889
   
(25,691
)
  
19,686
 
Commissions and other income
  
9,171
   
9,932
   
5,308
 
Total revenues
 
$
495,597
  
$
439,169
  
$
371,234