Net Investment Income (Tables)
 12 Months Ended
Dec. 31, 2016
Net Investment Income [Abstract]  
Components of Net Investment Income
Interest and/or dividend income from:

  
Years ended December 31
 
  
2016
  
2015
  
2014
 
          
Fixed maturities
 
$
37,139
  
$
36,256
  
$
38,559
 
Equity securities
  
9,666
   
7,146
   
7,660
 
Policy loans
  
619
   
557
   
545
 
Cash equivalents and interest-bearing deposits
  
257
   
143
   
117
 
Other
  
1,232
   
1,072
   
659
 
Total
 
$
48,913
  
$
45,174
  
$
47,540