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Investments Cash, Cash Equivalents and Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]        
Fixed maturity securities $ 1,175,341 $ 1,128,672    
Fixed maturity securities percent 90.40% 89.70%    
Available-for-sale Securities, Equity Securities $ 16,143 $ 18,159    
Equity securities percent 1.20% 1.60%    
Mortgage loans $ 198 $ 232    
Mortgage loans percent 0.00% 0.00%    
Policy loans $ 69,382 $ 66,672    
Policy loans percent 5.30% 5.30%    
Real estate and other long-term investments $ 5,906 $ 7,896    
Real estate and other long-term investments percent 0.50% 0.60%    
Short-term Investments $ 0 $ 508    
Percentage of Short Term Investments As to Carrying Value 0.00% 0.00%    
Cash and cash equivalents $ 33,749 $ 35,510 $ 52,937 $ 82,827
Cash and cash equivalents percent 2.60% 2.80%    
Total cash, cash equivalents and investments $ 1,300,719 $ 1,257,649    
Total cash, cash equivalents and investments percent 100.00% 100.00%