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Investments Cash, Cash Equivalents and Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]        
Fixed maturity securities $ 1,059,265 $ 995,601    
Fixed maturity securities percent 88.30% 85.00%    
Available-for-sale Securities, Equity Securities $ 23,548 $ 23,438    
Equity securities percent 2.00% 2.00%    
Mortgage loans $ 587 $ 594    
Mortgage loans percent 0.00% 0.10%    
Policy loans $ 62,011 $ 60,166    
Policy loans percent 5.20% 5.10%    
Real estate and other long-term investments $ 7,988 $ 8,031    
Real estate and other long-term investments percent 0.70% 0.70%    
Other Short-term Investments $ 0 $ 251    
Percentage of Short Term Investments As to Carrying Value 0.00% 0.00%    
Cash and cash equivalents $ 45,355 $ 82,827 $ 41,430 $ 50,708
Cash and cash equivalents percent 3.80% 7.10%    
Total cash, cash equivalents and investments $ 1,198,754 $ 1,170,908    
Total cash, cash equivalents and investments percent 100.00% 100.00%