Investments Maturity Distribution of Debt Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 29,996
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	126,518
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	99,265
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	458,358
Available-for-sale Debt Securities, Amortized Cost Basis	714,137	$ 667,966
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value	30,382
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	129,004
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	103,056
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	473,206
Available for Sale Securities, Total	735,648	707,227
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	10,373
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	35,781
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	48,051
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	165,748
Fixed maturities held-to-maturity, at amortized cost	259,953	224,932
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value	10,443
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	37,446
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	49,087
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	167,990
Held-to-maturity Securities, Fair Value	264,966	$ 232,891
Total Fixed maturity securities, Amortized Cost	974,090
Total Fixed Maturity Securities, Fair Value	$ 1,000,614
Number of investments exceeding stocksholder's equity	0
Number of Non-Income Producing Fixed Maturity Securities	0