Investments, Securities with Continuous Unrealized Loss Postion (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 31,018	$ 104,770
12 months or longer	22,725	18,374
Total	53,743	123,144
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	472	4,956
12 months or longer	2,998	5,103
Total	3,470	10,059
Fixed Maturities - U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	11,987	9,209
12 months or longer	501	2,243
Total	12,488	11,452
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	80	120
12 months or longer	0	55
Total	80	175
Fixed Maturities - Obligations of States and Political Subdivisions [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months		16,079
12 months or longer		0
Total		16,079
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months		552
12 months or longer		0
Total		552
Fixed Maturities - Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	19,031	79,482
12 months or longer	22,224	16,131
Total	41,255	95,613
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	392	4,284
12 months or longer	2,998	5,048
Total	$ 3,390	$ 9,332