Investments, Securities with Continuous Unrealized Loss Postion (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 16,824	$ 104,770
12 months or longer	32,997	18,374
Total	49,821	123,144
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	288	4,956
12 months or longer	4,467	5,103
Total	4,755	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	2,020	9,209
12 months or longer	0	2,243
Total	2,020	11,452
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1	120
12 months or longer	0	55
Total	1	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	14,804	79,482
12 months or longer	32,997	16,131
Total	47,801	95,613
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	287	4,284
12 months or longer	4,467	5,048
Total	$ 4,754	$ 9,332