Investments, Part III (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of investments aggregated by industry [Abstract]
Carrying Value	$ 236,027	$ 238,385
Amortized Cost	227,471	231,333
Unrealized Gains (Losses)	8,556	7,052
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	40,718	104,770
12 months or longer	30,913	18,374
Total	71,631	123,144
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1,831	4,956
12 months or longer	6,229	5,103
Total	8,060	10,059
U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	18,445	22,234
Amortized Cost	18,007	22,119
Unrealized Gains (Losses)	438	115
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	2,626	9,209
12 months or longer	501	2,243
Total	3,127	11,452
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	10	120
12 months or longer	1	55
Total	11	175
Obligations of States and Political Subdivisions [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	18,046	25,479
Amortized Cost	17,268	25,410
Unrealized Gains (Losses)	778	69
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	0	16,079
12 months or longer	5,010	0
Total	5,010	16,079
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	552
12 months or longer	36	0
Total	36	552
Utilities and Telecom [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	19,239	18,975
Amortized Cost	17,400	17,888
Unrealized Gains (Losses)	1,839	1,087
Financial Services [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	63,576	59,463
Amortized Cost	61,654	58,167
Unrealized Gains (Losses)	1,922	1,296
Other Business - Diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	66,603	61,158
Amortized Cost	69,901	66,176
Unrealized Gains (Losses)	(3,298)	(5,018)
Other Consumer - Diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	40,919	41,146
Amortized Cost	34,042	31,643
Unrealized Gains (Losses)	6,877	9,503
Other Investment [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	9,199	9,930
Amortized Cost	9,199	9,930
Unrealized Gains (Losses)	0	0
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	38,092	79,482
12 months or longer	25,402	16,131
Total	63,494	95,613
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1,821	4,284
12 months or longer	6,192	5,048
Total	$ 8,013	$ 9,332