Investments, Part III (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of investments aggregated by industry [Abstract]
Carrying Value	$ 237,627		$ 237,627		$ 240,285
Amortized Cost	230,232		230,232		226,010
Unrealized Gains (Losses)	7,395		7,395		14,275
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	92,466		92,466		47,691
12 months or longer	15,147		15,147		11,985
Total	107,613		107,613		59,676
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	4,153		4,153		1,611
12 months or longer	3,471		3,471		1,384
Total	7,624		7,624		2,995
U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	30,782		30,782		33,898
Amortized Cost	30,595		30,595		32,469
Unrealized Gains (Losses)	187		187		1,429
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	9,498		9,498		3,695
12 months or longer	503		503		2,692
Total	10,001		10,001		6,387
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	242		242		7
12 months or longer	1		1		23
Total	243		243		30
Obligations of States and Political Subdivisions [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	25,720		25,720		11,459
Amortized Cost	25,414		25,414		10,778
Unrealized Gains (Losses)	306		306		681
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	13,237		13,237
12 months or longer	0		0
Total	13,237		13,237
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	415		415
12 months or longer	0		0
Total	415		415
Utilities and Telecom [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	19,033		19,033		15,383
Amortized Cost	17,882		17,882		12,589
Unrealized Gains (Losses)	1,151		1,151		2,794
Financial Services [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	56,399		56,399		65,915
Amortized Cost	54,668		54,668		62,352
Unrealized Gains (Losses)	1,731		1,731		3,563
Other Business - Diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	63,209		63,209		70,365
Amortized Cost	66,183		66,183		69,940
Unrealized Gains (Losses)	(2,974)		(2,974)		425
Other Consumer - Diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	36,655		36,655		36,792
Amortized Cost	29,661		29,661		31,409
Unrealized Gains (Losses)	6,994		6,994		5,383
Other Investment [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	5,829		5,829		6,473
Amortized Cost	5,829		5,829		6,473
Unrealized Gains (Losses)	0		0		0
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	69,731		69,731		43,996
12 months or longer	14,644		14,644		9,293
Total	84,375		84,375		53,289
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	3,496		3,496		1,604
12 months or longer	3,470		3,470		1,361
Total	6,966		6,966		$ 2,965
Common and Non-Redeemable Preferred Stocks [Member]
Schedule of Other Than Temporary Impairments [Abstract]
Investment impairments	$ 0	$ 196	$ 0	$ 196