Investments, Part III (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of investments aggregated by industry [Abstract]
Carrying Value	$ 226,752	$ 240,285
Amortized Cost	215,621	226,010
Unrealized Gains (Losses)	11,131	14,275
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	106,096	47,691
12 months or longer	12,426	11,985
Total	118,522	59,676
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months	3,466	1,611
12 months or longer	1,691	1,384
Total	5,157	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	26,506	33,898
Amortized Cost	26,710	32,469
Unrealized Gains (Losses)	(204)	1,429
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	15,390	3,695
12 months or longer	503	2,692
Total	15,893	6,387
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months	537	7
12 months or longer	1	23
Total	538	30
Obligations of States and Political Subdivisions [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	24,642	11,459
Amortized Cost	24,946	10,778
Unrealized Gains (Losses)	(304)	681
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	19,491
12 months or longer	0
Total	19,491
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months	848
12 months or longer	0
Total	848
Utilities and Telecom [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	19,053	15,383
Amortized Cost	17,361	12,589
Unrealized Gains (Losses)	1,692	2,794
Financial Services [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	54,707	65,915
Amortized Cost	52,963	62,352
Unrealized Gains (Losses)	1,744	3,563
Other Business - Diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	59,460	70,365
Amortized Cost	60,113	69,940
Unrealized Gains (Losses)	(653)	425
Other Consumer - Diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	36,565	36,792
Amortized Cost	27,709	31,409
Unrealized Gains (Losses)	8,856	5,383
Other Investment [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	5,819	6,473
Amortized Cost	5,819	6,473
Unrealized Gains (Losses)	0	0
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	70,215	43,996
12 months or longer	11,923	9,293
Total	82,138	53,289
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months	2,065	1,604
12 months or longer	1,690	1,361
Total	3,755	$ 2,965
Common and Non-Redeemable Preferred Stocks [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	1,000
12 months or longer	0
Total	1,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months	16
12 months or longer	0
Total	$ 16