Investments, Part III (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Schedule of investments aggregated by industry [Abstract]
Carrying Value	$ 202,734	$ 246,892
Amortized Cost	191,625	216,642
Unrealized Gains	11,109	30,250
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	59,337	13,516
12 months or longer	2,902	1,600
Total	62,239	15,116
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	3,080	189
12 months or longer	98	400
Total	3,178	589
U.S. Treasury securities and obligations of U.S. Government agencies and authorities [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	13,659	27,512
Amortized Cost	12,618	22,894
Unrealized Gains	1,041	4,618
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	3,229
12 months or longer	0
Total	3,229
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	52
12 months or longer	0
Total	52
Obligations of states and political subdivisions [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	11,363	17,761
Amortized Cost	10,284	15,247
Unrealized Gains	1,079	2,514
Utilities and telecom [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	18,978	19,219
Amortized Cost	16,646	15,757
Unrealized Gains	2,332	3,462
Financial services [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	52,067	56,077
Amortized Cost	50,170	51,702
Unrealized Gains	1,897	4,375
Other business - diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	54,566	66,875
Amortized Cost	53,963	59,628
Unrealized Gains	603	7,247
Other consumer - diversified [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	47,889	55,269
Amortized Cost	43,732	47,235
Unrealized Gains	4,157	8,034
Other Investment [Member]
Schedule of investments aggregated by industry [Abstract]
Carrying Value	4,212	4,179
Amortized Cost	4,212	4,179
Unrealized Gains	0	0
Corporate securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	52,021	8,806
12 months or longer	1,927	1,600
Total	53,948	10,406
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	2,953	147
12 months or longer	73	400
Total	3,026	547
Redeemable preferred stocks [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	1,142	1,216
12 months or longer	0	0
Total	1,142	1,216
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	4	3
12 months or longer	0	0
Total	4	3
Common and non-redeemable preferred stocks [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	2,945	3,494
12 months or longer	975	0
Total	3,920	3,494
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	71	39
12 months or longer	25	0
Total	$ 96	$ 39