Fair Value (Details) - Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fixed maturities: [Abstract]
U.S. government obligations	$ 103,245	$ 101,094
Residential mortgage-backed securities	4,776	6,066
Commercial mortgage-backed securities	30,595	36,440
State and municipal obligations	110,578	113,777
Corporate securities	161,630	164,068
Options embedded in convertible securities	2,395	2,898
Foreign government obligations	23,965	27,466
Total fixed maturities	437,184	451,809
Equity securities: [Abstract]
Financial institutions	21,694	25,343
Industrial & miscellaneous	123,804	136,764
Total equity securities	145,498	162,107
Short term	2,220	2,966
Cash equivalents	69,517	59,309
Total fair value	654,419	676,191
Level 1 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	0	0
Residential mortgage-backed securities	0	0
Commercial mortgage-backed securities	0	0
State and municipal obligations	0	0
Corporate securities	0	0
Options embedded in convertible securities	0	0
Foreign government obligations	0	0
Total fixed maturities	0	0
Equity securities: [Abstract]
Financial institutions	21,694	25,343
Industrial & miscellaneous	123,804	136,764
Total equity securities	145,498	162,107
Short term	2,220	2,966
Cash equivalents	0	0
Total fair value	147,718	165,073
Level 2 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	103,245	101,094
Residential mortgage-backed securities	4,776	6,066
Commercial mortgage-backed securities	29,226	36,440
State and municipal obligations	110,578	113,777
Corporate securities	146,488	151,860
Options embedded in convertible securities	2,395	2,898
Foreign government obligations	23,683	27,466
Total fixed maturities	420,391	439,601
Equity securities: [Abstract]
Financial institutions	0	0
Industrial & miscellaneous	0	0
Total equity securities	0	0
Short term	0	0
Cash equivalents	69,517	59,309
Total fair value	489,908	498,910
Level 3 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	0	0
Residential mortgage-backed securities	0	0
Commercial mortgage-backed securities	1,369	0
State and municipal obligations	0	0
Corporate securities	15,142	12,208
Options embedded in convertible securities	0	0
Foreign government obligations	282	0
Total fixed maturities	16,793	12,208
Equity securities: [Abstract]
Financial institutions	0	0
Industrial & miscellaneous	0	0
Total equity securities	0	0
Short term	0	0
Cash equivalents	0	0
Total fair value	$ 16,793	$ 12,208