Fair Value (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fixed maturities: [Abstract]
U.S. government obligations	$ 119,517	$ 113,389
Residential mortgage-backed securities	7,935	13,252
Commercial mortgage-backed securities	26,618	28,565
State and municipal obligations	114,212	115,250
Corporate securities	132,496	134,635
Options embedded in convertible securities	2,939	2,580
Foreign government obligations	25,743	23,879
Total fixed maturities	429,460	431,550
Equity Securities [Abstract]
Financial institutions	20,456	18,850
Industrial & miscellaneous	140,470	126,978
Total equity securities	160,926	145,828
Short term	3,162	4,891
Cash equivalents	70,482	52,002
Total fair value	664,030	634,271
Level 1 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	119,517	113,389
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	119,517	113,389
Equity Securities [Abstract]
Financial institutions	20,456	18,850
Industrial & miscellaneous	140,470	126,978
Total equity securities	160,926	145,828
Short term	3,162	4,891
Cash equivalents	0	0
Total fair value	283,605	264,108
Level 2 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	0	0
Residential mortgage-backed securities	7,935	13,252
Commercial mortgage-backed securities	26,618	28,565
State and municipal obligations	114,212	115,250
Corporate securities	132,496	134,635
Options embedded in convertible securities	2,939	2,580
Foreign government obligations	25,743	23,879
Total fixed maturities	309,943	318,161
Equity Securities [Abstract]
Financial institutions	0	0
Industrial & miscellaneous	0	0
Total equity securities	0	0
Short term	0	0
Cash equivalents	70,482	52,002
Total fair value	380,425	370,163
Level 3 [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	0	0
Industrial & miscellaneous	0	0
Total equity securities	0	0
Short term	0	0
Cash equivalents	0	0
Total fair value	$ 0	$ 0