Fair Value (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fixed maturities: [Abstract]
U.S. government obligations	$ 121,426	$ 113,389
Residential mortgage-backed securities	16,741	13,252
Commercial mortgage-backed securities	25,561	28,565
State and municipal obligations	115,378	115,250
Corporate securities	124,979	134,635
Options embedded in convertible securities	2,737	2,580
Foreign government obligations	27,220	23,879
Total fixed maturities	434,042	431,550
Equity Securities [Abstract]
Financial institutions	19,376	18,850
Industrial & miscellaneous	133,453	126,978
Total equity securities	152,829	145,828
Short term	5,095	4,891
Cash equivalents	61,497	52,002
Total fair value	653,463	634,271
Level 1 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	121,426	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	121,426	113,389
Equity Securities [Abstract]
Financial institutions	19,376	18,850
Industrial & miscellaneous	133,453	126,978
Total equity securities	152,829	145,828
Short term	5,095	4,891
Cash equivalents	0	0
Total fair value	279,350	264,108
Level 2 [Member]
Fixed maturities: [Abstract]
U.S. government obligations	0	0
Residential mortgage-backed securities	16,741	13,252
Commercial mortgage-backed securities	25,561	28,565
State and municipal obligations	115,378	115,250
Corporate securities	124,979	134,635
Options embedded in convertible securities	2,737	2,580
Foreign government obligations	27,220	23,879
Total fixed maturities	312,616	318,161
Equity Securities [Abstract]
Financial institutions	0	0
Industrial & miscellaneous	0	0
Total equity securities	0	0
Short term	0	0
Cash equivalents	61,497	52,002
Total fair value	374,113	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