Fair Value Disclosure (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Debt securities [Abstract]
Debt securities	$ 107,764	$ 101,755
Equity securities [Abstract]
Equity securities	27,108	20,982
Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	24,844	27,392
Obligations of states and political subdivisions	3,862	3,939
Corporate	75,800	67,313
International	3,258	3,111
Debt securities	107,764	101,755
Equity securities [Abstract]
Common stocks	27,108	20,982
Equity securities	27,108	20,982
Total debt and equity securities	134,872	122,737
Level 1 [Member] | Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	13,472	12,464
Obligations of states and political subdivisions	0	0
Corporate	75,800	67,313
International	0	0
Debt securities	89,272	79,777
Equity securities [Abstract]
Common stocks	27,108	20,982
Equity securities	27,108	20,982
Total debt and equity securities	116,380	100,759
Level 2 [Member] | Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	11,372	14,928
Obligations of states and political subdivisions	3,862	3,939
Corporate	0	0
International	3,258	3,111
Debt securities	18,492	21,978
Equity securities [Abstract]
Common stocks	0	0
Equity securities	0	0
Total debt and equity securities	18,492	21,978
Level 3 [Member] | Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	0	0
Obligations of states and political subdivisions	0	0
Corporate	0	0
International	0	0
Debt securities	0	0
Equity securities [Abstract]
Common stocks	0	0
Equity securities	0	0
Total debt and equity securities	$ 0	$ 0