Fair Value Disclosure (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt securities [Abstract]
Debt securities	$ 316,577	$ 284,099
Equity securities [Abstract]
Equity securities	43,004	39,247
Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	67,834	62,323
Obligations of states and political subdivisions	100,284	91,614
Corporate	147,956	119,024
International	503	11,138
Debt securities	316,577	284,099
Equity securities [Abstract]
Common stocks	43,004	39,247
Equity securities	43,004	39,247
Total debt and equity securities	359,581	323,346
Level 1 [Member] | Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	43,480	46,002
Obligations of states and political subdivisions	0	0
Corporate	0	0
International	0	0
Debt securities	43,480	46,002
Equity securities [Abstract]
Common stocks	43,004	39,247
Equity securities	43,004	39,247
Total debt and equity securities	86,484	85,249
Level 2 [Member] | Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	24,354	16,321
Obligations of states and political subdivisions	100,284	91,614
Corporate	147,956	119,024
International	503	11,138
Debt securities	273,097	238,097
Equity securities [Abstract]
Common stocks	0	0
Equity securities	0	0
Total debt and equity securities	273,097	238,097
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