Fair Value Disclosure (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt securities [Abstract]
Debt securities	$ 275,387	$ 174,912
Equity securities [Abstract]
Equity securities	36,463	38,584
Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	55,643	27,209
Obligations of states and political subdivisions	91,641	52,064
Corporate	117,150	91,941
International	10,953	3,698
Debt securities	275,387	174,912
Equity securities [Abstract]
Common stocks	36,463	38,584
Equity securities	36,463	38,584
Total debt and equity securities	311,850	213,496
Level 1 [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	36,463	38,584
Equity securities	36,463	38,584
Total debt and equity securities	36,463	38,584
Level 2 [Member] | Recurring [Member]
Debt securities [Abstract]
United States government obligations and authorities	55,643	27,209
Obligations of states and political subdivisions	91,641	52,064
Corporate	117,150	91,941
International	10,953	3,698
Debt securities	275,387	174,912
Equity securities [Abstract]
Common stocks	0	0
Equity securities	0	0
Total debt and equity securities	275,387	174,912
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