Investments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Proceeds received from sales of fixed maturities and equity securities
Proceeds received, Fixed maturity securities	$ 56,343	$ 191,155	$ 270,329	$ 470,684
Proceeds received, Equity securities	3,742	1,970	14,875	2,894
Fixed Maturity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	1,807	10,528	16,197	27,891
Gross losses realized	(4,117)	(139)	(4,598)	(11,968)
Equity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	531	67	3,875	84
Gross losses realized	$ (103)	$ (157)	$ (490)	$ (233)