Investments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Proceeds received from sales of fixed maturities and equity securities
Proceeds received, Fixed maturity securities	$ 114,804	$ 121,228	$ 213,986	$ 279,529
Proceeds received, Equity securities	6,299	915	11,133	924
Fixed Maturity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	9,878	8,471	14,390	17,362
Gross losses realized	(471)	(2,684)	(481)	(11,829)
Equity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	2,776	8	3,344	17
Gross losses realized	$ (172)	$ (76)	$ (387)	$ (76)