Investments (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Proceeds received from sales of fixed maturities and equity securities
Proceeds received, Fixed maturity securities	$ 298,045	$ 576,708	$ 587,909
Proceeds received, Equity securities	18,643	6,057	1,078
Gross gains realized	29,511	39,941	39,709
Gross losses realized	(5,734)	(12,643)	(1,974)
Fixed Maturity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	17,177	32,532	39,463
Gross losses realized	(4,945)	(11,971)	(2,047)
Equity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	4,368	231	247
Gross losses realized	$ (616)	$ (438)	$ 0