Investments (Details 4) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Proceeds received from sales of fixed maturities and equity securities
Proceeds received, Fixed maturity securities	$ 165,201	$ 46,309	$ 246,521	$ 99,249
Proceeds received, Equity securities	6,840	4,843	20,809	8,491
Fixed Maturity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	10,577	2,600	12,231	4,127
Gross losses realized	(1,282)	(303)	(1,745)	(978)
Equity Securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	596	995	5,198	1,474
Gross losses realized	$ (107)	$ (64)	$ (117)	$ (181)