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Investments (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Proceeds received from sales of fixed maturities and equity securities
Proceeds received, Fixed maturity securities	$ 445,100	$ 261,696	$ 298,045
Proceeds received, Equity securities	31,621	17,194	18,643
Fixed maturity securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	22,476	13,224	17,177
Gross losses realized	(5,487)	(6,325)	(4,945)
Equity securities [Member]
Proceeds received from sales of fixed maturities and equity securities
Gross gains realized	6,604	3,206	4,368
Gross losses realized	$ (672)	$ (482)	$ (616)

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