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Investments (Details 4) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Proceeds received from sales of fixed maturities and equity securities        
Proceeds received, Fixed maturity securities $ 98,942 $ 56,343 $ 198,191 $ 270,329
Proceeds received, Equity securities 3,489 3,742 11,980 14,875
Fixed Maturity Securities [Member]
       
Proceeds received from sales of fixed maturities and equity securities        
Gross gains realized 5,871 1,807 9,998 16,197
Gross losses realized (4,421) (4,117) (5,399) (4,598)
Equity Securities [Member]
       
Proceeds received from sales of fixed maturities and equity securities        
Gross gains realized 722 531 2,196 3,875
Gross losses realized $ (86) $ (103) $ (267) $ (490)