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Investments (Details 6) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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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

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