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Investments (Details Textuals 3) (USD $)
Sep. 30, 2011
Dec. 31, 2010
Investments [Abstract]  
U.S. and corporate fixed maturity securities exposure to any single issuer in excess of a stated percentage of total investments1.00%1.00%
U.S. and foreign corporate fixed maturity securities exposure amount to any single issuer in excess of 1% than a stated percentage of total investments$ 0$ 0