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Investments (Investments Pledged as Collateral) (USD $)
Dec. 31, 2011
securities
Sep. 30, 2011
Investments [Abstract]    
Number of fixed maturity securities pledged as collateral for borrowings with the Federal Home Loan Bank of Indianapolis 26  
Fixed maturity security pledged at carrying value $ 64,600,000  
Outstanding borrowing with the Federal Home Loan Bank of Indianapolis $ 58,000,000 $ 13,000,000