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Investments (Investments Pledged as Collateral) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Number Of Fixed Maturity Securities Pledged As Collateral For Borrowings With Federal Home Loan Bank Of Indianapolis	32
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 59.3
Long-term Federal Home Loan Bank Advances	58
Carrying value bonds on deposit with various state and regulatory agencies	$ 23.3

X

- Definition

This item represents the carrying value of debt securities, both held-to-maturity securities and available-for-sale securities, that are on deposit with various state and regulatory agencies to comply with insurance laws.

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This item contains disclosure of the number of fixed maturity securities that are pledged as collateral for outstanding borrowings with the Federal Home Loan Bank of Indianapolis.

+ References

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- Definition

Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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