Investments (Securities Pledged) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Financial Instruments Owned and Pledged as Collateral [Line Items]
Financial Instruments Owned and Pledged as Collateral	$ 37,533,000	$ 121,631,000
Fixed Maturities, Available For Sale [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Financial Instruments Owned and Pledged as Collateral	37,533,000	121,631,000
Other Trading Account Assets [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Financial Instruments Owned and Pledged as Collateral	0	0
Cash Collateral For Loaned Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Financial Instruments Owned and Pledged as Collateral, Associated Liabilities	$ 39,000,000	$ 125,900,000