Investments (Securities Pledged) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 0	$ 365
Total liabilities supported by pledged collateral	0	384
Cash Collateral For Loaned Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total liabilities supported by pledged collateral	0	384
Fixed maturities | Available-for-sale
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 0	$ 365