Investments (Securities Pledged) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 365	$ 16,825
Total liabilities supported by pledged collateral	384	17,383
Cash Collateral For Loaned Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total liabilities supported by pledged collateral	384	17,383
Fixed maturities | Available-for-sale
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 365	$ 16,825