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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Reconciliation of income tax benefit [Abstract]    
Federal income tax provision at statutory rate of 21% and 35% for 2018 and 2017, respectively $ (1,334) $ (121)
Dividends-received deduction (10) (24)
Other permanent differences 17 19
Income tax benefit $ (1,327) $ (126)
Federal statutory income tax rate 21.00% 35.00%
Components of income tax benefit [Abstract]    
Current - Federal $ 36 $ 0
Deferred - Federal (1,363) (126)
Income tax benefit $ (1,327) $ (126)