General form of registration statement for all companies including face-amount certificate companies

Income Taxes - Schedule of Unrecognized Tax Benefit Roll-Forward (Details)

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Income Taxes - Schedule of Unrecognized Tax Benefit Roll-Forward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
As of the beginning of the year $ 204 $ 208 $ 193
Increases for tax positions of current years 7 0 15
Reductions for tax positions of prior years (6) (4) 0
As of the end of the year $ 205 $ 204 $ 208