Investments, Summary of Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Summary of realized investment gains (losses) [Abstract]
Gains	$ 1,385	$ 370
Losses	0	0
Realized investment gains (losses), net	1,385	370
Fixed Maturities [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	272	370
Losses	0	0
Realized investment gains (losses), net	272	370
Equity Securities [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	1,113	0
Losses	0	0
Realized investment gains (losses), net	1,113	0
Other Invested Assets [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	0	0
Losses	0	0
Realized investment gains (losses), net	$ 0	$ 0