Investments, Summary of Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Summary of realized investment gains (losses) [Abstract]
Gains	$ 610	$ 247	$ 1,995	$ 617
Losses	0	(304)	0	(304)
Realized investment gains (losses), net	610	(57)	1,995	313
Fixed Maturities [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	610	247	882	617
Losses	0	(304)	0	(304)
Realized investment gains (losses), net	610	(57)	882	313
Equity Securities [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	0	0	1,113	0
Losses	0	0	0	0
Realized investment gains (losses), net	0	0	1,113	0
Other Invested Assets [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	0	0	0	0
Losses	0	0	0	0
Realized investment gains (losses), net	$ 0	$ 0	$ 0	$ 0