Investments, Summary of Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of realized investment gains (losses) [Abstract]
Gains	$ 1,220	$ 484	$ 3,215	$ 1,101
Losses	(1,650)	0	(1,650)	(304)
Realized investment gains (losses), net	(430)	484	1,565	797
Fixed Maturities [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	1,112	212	1,994	829
Losses	(1,650)	0	(1,650)	(304)
Realized investment gains (losses), net	(538)	212	344	525
Equity Securities [Member]
Summary of realized investment gains (losses) [Abstract]
Gains	108	272	1,221	272
Losses	0	0	0	0
Realized investment gains (losses), net	108	272	1,221	272
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