Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains (losses) arising during the period, before income taxes	$ 8,873	$ (6,092)
Income Taxes	(1,863)	1,279
Unrealized gains (losses) arising during the period, net of income tax	7,010	(4,813)
Less reclassification adjustment [Abstract]
Net realized investment gains on fixed-maturity securities, before income taxes	292	55
Income taxes	(62)	(12)
Reclassification adjustment included in net income, net of income taxes	230	43
Other comprehensive income (loss)	$ 6,780	$ (4,856)