Summary of Investments (Unrealized Appreciation) (Details) - Continuing and Discontinuing Operations - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Gain (Loss) on Securities [Line Items]
Available-for-sale fixed maturities	$ 77,103	$ (80,023)
Deferred policy acquisition costs	0	7,274
Income tax effect	(16,192)	15,279
Net unrealized investment depreciation of discontinued operations, sold	0	6,714
Cumulative change in accounting principles	0	(191,244)
Total change in net unrealized investment appreciation, net of tax	$ 60,911	$ (242,000)