SUMMARY OF INVESTMENTS (Unrealized Appreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ 45,305	$ 71,648	$ (57,475)
Deferred policy acquisition costs	0	0	7,274
Income tax effect	(9,514)	(15,046)	10,543
Cumulative change in accounting principles	0	0	(191,244)
Net unrealized investment depreciation of discontinued operations, sold	0	0	6,714
Total change in net unrealized investment appreciation (depreciation), net of tax	$ 35,791	$ 56,602	$ (224,188)