SUMMARY OF INVESTMENTS (Unrealized Appreciation) (Details) - Continuing and Discontinuing Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ 71,648	$ (57,475)	$ 25,573
Available-for-sale equity securities	0	0	40,168
Deferred policy acquisition costs	0	7,274	119
Income tax effect	(15,046)	10,543	(21,545)
Cumulative change in accounting principles	0	(191,244)	0
Accumulated effect of change in enacted tax rate	0	0	36,658
Net unrealized investment depreciation of discontinued operations, sold	0	6,714	0
Total change in net unrealized investment appreciation (depreciation), net of tax	$ 56,602	$ (224,188)	$ 80,973