SUMMARY OF INVESTMENTS (Unrealized Appreciation) (Details) - Continuing and Discontinuing Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ 25,573	$ (21,271)	$ (37,621)
Available-for-sale equity securities	40,168	34,179	(6,459)
Deferred policy acquisition costs	119	(4,410)	11,380
Income tax effect	(21,545)	(2,975)	11,446
Accumulated effect of change in enacted tax rate	36,658	0	0
Total change in net unrealized investment appreciation, net of tax	$ 80,973	$ 5,523	$ (21,254)