SUMMARY OF INVESTMENTS (Unrealized Appreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ (21,271)	$ (37,621)	$ 51,814
Available-for-sale equity securities	34,179	(6,459)	15,781
Deferred policy acquisition costs	(4,410)	11,380	(16,789)
Income tax effect	(2,975)	11,446	(17,784)
Total change in net unrealized investment appreciation, net of tax	$ 5,523	$ (21,254)	$ 33,022