INVESTMENTS (Net Realized Gains (Losses) by Major Investment Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gross realized gains and losses [Abstract]
Total gross realized gains	$ 1,494	$ 2,073	$ 4,574	$ 5,161
Total gross realized losses	(368)	(947)	(2,514)	(1,418)
Net realized gains on investments	1,126	1,126	2,060	3,743
Debt securities [Member]
Gross realized gains and losses [Abstract]
Total gross realized gains	897	226	2,822	973
Total gross realized losses	(20)	(178)	(614)	(504)
Equity Securities [Member]
Gross realized gains and losses [Abstract]
Total gross realized gains	597	1,847	1,752	4,188
Total gross realized losses	$ (348)	$ (769)	$ (1,900)	$ (914)