INVESTMENTS (Summary of Net Investment Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net investment income [Abstract]
Interest income	$ 2,492	$ 1,963	$ 7,073	$ 5,801
Dividends income	111	201	408	597
Net investment income	$ 2,603	$ 2,164	$ 7,481	$ 6,398