INVESTMENTS (Summary of Net Investment Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net investment income [Abstract]
Interest income	$ 7,920	$ 6,638	$ 4,832
Dividends income	1,143	588	553
Net investment income	$ 9,063	$ 7,226	$ 5,385