INTANGIBLE ASSETS (Intangible Assets Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning balance	$ 45,617	$ 50,217	$ 54,817
Amortization	(4,600)	(4,600)	(4,600)
Ending balance	$ 41,017	$ 45,617	$ 50,217