INCOME TAXES (Components of Income Tax (Benefit) Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Current income tax expense	$ 1,743	$ 3,887	$ 648
Deferred income tax (benefit) expense	(12,526)	19,802	0
Total income tax (benefit) expense	$ (10,783)	$ 23,689	$ 648