INCOME TAXES (Schedule of Uncertain Tax Positions) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Balance at January 1,	$ 579	$ 249
Increases related to current year tax positions	8,499	330	249
Decreases related to prior year tax positions	(579)
Balance at December 31,	$ 8,499	$ 579	$ 249