INCOME TAXES Federal Statutory Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Provision for (benefit from) continuing operations at Federal statutory rate of 35%	$ (222)	$ (2,867)	$ 787
State income taxes, net of Federal income tax effect	13	(7)	11
Change in valuation allowance	(46,183)	(5,045)	447
Taxes related to foreign income	956	8,901	2,140
Effect of U.S. federal and state tax rate changes on deferred tax assets	46,189	0	(6,834)
Others	1,214	399	1,375
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	317	(639)	2,720
Provision for (benefit from) income taxes	$ 2,284	$ 742	$ 646