INCOME TAXES (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Amount of unrecognized tax benefits as of the beginning of the year	$ 758	$ 2,005
Decreases as a result of tax positions taken in a prior period	(78)	(1,527)
Increases as a result of tax positions taken in a prior period	53	60
Increases as a result of tax positions taken in the current period	8,159	220
Amount of unrecognized tax benefits as of the end of the year	8,892	758
Unrecognized tax benefits that would affect the effective tax rate	11,500	600
Unrecognized tax benefits, income tax penalties and interest accrued	$ 2,600	$ 100