OTHER NON-CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Income tax liabilities	$ 5,825	$ 5,955
Deferred revenue	5,529	2,101
Other non-current liabilities	4,061	4,226
Total	$ 15,415	$ 12,282