OTHER ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Security deposits	$ 5,304	$ 5,508
Maintenance agreements, non-current portion	362	853
Restricted cash	3,837	4,127
Other	692	767
Total	$ 10,195	$ 11,255