OTHER NON-CURRENT ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Assets, Noncurrent Disclosure [Abstract]
Deferred tax assets	$ 27,487	$ 20,054
Deferred contract costs	11,648	15,138
Other non-current assets	2,910	3,177
Total other non-current assets	$ 42,045	$ 38,369