OTHER NON-CURRENT ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Assets, Noncurrent Disclosure [Abstract]
Deferred tax assets	$ 26,590	$ 20,054
Deferred contract costs	11,250	15,138
Other non-current assets	2,989	3,177
Total other non-current assets	$ 40,829	$ 38,369