OTHER NON-CURRENT ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Assets, Noncurrent Disclosure [Abstract]
Escrow deposit	$ 28,750	$ 28,750
Deferred contract costs	11,367	9,089
Other	2,656	2,589
Total other non-current assets	$ 42,773	$ 40,428	[1]

[1] As of January 1, 2018, the Company adopted Accounting Standards Update 2014-09, "Revenue from Contracts with Customers (Topic 606)" ("ASC 606"), using the full retrospective method. Accordingly, the Company has recast certain amounts in the prior period presented. See Note 1 below for additional discussion.