OTHER LIABILITIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Current:
Deferred revenue	$ 33,319		$ 9,906
Legal provisions	687		1,978
Operating lease liability	3,443		0
Other	1,004		1,795
Total other current liabilities	38,453		13,679
Non-current:
Deferred tax	22,344		22,545
Deferred tax	12,557		9,817
Operating lease liability	8,828		0
Related party Guarantee Fee payable (Note 4)	33,465		33,465
Other	4,332		1,466
Total other non-current liabilities	81,526		$ 67,293
Deferred Revenue, Revenue Recognized	$ 2,800	$ 2,500