OTHER LIABILITIES (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017	Dec. 31, 2017
Current:
Deferred revenue	$ 23,219			$ 23,219			$ 5,675
Legal provisions	2,016			2,016			2,907
Other	618			618			698
Total other current liabilities	25,853			25,853			9,280
Non-current:
Deferred tax	19,222			19,222			20,569
Related party commitment fee payable (1)	11,218	[1]		11,218	[1]		10,765
Related party Guarantee Fee payable (Note 5)	62,817			62,817			58,855
Other	10,840			10,840			5,065
Total other non-current liabilities	104,097			104,097			$ 95,254
Deferred Revenue, Revenue Recognized	$ 1,600		$ 1,200	$ 4,100		$ 3,700
2015 Convertible Notes [Member]
Non-current:
Accounts Payable, Interest-bearing, Interest Rate	8.50%			8.50%
2015 Convertible Notes [Member]
Non-current:
Debt Instrument, Interest Rate, Stated Percentage							5.00%

[1] (1) Represents the commitment fee ("Commitment Fee") payable to Warner Media, including accrued interest, in respect of its obligation under a commitment letter dated November 14, 2014 between Warner Media and us whereby Warner Media agreed to provide or assist with arranging a loan facility to repay our 5.0% senior convertible notes at maturity in November 2015. The Commitment Fee is payable by November 1, 2021 or earlier if the repayment of the 2021 Euro Loan is accelerated. The Commitment Fee bears interest at 8.5% per annum and such interest is payable in arrears on each May 1 and November 1, and may be paid in cash or in kind, at our election.