CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	Preferred Class A [Member] Series A Convertible Preferred Stock [Member]	Common Class A [Member] Common Stock [Member]	Common Class B [Member]	Common Class B [Member] Common Stock [Member]	Warrant [Member] Common Stock [Member]	2018 Warrants [Member]
BALANCE at Dec. 31, 2016	$ (106,532)	$ 1,910,244	$ (1,785,536)	$ (243,988)	$ 1,272	$ 0	$ 11,476		$ 0
BALANCE (in shares) at Dec. 31, 2016						1
BALANCE (in shares) at Dec. 31, 2016							143,449,913	0	0
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	1,675	1,675
Shares issuance, stock-based compensation (in shares)							812,153
Shares issuance, stock-based compensation	0	(65)					$ 65
Payments of withholding tax on net share settlement of share-based compensation	(168)	(168)
Number of Warrants Exercised											527,268
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants										$ 42
Adjustments to Additional Paid in Capital, Warrant Issued	527	485
Preferred dividend paid-in-kind	(4,762)	(4,762)
Net loss	16,524		16,870		(346)
(Loss) / gain on derivative instruments (Note 11)	(1,218)			(1,218)
Currency translation adjustment	32,976			33,521	(545)
Currency translation adjustment	32,976
BALANCE at Jun. 30, 2017	$ (58,542)	$ 1,907,409	$ (1,768,666)	$ (209,249)	$ 381	$ 0	$ 11,583		$ 0
BALANCE (in shares) at Jun. 30, 2017						1
BALANCE (in shares) at Jun. 30, 2017							144,789,334	0	0