CONSOLIDATED STATEMENTS OF EQUITY - USD ($)	Total	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Preferred Stock [Member] Preferred Stock [Member]	Class A Common Stock 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	$ (106,532,000)	$ 1,910,244,000	$ (1,785,536,000)	$ (243,988,000)	$ 1,272,000	$ 0	$ 11,476,000		$ 0
BALANCE (in shares) at Dec. 31, 2016						1
BALANCE (in shares) at Dec. 31, 2016							143,449,913		0
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	4,412,000	4,412,000
Number of Warrants Exercised											1,148,469
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants										$ 92,000
Adjustments to Additional Paid in Capital, Warrant Issued	1,148,000	1,056,000
Preferred dividend paid in kind	(9,694,000)	9,694,000
Share issuance, stock-based compensation	0	(71,000)					$ (71,000)
Payments of withholding tax on net share settlement of stock-based compensation	(168,000)	168,000
Share issuance, stock-based compensation (in shares)							888,115
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	49,427,000		49,768,000		(341,000)
Gain / (loss) on derivative instruments (Note 14)	1,269,000			1,269,000
Currency translation adjustment	54,368,000			55,281,000	(913,000)
BALANCE at Dec. 31, 2017	(5,770,000)	1,905,779,000	(1,735,768,000)	(187,438,000)	18,000	$ 0	$ 11,639,000		$ 0
BALANCE (in shares) at Dec. 31, 2017						1
BALANCE (in shares) at Dec. 31, 2017							145,486,497		0
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	7,083,000	7,083,000
Number of Warrants Exercised											105,652,401
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants										8,452,000
Adjustments to Additional Paid in Capital, Warrant Issued	105,652,000	97,200,000
Preferred dividend paid in kind	(4,777,000)	4,777,000
Share issuance, stock-based compensation	0	(137,000)					$ (137,000)
Payments of withholding tax on net share settlement of stock-based compensation	(1,630,000)	1,630,000
Share issuance, stock-based compensation (in shares)							1,714,656
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	157,613,000		157,692,000		(79,000)
Gain / (loss) on derivative instruments (Note 14)	(5,800,000)			(5,800,000)
Currency translation adjustment	(23,050,000)			(23,412,000)	362,000
BALANCE at Dec. 31, 2018	229,321,000	2,003,518,000	(1,578,076,000)	(216,650,000)	301,000	$ 0	$ 20,228,000		$ 0
BALANCE (in shares) at Dec. 31, 2018						1
BALANCE (in shares) at Dec. 31, 2018							252,853,554		0
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	4,184,000	4,184,000
Number of Warrants Exercised
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants										$ 0
Adjustments to Additional Paid in Capital, Warrant Issued	0	0
Share issuance, stock-based compensation	0	(60,000)					$ (60,000)
Payments of withholding tax on net share settlement of stock-based compensation	(367,000)	367,000
Share issuance, stock-based compensation (in shares)							753,472
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	119,208,000		119,134,000		74,000
Gain / (loss) on derivative instruments (Note 14)	(3,979,000)			(3,979,000)
Currency translation adjustment	(6,149,000)			(6,287,000)	138,000
BALANCE at Dec. 31, 2019	$ 342,218,000	$ 2,007,275,000	$ (1,458,942,000)	$ (226,916,000)	$ 513,000	$ 0	$ 20,288,000		$ 0
BALANCE (in shares) at Dec. 31, 2019						1
BALANCE (in shares) at Dec. 31, 2019							253,607,026	0	0