CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands		Total	Common Stock	Common Stock Class C Shares	Common Stock Class B Shares	Common Stock Class A Shares	Non- controlling Interest	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2015	[1]			58,967,502	555,556	30,295,457
Beginning balance at Dec. 31, 2015		$ (10,617,494)	$ 90				$ 171,763	$ 2,068,983	$ (12,441,885)	$ (414,528)	$ (1,917)
Increase Decrease In Stockholders Equity
Consolidated net income (loss)		(246,572)					55,484		(302,056)
Issuance of restricted stock (in shares)	[1]					1,206,991
Issuance of restricted stock		(1,565)	1				(1,366)	(1)			(199)
Amortization of share-based compensation		13,133					10,291	2,842
Purchases of additional noncontrolling interest		0					1,224	(1,224)
Disposal of noncontrolling interest		(36,846)					(36,846)
Dividend declared and paid to noncontrolling interests		(70,412)					(70,412)
Other		623					623	3			(3)
Other comprehensive income (loss)		57,272					(1,787)			59,059
Ending balance (in shares) at Dec. 31, 2016	[1]			58,967,502	555,556	31,502,448
Ending balance at Dec. 31, 2016		(10,901,861)	91				128,974	2,070,603	(12,743,941)	(355,469)	(2,119)
Increase Decrease In Stockholders Equity
Consolidated net income (loss)		(458,711)					(60,651)		(398,060)
Issuance of restricted stock (in shares)	[1]					1,123,720
Issuance of restricted stock		(1,823)	1				(1,468)	(1)			(355)
Amortization of share-based compensation		12,078					9,590	2,488
Purchases of additional noncontrolling interest		(1,227)					(703)	(524)
Disposal of noncontrolling interest		(2,439)					(2,439)
Dividend declared and paid to noncontrolling interests		(46,151)					(46,151)
Other		192					192
Other comprehensive income (loss)		55,598					13,847			41,751
Ending balance (in shares) at Dec. 31, 2017	[1]			58,967,502	555,556	32,626,168
Ending balance at Dec. 31, 2017		(11,344,344)	92				41,191	2,072,566	(13,142,001)	(313,718)	(2,474)
Increase Decrease In Stockholders Equity
Consolidated net income (loss)		(202,639)					(729)		(201,910)
Issuance of restricted stock (in shares)	[1]					(333,224)
Issuance of restricted stock		(797)					(713)				(84)
Amortization of share-based compensation		10,583					8,517	2,066
Dividend declared and paid to noncontrolling interests		(8,742)					(8,742)
Other		57					57		(1,435)	1,435
Other comprehensive income (loss)		(14,460)					(8,713)			(5,747)
Ending balance (in shares) at Dec. 31, 2018	[1]			58,967,502	555,556	32,292,944
Ending balance at Dec. 31, 2018		$ (11,560,342)	$ 92				$ 30,868	$ 2,074,632	$ (13,345,346)	$ (318,030)	$ (2,558)

[1] The Company's Class D Common Stock is not presented in the data above as there were no shares issued and outstanding in 2018, 2017 and 2016, respectively.