CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Common Stock	Non-controlling Interest	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock	Class A Common Shares Issued Common Stock	Class B Common Shares Issued Common Stock
Beginning balance (in shares) at Dec. 31, 2018								51,559,633	315,000,000
Beginning balance at Dec. 31, 2018	$ (2,101,652)	$ 3,666	$ 160,362	$ 3,086,307	$ (5,000,920)	$ (344,489)	$ (6,578)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(169,554)		(5,387)		(164,167)
Exercise of stock options and release of stock awards (in shares)								150,127
Exercise of stock options and release of stock awards	64	1		72			(9)
Share-based compensation	1,834		152	1,682
Payments to noncontrolling interests	(3,684)		(3,684)
Other comprehensive income (loss)	2,549		3,584			(1,035)
Ending balance (in shares) at Mar. 31, 2019								51,709,760	315,000,000
Ending balance at Mar. 31, 2019	(2,255,830)	$ 3,667	155,027	3,088,061	(5,150,474)	(345,524)	(6,587)
Beginning balance (in shares) at Dec. 31, 2019		466,744,939
Beginning balance at Dec. 31, 2019	(2,054,706)	$ 4,667	152,814	3,489,593	(5,349,611)	(349,552)	(2,617)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(289,223)		(11,732)		(277,491)
Exercise of stock options and release of stock awards (in shares)		169,203
Exercise of stock options and release of stock awards	326	$ 2		38			286
Share-based compensation	3,777		42	3,735
Payments to noncontrolling interests	(118)		(118)
Other comprehensive income (loss)	(16,421)		(2,251)			(14,170)
Other	3			3
Ending balance (in shares) at Mar. 31, 2020		466,914,142
Ending balance at Mar. 31, 2020	$ (2,363,543)	$ 4,669	$ 138,755	$ 3,493,369	$ (5,634,283)	$ (363,722)	$ (2,331)