Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			$ 1,587,282,000
Adoption of accounting standards						$ 4,330,000
Balance, adjusted						1,591,612,000
Non-cash stock compensation			10,492,000
Vesting of restricted stock, net of shares withheld to satisfy tax withholding			(1,744,000)
Distributions to noncontrolling interest holders			(892,000)
Change in noncontrolling interests			(23,773,000)
Reclassification of redeemable noncontrolling interests and equity			(309,000)
Net income	$ (96,684,000)	$ (103,490,000)	298,814,000	$ (106,745,000)
Foreign currency translation adjustment, net of tax of $0	(52,750,000)	64,742,000	(166,052,000)	196,593,000
Unrealized gain on derivatives, net of tax of $0	(560,000)	525,000	11,776,000	6,625,000
Minimum pension liability adjustment, net of tax of $0			376,000
Balance, end of period	1,971,667,000		1,971,667,000
Foreign currency translation adjustment, tax	0	0	0	0
Unrealized gain on derivative instruments, tax	0	0	0	0
Pension adjustment, tax			0	0
Retained earnings	(643,407,000)		(643,407,000)			(946,236,000)
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			3,446,206,000
Balance, adjusted						3,446,206,000
Non-cash stock compensation			10,492,000
Vesting of restricted stock, net of shares withheld to satisfy tax withholding			(1,746,000)
Change in noncontrolling interests			(468,000)
Balance, end of period	3,705,707,000		3,705,707,000
(Accumulated deficit) retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			(946,236,000)
Adoption of accounting standards						4,330,000
Balance, adjusted						(941,906,000)
Net income			298,499,000
Balance, end of period	(643,407,000)		(643,407,000)
Accumulated other comprehensive (loss) income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			(925,556,000)
Balance, adjusted						(925,556,000)
Foreign currency translation adjustment, net of tax of $0			(166,456,000)
Unrealized gain on derivatives, net of tax of $0			11,776,000
Minimum pension liability adjustment, net of tax of $0			376,000
Balance, end of period	(1,079,860,000)		(1,079,860,000)
Non-controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			12,118,000
Balance, adjusted						12,118,000
Distributions to noncontrolling interest holders			(892,000)
Change in noncontrolling interests			(23,305,000)
Reclassification of redeemable noncontrolling interests and equity			(309,000)
Net income			315,000
Foreign currency translation adjustment, net of tax of $0			404,000
Balance, end of period	$ (11,669,000)		$ (11,669,000)
Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			55,052
Balance of shares outstanding, end of period (in shares)	91,654		91,654
Class A Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			55,052
Balance, beginning of period			$ 220,000
Balance, adjusted						220,000
Conversion of Class B shares to Class A shares (in shares)			115
Vesting of restricted stock, net of shares withheld to satisfy tax withholding (in shares)			344
Vesting of restricted stock, net of shares withheld to satisfy tax withholding			$ 2,000
Balance of shares outstanding, end of period (in shares)	91,654		91,654
Balance, end of period	$ 366,000		$ 366,000
Class B Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			132,443
Balance of shares outstanding, end of period (in shares)	132,387		132,387
Class B Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			132,443
Balance, beginning of period			$ 530,000
Balance, adjusted						$ 530,000
Conversion of Class B shares to Class A shares (in shares)			(115)
Vesting of restricted stock, net of shares withheld to satisfy tax withholding (in shares)			59
Balance of shares outstanding, end of period (in shares)	132,387		132,387
Balance, end of period	$ 530,000		$ 530,000
Redeemable noncontrolling interests and equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity			1,130,000
Redeemable noncontrolling interests and equity | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity			1,130,000
Series A Convertible Redeemable Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity	0	$ (83,955,000)	(61,974,000)	$ (185,149,000)
Gain upon conversion of Series A Preferred Stock			74,110,000
Reclassification of Series A Preferred Stock upon conversion			$ 238,101,000
Series A Convertible Redeemable Preferred Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of Series A Preferred Stock upon conversion (in shares)			36,143
Reclassification of Series A Preferred Stock upon conversion			$ 144,000
Series A Convertible Redeemable Preferred Stock | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity			(61,974,000)
Gain upon conversion of Series A Preferred Stock			74,110,000
Reclassification of Series A Preferred Stock upon conversion			237,957,000
ASU 2014-09 | Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,071,000
Retained earnings	$ 7,488,000		$ 7,488,000		$ 1,400,000
ASU 2016-16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings					$ 2,900,000