Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 1,587,282
Adoption of accounting standards				$ 5,074
Balance, adjusted				1,592,356
Non-cash stock compensation	(3,756)
Vesting of restricted stock, net of shares withheld to satisfy tax withholding	(803)
Distributions from noncontrolling interest holders	581
Change in noncontrolling interests	(21,043)
Reclassification of redeemable noncontrolling interests and equity	38
Net income	171,545	$ (120,353)
Foreign currency translation adjustment, net of tax of $0	83,369	103,396
Unrealized gain on derivatives, net of tax of $0	2,210	2,592
Balance, end of period	1,767,473
Foreign currency translation adjustment, tax	0	0
Unrealized gain on derivative instruments, tax	0	0
Pension adjustment, tax	0	$ 0
Retained earnings	(772,283)			(946,236)
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	3,446,206
Balance, adjusted				3,446,206
Non-cash stock compensation	(3,756)
Vesting of restricted stock, net of shares withheld to satisfy tax withholding	(804)
Change in noncontrolling interests	(468)
Balance, end of period	3,383,778
(Accumulated deficit) retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(946,236)
Adoption of accounting standards				5,074
Balance, adjusted				(941,162)
Net income	168,879
Balance, end of period	(772,283)
Accumulated other comprehensive (loss) income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(925,556)
Balance, adjusted				(925,556)
Change in noncontrolling interests	0
Foreign currency translation adjustment, net of tax of $0	83,648
Unrealized gain on derivatives, net of tax of $0	2,210
Minimum pension liability adjustment, net of tax of $0	376
Balance, end of period	(839,322)
Non-controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	12,118
Balance, adjusted				12,118
Distributions from noncontrolling interest holders	581
Change in noncontrolling interests	(20,575)
Reclassification of redeemable noncontrolling interests and equity	38
Net income	2,666
Foreign currency translation adjustment, net of tax of $0	(279)
Minimum pension liability adjustment, net of tax of $0	376
Balance, end of period	$ (5,451)
Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	55,052,000
Balance of shares outstanding, end of period (in shares)	55,256,000
Class A Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	55,052,000
Balance, beginning of period	$ 220
Balance, adjusted				220
Conversion of Class B shares to Class A shares (in shares)	59,000
Vesting of restricted stock, net of shares withheld to satisfy tax withholding (in shares)	145,000
Vesting of restricted stock, net of shares withheld to satisfy tax withholding	$ 1
Balance of shares outstanding, end of period (in shares)	55,256,000
Balance, end of period	$ 221
Class B Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	132,443,000
Balance of shares outstanding, end of period (in shares)	132,443,000
Class B Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	132,443,000
Balance, beginning of period	$ 530
Balance, adjusted				$ 530
Conversion of Class B shares to Class A shares (in shares)	(59,000)
Vesting of restricted stock, net of shares withheld to satisfy tax withholding (in shares)	59,000
Balance of shares outstanding, end of period (in shares)	132,443,000
Balance, end of period	$ 530
Redeemable noncontrolling interests and equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity	(76)
Redeemable noncontrolling interests and equity | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity	(76)
Series A Convertible Redeemable Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity	(57,324)
Series A Convertible Redeemable Preferred Stock | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interest and equity	(57,324)
ASU 2014-09 | Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,718
Retained earnings	$ 11,136		$ 1,400
ASU 2016-16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings			$ 3,700