Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Puttable Arrangements - Common and Preferred Stock	Series A Convertible Redeemable Preferred Stock	Series A Redeemable Convertible Preferred Stock - Beneficial Conversion Feature	Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional paid-in capital	Additional paid-in capital Puttable Arrangements - Common and Preferred Stock	Additional paid-in capital Series A Redeemable Convertible Preferred Stock - Beneficial Conversion Feature	(Accumulated deficit) retained earnings	Accumulated other comprehensive (loss) income	Treasury stock at cost	Non-controlling interests	Previously Reported	Previously Reported Common Stock Class A Common Stock	Previously Reported Common Stock Class B Common Stock	Previously Reported Additional paid-in capital	Previously Reported (Accumulated deficit) retained earnings	Previously Reported Accumulated other comprehensive (loss) income	Previously Reported Treasury stock at cost	Previously Reported Non-controlling interests	Restatement Adjustment	Restatement Adjustment (Accumulated deficit) retained earnings
Balance of beginning of period (in shares) at Dec. 31, 2016							133,376,000	0	0
Balance, beginning of period at Dec. 31, 2016	$ 664,392						$ 534	$ 0	$ 0	$ 2,721,432			$ (1,037,701)	$ (1,052,055)		$ 32,182
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Non-cash stock compensation	64,788									64,788
Reclassification of Common stock into Class B common stock on January 31, 2017 (in shares)							(133,376,000)		133,376,000
Reclassification of Common stock into Class B common stock on January 31, 2017	0						$ (534)		$ 534
Issuance of Class A common stock in initial public offering (in shares)								35,000,000
Issuance of Class A common stock in initial public offering	456,359							$ 140		456,219
Conversion of Class B shares to Class A shares (in shares)								1,229,000	(1,229,000)
Conversion of Class B shares to Class A shares	$ 0							$ 5	$ (5)
Exercise of stock options (in shares)	0
Note exchange transaction (in shares)								18,683,000
Note exchange transaction	$ 245,747							$ 75		245,672
Vesting of restricted stock and exercise of stock options, net of shares withheld to satisfy tax withholding (in shares)								140,000	296,000
Vesting of restricted stock and restricted stock units, net of shares withheld to satisfy tax withholding	(2,151)								$ 1	(2,152)
Reclassification to equity upon expiration of put right on share-based awards	5,500									5,500
Dividends to noncontrolling interests	(1,419)									(1,419)
Distributions from/to noncontrolling interest holders	167															167
Changes in noncontrolling interests	(36,617)									(11,569)				(1,164)		(23,884)
Accretion of redeemable noncontrolling interests and equity	317			$ (5,183)							$ (5,183)
Accretion of Series A Preferred Stock	0				$ (292,450)
Reclassification of Series A Preferred Stock upon conversion						$ 265,368						$ 265,368
Reclassification of redeemable noncontrolling interests and equity	(917)															(917)
Net income	93,764												91,465			2,299
Foreign currency translation adjustment, net of tax of $0 for all years	120,436													118,165		2,271
Unrealized (loss) gain on derivative instruments, net of tax of $0 for all years	9,875													9,875
Minimum pension liability adjustment, net of tax of $0, $144 and $105, respectively	(377)													(377)
Balance of end of period (in shares) at Dec. 31, 2017							0	55,052,000	132,443,000
Balance, end of period at Dec. 31, 2017	1,632,532						$ 0	$ 220	$ 530	3,446,206			(900,986)	(925,556)	$ 0	12,118	$ 1,587,282	$ 220	$ 530	$ 3,446,206	$ (946,236)	$ (925,556)	$ 0	$ 12,118
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standards																									$ 45,250	$ 45,250
Non-cash stock compensation	10,791									10,791
Conversion of Class B shares to Class A shares (in shares)								15,638,000	(15,638,000)
Conversion of Class B shares to Class A shares	$ 0							$ 63	$ (63)
Exercise of stock options (in shares)	0
Vesting of restricted stock and exercise of stock options, net of shares withheld to satisfy tax withholding (in shares)								617,000	60,000
Vesting of restricted stock and restricted stock units, net of shares withheld to satisfy tax withholding	$ (2,528)							$ 3	$ 0	(2,531)
Distributions from/to noncontrolling interest holders	334															334
Changes in noncontrolling interests	(23,776)									(471)						(23,305)
Accretion of redeemable noncontrolling interests and equity	(292)									(292)
Accretion of Series A Preferred Stock	(61,974)					$ 265,368
Gain upon conversion of Series A Preferred Stock	74,110									74,110
Reclassification of Series A Preferred Stock upon conversion	238,101							$ 144		237,957
Reclassification of redeemable noncontrolling interests and equity	(635)															(635)
Net income	370,930												370,067			863
Foreign currency translation adjustment, net of tax of $0 for all years	(200,006)													(200,498)		492
Unrealized (loss) gain on derivative instruments, net of tax of $0 for all years	13,709													13,709
Minimum pension liability adjustment, net of tax of $0, $144 and $105, respectively	(350)													(350)
Balance of end of period (in shares) at Dec. 31, 2018		107,450,000	116,865,000					107,450,000	116,865,000
Balance, end of period at Dec. 31, 2018	2,050,946							$ 430	$ 467	3,703,796			(530,919)	(1,112,695)	0	(10,133)	$ 2,079,890	$ 430	$ 467	$ 3,703,796	$ (501,975)	$ (1,112,695)	$ 0	$ (10,133)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of accounting standards																									$ 28,944
Non-cash stock compensation	12,994									12,994
Conversion of Class B shares to Class A shares (in shares)								26,034,000	(26,034,000)
Conversion of Class B shares to Class A shares	0							$ 104	$ (104)
Purchase of treasury stock at cost (in shares)								(16,008,000)
Purchase of treasury stock at cost	$ (271,106)														(271,106)
Exercise of stock options (in shares)	1,569,000							2,099,000
Exercise of stock options	$ 11,762							$ 8		11,754
Distributions from/to noncontrolling interest holders	1,356															1,356
Changes in noncontrolling interests	(3,700)									(3,700)
Accretion of redeemable noncontrolling interests and equity	(208)									(208)
Accretion of Series A Preferred Stock	0
Reclassification of redeemable noncontrolling interests and equity	(370)															(370)
Net income	937,664												938,484			(820)
Foreign currency translation adjustment, net of tax of $0 for all years	42,935													43,068		(133)
Unrealized (loss) gain on derivative instruments, net of tax of $0 for all years	(7,950)													(7,950)
Minimum pension liability adjustment, net of tax of $0, $144 and $105, respectively	3,596													3,596
Balance of end of period (in shares) at Dec. 31, 2019		119,575,000	90,831,000					119,575,000	90,831,000
Balance, end of period at Dec. 31, 2019	$ 2,804,151							$ 542	$ 363	$ 3,724,636			$ 436,509	$ (1,073,981)	$ (271,106)	$ (12,812)