Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 2,272,442,000	$ 1,893,489,000	$ 2,263,934,000	$ 2,280,061,000	$ 2,569,808,000	$ 2,804,151,000	$ 2,263,934,000	$ 2,804,151,000
Non-cash stock compensation	2,397,000	3,202,000	1,576,000	3,672,000	4,621,000	1,984,000
Conversion of Class B shares to Class A shares	0		0			0
Purchase of treasury stock at cost	(112,994,000)	(105,786,000)	(145,806,000)			(29,203,000)
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding	304,000	360,000	(1,222,000)	(35,000)	(32,000)	25,614,000
Reclassification of redeemable noncontrolling interests and equity		(1,000)		(784,430,000)
Net income (loss)	360,137,000	(29,224,000)	(164,943,000)	(784,430,000)	(311,628,000)	98,316,000	165,970,000	(997,742,000)
Foreign currency translation adjustment, net of tax of $0	(22,627,000)	510,443,000	(59,761,000)	326,342,000	14,034,000	(330,116,000)	428,055,000	10,260,000
Minimum pension liability adjustment, net of tax of $0		27,000	(168,000)			(932,000)	(141,000)	(932,000)
Changes in noncontrolling interests	90,000
Foreign currency translation adjustment, tax	0	0	0	0		0	0	0
Accretion of redemption value of redeemable noncontrolling interests and equity	0			6,000			(88,000)	163,000
Reclassification of redeemable noncontrolling interests and equity				1,574,000	(414,000)
Balance, end of period	1,227,959,000	2,272,442,000	1,893,489,000	1,824,580,000	2,280,061,000	2,569,808,000	1,227,959,000	1,824,580,000
Pension adjustment, tax		0	0			0	0	0
Previously Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			2,263,934,000				2,263,934,000
Revision of Prior Period, Accounting Standards Update, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period		(101,000)
Balance, end of period			(101,000)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding					1,000
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	3,763,855,000	3,760,362,000	3,760,029,000	3,756,975,000	3,752,186,000	3,724,636,000	3,760,029,000	3,724,636,000
Non-cash stock compensation	2,397,000	3,202,000	1,576,000	3,672,000	4,621,000	1,984,000
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding	304,000	359,000	(1,223,000)	(35,000)	(33,000)	25,610,000
Changes in noncontrolling interests	90,000
Balance, end of period	2,494,856,000	3,763,855,000	3,760,362,000	3,758,008,000	3,756,975,000	3,752,186,000	2,494,856,000	3,758,008,000
(Accumulated deficit) retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(370,851,000)	(341,851,000)		228,301,000	536,124,000	436,509,000		436,509,000
Net income (loss)	360,406,000	(29,000,000)	(164,928,000)	(784,442,000)	(307,823,000)	99,615,000
Balance, end of period	(10,445,000)	(370,851,000)	(341,851,000)	(556,141,000)	228,301,000	536,124,000	(10,445,000)	(556,141,000)
(Accumulated deficit) retained earnings | Previously Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period			(176,822,000)				(176,822,000)
(Accumulated deficit) retained earnings | Revision of Prior Period, Accounting Standards Update, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period		(101,000)
Balance, end of period			(101,000)
Accumulated other comprehensive (loss) income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(491,425,000)	(1,001,897,000)	(941,986,000)	(1,391,686,000)	(1,405,788,000)	(1,073,981,000)	(941,986,000)	(1,073,981,000)
Foreign currency translation adjustment, net of tax of $0	(22,648,000)	510,445,000	(59,743,000)	326,416,000	14,102,000	(330,875,000)
Minimum pension liability adjustment, net of tax of $0		27,000	(168,000)			(932,000)
Balance, end of period	(514,073,000)	(491,425,000)	(1,001,897,000)	(1,065,270,000)	(1,391,686,000)	(1,405,788,000)	(514,073,000)	(1,065,270,000)
Treasury stock at cost
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(616,908,000)	(511,122,000)	(365,316,000)	(300,309,000)	(300,309,000)	(271,106,000)	$ (365,316,000)	(271,106,000)
Purchase of treasury stock at cost (in shares)							(25,059,000)
Purchase of treasury stock at cost	(112,994,000)	(105,786,000)	(145,806,000)			(29,203,000)
Balance, end of period	(729,902,000)	(616,908,000)	(511,122,000)	(300,309,000)	(300,309,000)	(300,309,000)	$ (729,902,000)	(300,309,000)
Non-controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(13,142,000)	(12,915,000)	(12,882,000)	(14,130,000)	(13,314,000)	(12,812,000)	(12,882,000)	(12,812,000)
Reclassification of redeemable noncontrolling interests and equity		(1,000)		12,000
Net income (loss)	(269,000)	(224,000)	(15,000)		(3,805,000)	(1,299,000)
Foreign currency translation adjustment, net of tax of $0	21,000	(2,000)	(18,000)	(74,000)	(68,000)	759,000
Change in noncontrolling interests					3,471,000
Reclassification of redeemable noncontrolling interests and equity				1,574,000	(414,000)
Balance, end of period	$ (13,390,000)	$ (13,142,000)	$ (12,915,000)	$ (12,618,000)	$ (14,130,000)	$ (13,314,000)	$ (13,390,000)	$ (12,618,000)
Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			115,119,000				115,119,000
Balance of shares outstanding, end of period (in shares)	114,983,000						114,983,000
Class A Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	114,786,000	122,213,000	115,119,000	119,207,000	119,075,000	119,575,000	115,119,000	119,575,000
Balance, beginning of period	$ 619,000	$ 618,000	$ 548,000	$ 547,000	$ 546,000	$ 542,000	$ 548,000	$ 542,000
Conversion of Class B shares to Class A shares (in shares)	(7,188,000)		(17,248,000)			(18,000)
Conversion of Class B shares to Class A shares	$ (29,000)		$ (69,000)
Purchase of treasury stock at cost (in shares)	(7,110,000)	(7,548,000)	(10,401,000)			(1,619,000)
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding (in shares)	119,000	119,000	247,000	63,000	132,000	1,101,000
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding		$ 1,000	$ 1,000			$ 4,000
Conversion of Class B shares to Class A shares (in shares)		(2,000)
Balance of shares outstanding, end of period (in shares)	114,983,000	114,786,000	122,213,000	119,270,000	119,207,000	119,075,000	114,983,000	119,270,000
Balance, end of period	$ 648,000	$ 619,000	$ 618,000	$ 547,000	$ 547,000	$ 546,000	$ 648,000	$ 547,000
Class B Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			90,792,000				90,792,000
Balance of shares outstanding, end of period (in shares)	66,354,000						66,354,000
Class B Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	73,542,000	73,544,000	90,792,000	90,813,000	90,813,000	90,831,000	90,792,000	90,831,000
Balance, beginning of period	$ 294,000	$ 294,000	$ 363,000	$ 363,000	$ 363,000	$ 363,000	$ 363,000	$ 363,000
Conversion of Class B shares to Class A shares (in shares)	(7,188,000)		(17,248,000)			(18,000)
Conversion of Class B shares to Class A shares	$ 29,000		$ 69,000
Conversion of Class B shares to Class A shares (in shares)		(2,000)
Balance of shares outstanding, end of period (in shares)	66,354,000	73,542,000	73,544,000	90,813,000	90,813,000	90,813,000	66,354,000	90,813,000
Balance, end of period	$ 265,000	$ 294,000	$ 294,000	$ 363,000	$ 363,000	$ 363,000	$ 265,000	$ 363,000
Accretion of redeemable noncontrolling interests and equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interests and equity						(44,000)
Accretion of redemption value of redeemable noncontrolling interests and equity				6,000	201,000
Accretion of redeemable noncontrolling interests and equity | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interests and equity						(44,000)
Accretion of redemption value of redeemable noncontrolling interests and equity				6,000	201,000
Redeemable noncontrolling interests and equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interests and equity			(20,000)
Reclassification of redeemable noncontrolling interests and equity						38,000
Change in noncontrolling interests	(1,271,790,000)	(68,000)		(2,610,000)	$ 3,471,000
Redeemable noncontrolling interests and equity | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interests and equity			$ (20,000)
Change in noncontrolling interests	$ (1,271,790,000)	$ (68,000)		$ (2,610,000)
Redeemable noncontrolling interests and equity | Non-controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of redeemable noncontrolling interests and equity						$ 38,000