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Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) | 3 Months Ended | 9 Months Ended
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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 |  |

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