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Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ 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 Convertible Redeemable Preferred Stock | Additional paid-in capital Series A Redeemable Convertible Preferred Stock - Beneficial Conversion Feature | (Accumulated deficit) retained earnings | Accumulated other comprehensive (loss) income | Non-controlling interests
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Balance of shares outstanding, beginning of period (in shares) at Dec. 31, 2014 |  |  |  |  |  |  | 132,973 | 0 | 0 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2014 | $ 1,056,548 |  |  |  |  |  | $ 532 | $ 0 | $ 0 | $ 2,688,877 |  |  |  | $ (1,093,300) | $ (579,041) | $ 39,480
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash stock compensation (in shares) |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  |
Non-cash stock compensation | 34,120 |  |  |  |  |  |  |  |  | 34,120 |  |  |  |  |  |
Cash distributions to stockholders | $ (18,975) |  |  |  |  |  |  |  |  | (18,975) |  |  |  |  |  |
Exercise of stock options (in shares) | 460 |  |  |  |  |  | 111 |  |  |  |  |  |  |  |  |
Exercise of stock options | $ 2,040 |  |  |  |  |  |  |  |  | 2,040 |  |  |  |  |  |
Vesting of restricted stock and exercise of stock options, net of shares withheld to satisfy tax withholding (in shares) |  |  |  |  |  |  | 163 |  |  |  |  |  |  |  |  |
Vesting of restricted stock and restricted stock units, net of shares withheld to satisfy tax withholding | (3,868) |  |  |  |  |  | $ 1 |  |  | (3,869) |  |  |  |  |  |
Dividends to noncontrolling interests | (1,242) |  |  |  |  |  |  |  |  | (1,147) |  |  |  |  |  | (95)
Capital contributions from noncontrolling interest holders | 1,382 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,382
Changes in noncontrolling interests | (3,365) |  |  |  |  |  |  |  |  | (1,554) |  |  |  |  | 442 | (2,253)
Accretion of redeemable noncontrolling interests and equity | (13,041) |  |  |  |  |  |  |  |  | (13,041) |  |  |  |  |  |
Reclassification of redeemable noncontrolling interests and equity | (4,613) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,613)
Net income (loss) | (315,845) |  |  |  |  |  |  |  |  |  |  |  |  | (316,248) |  | 403
Foreign currency translation adjustment, net of tax of $0 for all years | (386,310) |  |  |  |  |  |  |  |  |  |  |  |  |  | (382,673) | (3,637)
Unrealized gain on derivative instruments, net of tax of $0 for all years | 5,629 |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,629 |
Minimum pension liability adjustment, net of tax of $105, $1,800 and $982, respectively | 2,966 |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,966 |
Balance of shares outstanding, end of period (in shares) at Dec. 31, 2015 |  |  |  |  |  |  | 133,255 | 0 | 0 |  |  |  |  |  |  |
Balance, end of period at Dec. 31, 2015 | 355,426 |  |  |  |  |  | $ 533 | $ 0 | $ 0 | 2,686,451 |  |  |  | (1,409,548) | (952,677) | 30,667
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash stock compensation | $ 38,071 |  |  |  |  |  |  |  |  | 38,071 |  |  |  |  |  |
Exercise of stock options (in shares) | 245 |  |  |  |  |  | 12 |  |  |  |  |  |  |  |  |
Exercise of stock options | $ 253 |  |  |  |  |  |  |  |  | 253 |  |  |  |  |  |
Vesting of restricted stock and exercise of stock options, net of shares withheld to satisfy tax withholding (in shares) |  |  |  |  |  |  | 109 |  |  |  |  |  |  |  |  |
Vesting of restricted stock and restricted stock units, net of shares withheld to satisfy tax withholding | (1,725) |  |  |  |  |  | $ 1 |  |  | (1,726) |  |  |  |  |  |
Dividends to noncontrolling interests | (1,164) |  |  |  |  |  |  |  |  | (1,164) |  |  |  |  |  |
Capital contributions from noncontrolling interest holders | 5,572 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,572
Changes in noncontrolling interests | 3,104 |  |  |  |  |  |  |  |  | 1,003 |  |  |  |  |  | 2,101
Accretion of redeemable noncontrolling interests and equity | 263 |  |  |  | $ (1,719) |  |  |  |  | 263 |  | $ (1,719) |  |  |  |
Reclassification of redeemable noncontrolling interests and equity | (613) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (613)
Net income (loss) | 366,186 |  |  |  |  |  |  |  |  |  |  |  |  | 371,847 |  | (5,661)
Foreign currency translation adjustment, net of tax of $0 for all years | (115,685) |  |  |  |  |  |  |  |  |  |  |  |  |  | (115,801) | 116
Unrealized gain on derivative instruments, net of tax of $0 for all years | 8,032 |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,032 |
Minimum pension liability adjustment, net of tax of $105, $1,800 and $982, respectively | $ 8,391 |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,391 |
Balance of shares outstanding, end of period (in shares) at Dec. 31, 2016 | 133,376 | 0 | 0 |  |  |  | 133,376 | 0 | 0 |  |  |  |  |  |  |
Balance, end 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 |  |  |  |  |  |
Exercise of stock options (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification of Common stock into Class B common stock on January 31, 2017 (in shares) |  |  |  |  |  |  | (133,376) |  | 133,376 |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |
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 | (1,229) |  |  |  |  |  |  |
Conversion of Class B shares to Class A shares | 0 |  |  |  |  |  |  | $ 5 | $ (5) |  |  |  |  |  |  |
Note exchange transaction (in shares) |  |  |  |  |  |  |  | 18,683 |  |  |  |  |  |  |  |
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 | 296 |  |  |  |  |  |  |
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 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 |  |  |  | $ (5,183) | $ (292,450) | $ 265,368 |  |  |  |  | $ (5,183) | $ (292,450) | $ 265,368 |  |  |
Reclassification of redeemable noncontrolling interests and equity | (917) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (917)
Net income (loss) | 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 gain on derivative instruments, net of tax of $0 for all years | 9,875 |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,875 |
Minimum pension liability adjustment, net of tax of $105, $1,800 and $982, respectively | (377) |  |  |  |  |  |  |  |  |  |  |  |  |  | (377) |
Balance of shares outstanding, end of period (in shares) at Dec. 31, 2017 |  | 55,052 | 132,443 |  |  |  | 0 | 55,052 | 132,443 |  |  |  |  |  |  |
Balance, end of period at Dec. 31, 2017 | $ 1,587,282 |  |  |  |  |  | $ 0 | $ 220 | $ 530 | $ 3,446,206 |  |  |  | $ (946,236) | $ (925,556) | $ 12,118

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