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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Common stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit | Treasury Stock | Noncontrolling Interest | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 1,019 | $ 1,258,151 | $ (18) | $ (1,498,748) | $ (3,263) | $ 152 | $ (242,707)
Balance (in shares) at Dec. 31, 2017 | 102,046 |  |  |  | (150) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Distributions to noncontrolling interest | $ 0 | 0 | 0 | 0 | $ 0 | (5,955) | (5,955)
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding | $ (8) | (1,926) | 0 | 0 | 0 | 0 | (1,934)
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding (in shares) | (798) |  |  |  |  |  |
Stock-based compensation | $ 0 | 3,233 | 0 | 0 | 0 | 0 | 3,233
Cash dividend forfeited | 0 | 72 | 0 | 0 | 0 | 0 | 72
Retirement of treasury stock | $ 0 | (3,263) | 0 | 0 | $ 3,263 | 0 | 0
Retirement of treasury stock (in shares) | (150) |  |  |  | 150 |  |
Net income | $ 0 | 0 | 0 | 395,056 | $ 0 | 11,272 | 406,328
Other comprehensive income | 0 | 0 | 15 | 0 | 0 | 0 | 15
Balance at Dec. 31, 2018 | $ 1,011 | 1,256,267 | (3) | (1,103,692) | 0 | 5,469 | 159,052
Balance (in shares) at Dec. 31, 2018 | 101,098 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Distributions to noncontrolling interest | $ 0 | 0 | 0 | 0 | 0 | (10,553) | (10,553)
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding | $ 2 | 536 | 0 | 0 | 0 | 0 | 538
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding (in shares) | 190 |  |  |  |  |  |
Stock-based compensation | $ 0 | 2,056 | 0 | 0 | 0 | 0 | 2,056
Net income | 0 | 0 | 0 | 157,288 | 0 | 33,705 | 190,993
Other comprehensive income | 0 | 0 | 30 | 0 | 0 | 0 | 30
Balance at Dec. 31, 2019 | $ 1,013 | 1,258,859 | 27 | (946,404) | 0 | 28,621 | $ 342,116
Balance (in shares) at Dec. 31, 2019 | 101,288 |  |  |  |  |  | 101,288
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Distributions to noncontrolling interest | $ 0 | 0 | 0 | 0 | 0 | (30,474) | $ (30,474)
Equity activity of noncontrolling interest from a consolidated variable interest entity | 0 | 0 | 0 | 0 | 0 | 366 | 366
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding | $ 1 | 343 | 0 | 0 | 0 | 0 | 344
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding (in shares) | 104 |  |  |  |  |  |
Stock-based compensation | $ 0 | 1,698 | 0 | 0 | 0 | 0 | 1,698
Net income | 0 | 0 | 0 | 224,402 | 0 | 69,412 | 293,814
Other comprehensive income | 0 | 0 | (27) | 0 | 0 | 0 | (27)
Balance at Dec. 31, 2020 | $ 1,014 | $ 1,260,900 | $ 0 | $ (722,002) | $ 0 | $ 67,925 | $ 607,837
Balance (in shares) at Dec. 31, 2020 | 101,392 |  |  |  |  |  | 101,392

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