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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Capital in Excess of Par Value | Accumulated Other Comprehensive Loss | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Beginning Balance (in shares) at Dec. 31, 2018 |  | 173,530 |  |  |
Beginning Balance at Dec. 31, 2018 | $ 1,717,575 | $ 17 | $ 3,147,925 | $ (6,316) | $ (1,424,051)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Shares issued under equity compensation plans (in shares) |  | 2,975 |  |  |
Shares issued under equity compensation plans | 23,377 | $ 0 | 23,377 |  |
Stock-based compensation | 99,795 |  | 99,795 |  |
Comprehensive loss | (435,356) |  |  | 5,311 | (440,667)
Ending Balance (in shares) at Dec. 31, 2019 |  | 176,505 |  |  |
Ending Balance at Dec. 31, 2019 | 1,405,391 | $ 17 | 3,271,097 | (1,005) | (1,864,718)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Shares issued under equity compensation plans (in shares) |  | 3,586 |  |  |
Shares issued under equity compensation plans | 23,373 | $ 1 | 23,372 |  |
Stock-based compensation | 94,261 |  | 94,261 |  |
Comprehensive loss | (445,730) |  |  | (1,290) | (444,440)
Ending Balance (in shares) at Dec. 31, 2020 |  | 180,091 |  |  |
Ending Balance at Dec. 31, 2020 | 1,077,295 | $ 18 | 3,388,730 | (2,295) | (2,309,158)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Shares issued under equity compensation plans (in shares) |  | 5,377 |  |  |
Shares issued under equity compensation plans | 33,238 | $ 1 | 33,237 |  |
Stock-based compensation | 94,674 |  | 94,674 |  |
Comprehensive loss | (525,699) |  |  | (1,862) | (523,837)
Ending Balance (in shares) at Dec. 31, 2021 |  | 185,468 |  |  |
Ending Balance at Dec. 31, 2021 | $ 679,508 | $ 19 | $ 3,516,641 | $ (4,157) | $ (2,832,995)

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