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Stock-Based Compensation and Other Benefit Plans - Stock Options - Narratives (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement [Abstract] |  |  |
Granted (in shares) | 1,327,795 | 3,000,000 |
Number of stock options vested (in shares) | 100,000 | 0 |
Number of stock options forfeited (in shares) | 556,497 | 0 | 0
Unrecognized compensation cost related to stock options | $ 3.6 |  |

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