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Stockholders' Equity - Summary of Restricted Stock Unit Activity and Weighted Average Exercise Price (Details) - RSUs - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Number of Shares (In thousands) |  |
Beginning balance outstanding (in shares) | 2,950 |
Awarded (in shares) | 1,565 |
Vested (in shares) | (1,244) |
Forfeited (in shares) | (250) |
Non-vested and outstanding at end of period (in shares) | 3,021 |
Expected to vest (in shares) | 1,841 |
Weighted Average Grant Date Fair Value (usd per share) |  |
Beginning balance outstanding (in dollars per share) | $ 27.00 |
Awarded (in dollars per share) |  |
Vested (in dollars per share) |  |
Forfeited (in dollars per share) |  |
Non-vested and outstanding at end of period (in dollars per share) | 38.46 |
Expected to vest (in dollars per share) | $ 36.30 |
Aggregate Fair Value (In thousands) |  |
Aggregate fair value, Non-vested and outstanding | $ 191,205 | $ 183,781
Aggregate fair value, Expected to vest | $ 116,404 |

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