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Employee Stock Purchase and Equity-Based Compensation Plans - Summary of Stock Issuance Activity (Details) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Purchase price paid for shares sold | $ 4,386 | $ 536,879 | $ 0
Employee Stock Purchase Plan |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Purchase price paid for shares sold | $ 4,386 |  |
Number of shares sold | 127 |  |

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