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Stockholders' Equity - RSU and PSU - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 09, 2021 | Sep. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Recorded share-based compensation expense |  |  | $ 219,500 |  |
Tax payments, for net share settlement of share based award |  |  | $ 182,517 | $ 6,886 |
Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Aggregate intrinsic value price per share (in dollars per share) |  | $ 175.02 | $ 175.02 |  |
Restricted Stock Units (RSUs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Aggregate intrinsic value price per share (in dollars per share) |  | $ 175.02 | $ 175.02 |  |
Unrecognized stock-based compensation expense |  | $ 63,700 | $ 63,700 |  |
Weighted average period over which costs are recognized |  |  | 2 years 1 month 20 days |  |
Number of shares vested |  |  | 348 |  |
Number of units outstanding (in shares) |  | 856 | 856 |  | 1,107
Shares withheld, for net share settlement of share based award (in shares) |  |  | 51 |  |
Tax payments, for net share settlement of share based award |  |  | $ 8,500 |  |
Performance Stock Units (PSUs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Aggregate intrinsic value price per share (in dollars per share) |  | $ 175.02 | $ 175.02 |  |
Unrecognized stock-based compensation expense |  | $ 38,300 | $ 38,300 |  |
Weighted average period over which costs are recognized |  |  | 2 years 1 month 6 days |  |
Performance criteria had been met (in shares) |  |  | 4 |  |
Number of shares vested |  |  | 3,896 |  |
Number of units outstanding (in shares) |  | 1,881 | 1,881 |  | 5,618
Shares withheld, for net share settlement of share based award (in shares) |  |  | 1,000 |  |
Tax payments, for net share settlement of share based award |  |  | $ 174,000 |  |
Performance Stock Units (PSUs) | Related to Release Of Tranches Four Through Eight |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Tax payments, for net share settlement of share based award |  |  | 900 |  |
eXponential Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Percentage of vesting | 4.00% |  |  |  |
Modification, number of shares vested | 99 |  |  |  |
Modification, stock-based compensation expense |  | $ 1,900 | $ 2,800 |  |
Minimum | eXponential Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Minimum holding period |  |  | 2 years 6 months |  |

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