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Stockholders' Equity (Details) - Class A common stock - USD ($) | 3 Months Ended | 50 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2020 | Oct. 22, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |
Additional authorized repurchase amount |  |  | 250,000,000
Authorized repurchase amount | $ 500,000,000 | $ 500,000,000 |
Shares repurchased pursuant to repurchase authorizations (in shares) | 529,303 | 3,684,398 |
Shares repurchased pursuant to repurchase authorizations, average price (in dollars per share) | $ 82.76 | $ 84.19 |
Remaining authorized repurchase amount | $ 189,800,000 | $ 189,800,000 |
Number of shares repurchased | 29,627 |  |
Average purchase price per share (in dollars per share) | $ 146.62 |  |
Restricted Stock Units (RSUs) |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Amount related to tax withholdings associated with vesting of RSUs | $ 4,300,000 |  |

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