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Debt - Convertible Senior Notes and Capped Call Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands | Mar. 16, 2021 | Feb. 28, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Net cost of capped call purchase | $ 25,500 | $ 43,320
Class A voting common stock |  |
Debt Instrument [Line Items] |  |
Capped call shares (in shares) | 1,917,472 | 4,394,276
0.25% Convertible senior notes due 2026 | Convertible notes |  |
Debt Instrument [Line Items] |  |
Initial conversion strike price (usd per share) |  | $ 91.03
Initial cap price (usd per share) |  | $ 137.40
0.50% Convertible senior notes due 2028 | Convertible notes |  |
Debt Instrument [Line Items] |  |
Initial conversion strike price (usd per share) | $ 179.27 |
Initial cap price (usd per share) | $ 260.76 |

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