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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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