Convertible Senior Notes (Details)	1 Months Ended	9 Months Ended
	Aug. 31, 2019 USD ($) day $ / shares	Sep. 30, 2021 USD ($) $ / shares	Dec. 31, 2020 $ / shares
Class A Common Stock
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001	$ 0.001
Convertible debt | 1.125% Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Face amount of debt issued | $	$ 345,000,000
Stated interest percentage	1.125%
Proceeds from the issuance of convertible senior notes, net of issuance costs | $	$ 335,900,000
Conversion ratio	0.0124756
Conversion price (in dollars per share) | $ / shares	$ 80.16
Threshold number of trading days (day)	20
Threshold number of consecutive trading days (day)	30
Threshold percentage of stock price trigger	130.00%
Redemption price, percentage	100.00%
Effective interest percentage	4.30%
If-converted value in excess of principal | $		$ 261,700,000
Remaining life of debt instrument		4 years 9 months 18 days
Convertible debt | 1.125% Convertible Senior Notes Due 2026 | Debt Conversion Terms, One
Debt Instrument [Line Items]
Threshold number of trading days (day)	20
Threshold number of consecutive trading days (day)	30
Threshold percentage of stock price trigger	130.00%
Convertible debt | 1.125% Convertible Senior Notes Due 2026 | Debt Conversion Terms, Two
Debt Instrument [Line Items]
Threshold number of trading days (day)	5
Threshold number of consecutive trading days (day)	10
Threshold percentage of stock trading price	98.00%
Convertible debt | Over-allotment option
Debt Instrument [Line Items]
Face amount of debt issued | $	$ 45,000,000