Convertible Senior Notes (Details)	1 Months Ended
	Aug. 31, 2019 USD ($) day $ / shares	Mar. 31, 2020 $ / shares	Dec. 31, 2019 $ / shares
Class A Common Stock
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 0.001	$ 0.001
Convertible debt | 1.125% Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Face amount of debt issued	$ 345,000,000.0
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 percentage of stock price trigger	130.00%
Threshold percentage of stock trading price	98.00%
Redemption price, percentage	100.00%
Effective interest percentage	4.30%
Equity component, gross amount	$ 60,100,000
Issuance costs attributable to the liability component	7,500,000
Issuance costs attributable to the equity component	1,600,000
Convertible debt | Over-allotment option
Debt Instrument [Line Items]
Face amount of debt issued	$ 45,000,000.0
Debt Conversion Terms, One | Convertible debt | 1.125% Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Threshold number of trading days (day) | day	20
Threshold number of consecutive trading days (day) | day	30
Debt Conversion Terms, Two | Convertible debt | 1.125% Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Threshold number of trading days (day) | day	5
Threshold number of consecutive trading days (day) | day	10