Common Stock- Global Employee Stock Purchase Plan (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 22, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Class of Stock [Line Items]
Net proceeds received		$ 0	$ 58,349
Employee stock purchase plan contributions		$ 2,589		$ 0
ESPP
Class of Stock [Line Items]
Maximum percent of eligible compensation available to contribute	15.00%
Maximum employee annual contribution amount	$ 25
Purchase price of common stock, percent	85.00%
Class B Common Stock | ESPP
Class of Stock [Line Items]
Shares reserved for future issuance (in shares)	25,000,000
Shares issued (in shares)		104,716
Net proceeds received		$ 3,845
Shares purchased (in shares)		111,486
Shares sold back (in shares)		6,770
Share-based compensation tax withholding payment		$ 438