Overview and Basis of Presentation (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2021 $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Jun. 30, 2021 shares	Dec. 31, 2020 shares	Jun. 30, 2020 shares	Dec. 31, 2019 shares
Sale of Stock [Line Items]
Proceeds from initial public offering, net of underwriting discounts | $			$ 1,069,348	$ 0
Deferred offering costs reclassified to stockholders' equity (deficit) | $		$ 7,000
Redeemable convertible preferred stock, outstanding (in shares)	0	0	0	153,938,000	153,938,000	153,937,730	153,938,000	153,938,000
Number of shares issued in conversion (in shares)	1	1	1
Stock split ratio, common stock	10
IPO
Sale of Stock [Line Items]
Public offering price (in USD per share) | $ / shares	$ 36.00	$ 36.00	$ 36.00
IPO | Class A Common Stock
Sale of Stock [Line Items]
Number of shares issued and sold (in shares)	31,350,000
Over-Allotment Option
Sale of Stock [Line Items]
Number of shares issued and sold (in shares)	2,850,000