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Description of Business and Summary of Significant Accounting Policies - Initial and Follow-On Public Offering (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Nov. 17, 2020	Sep. 25, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsidiary, Sale of Stock [Line Items]
Payments of expenses associated with initial public offering			$ 0	$ 1,373	$ 0
Proceeds from issuance of common stock			0	58,349	4,510
Public Stock Offering - Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Payments of expenses associated with initial public offering				26,130
Follow-On Offering
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of common stock			$ 0	295,802	$ 0
Expenses associated with sale of stock				$ 12,898
Class B Common Stock | Public Stock Offering - Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)		12,360,991
Price per share sold (USD per share)		$ 22.00
Class B Common Stock | Follow-On Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)	11,500,000
Price per share sold (USD per share)	$ 32.00
Class B Common Stock | Follow-On Offering, Sold By Company
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)	9,603,965
Class B Common Stock | Follow-On Offering, Exercise By Underwriters
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)	1,500,000
Class B Common Stock | Follow-On Offering, Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)	1,896,035
Proceeds from issuance of common stock	$ 294,429
Expenses associated with sale of stock	$ 12,898

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

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