Stock-Based Compensation - Restricted Stock Units - Unrecognized Compensation Cost (Details) $ in Thousands	6 Months Ended
Jun. 30, 2021 USD ($)
Stock Based Compensation
Total	$ 1,481,588
Unvested stock options
Stock Based Compensation
Unvested stock options	$ 203,631
Weighted-average period (in years)	2 years 4 months 24 days
Unvested restricted stock units and awards
Stock Based Compensation
Unrecognized compensation cost, other than options	$ 1,217,788
Weighted-average period (in years)	3 years 1 month 6 days
Class A shares in escrow subject to future vesting
Stock Based Compensation
Unrecognized compensation cost, other than options	$ 53,019
Weighted-average period (in years)	2 years 3 months 18 days
ESPP
Stock Based Compensation
Unrecognized compensation cost, other than options	$ 7,150
Weighted-average period (in years)	4 months 24 days

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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