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Fair Value Measurements - Schedule of Fair Value Changes by Income Statement Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total change in fair value of Class B Units			$ (728,079)	$ (113,866)
Common Stock - Class B
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total change in fair value of Class B Units	$ 129,546	$ 64,070	728,079	113,866
Cost of revenue | Common Stock - Class B
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total change in fair value of Class B Units	24,028	12,167	136,417	22,052
Sales and marketing | Common Stock - Class B
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total change in fair value of Class B Units	2,607	943	10,870	1,965
General and administrative | Common Stock - Class B
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total change in fair value of Class B Units	$ 102,911	$ 50,960	$ 580,792	$ 89,849

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