Fair Value Measurements - Summary of Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 136,190	$ 75,800	$ 5,172	$ 23,429
Embedded derivative recognized under Term Loan 2			0	51,328
Contingent consideration recognized due to acquisitions	38,300	0	47,900	2,695
Warrants acquired in the Business Combination			163,058	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	0	(16,059)	0	(16,059)
Contingent consideration settled through equity			0	(1,958)
Contingent consideration payments	0	(3,000)	(2,214)	(3,000)
Ending Balance	185,199	61,879	185,199	61,879
Embedded Derivative Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value adjustments	0	5,138	0	5,444
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value adjustments	(3,940)	0	(4,152)	0
Warrant Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value adjustments	$ 14,649	$ 0	$ (24,565)	$ 0