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Fair Value - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) item Installment	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) item Installment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) item
Fair Value
Transfers between Level 1 to Level 2			$ 0
Transfers between Level 2 to Level 1			0
Milestone payment receivable	$ 38,600,000		$ 38,600,000
Number of equal annual installments milestone payment | Installment	6		6
Percentage of discount recovery rate	18.00%		18.00%		18.00%
Contingent consideration	$ 29,100,000		$ 29,100,000		$ 32,500,000
Contingent consideration included within prepaid expenses and other current assets	6,500,000		6,500,000		7,800,000
Contingent consideration included within contingent consideration	22,632,000		22,632,000		24,651,000
Increase (decrease) in the fair value of contingent consideration	3,240,000	$ 5,900,000	4,518,000	$ 12,700,000
2026 Term Loans
Fair Value
Amount to be realized in future	$ 297,800,000		$ 297,800,000
2023 Term Loans
Fair Value
Amount to be realized in future					$ 275,100,000
First Scenario
Fair Value
Percentage of substantial doubt about going concern	55.00%		55.00%		50.00%
Second Scenario
Fair Value
Percentage of substantial doubt about going concern	45.00%		45.00%		50.00%
Discount Rate
Fair Value
Discount rate (as a percent) | item	13		13		13
Maximum
Fair Value
Milestone payment receivable	$ 80,000,000.0		$ 80,000,000.0

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