Leases - Additional Information (Details) $ in Thousands		1 Months Ended	3 Months Ended
	Dec. 20, 2021 USD ($) ft²	Oct. 31, 2019 ft²	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Lessee Lease Description [Line Items]
Operating Lease, Liability, Noncurrent			$ 75,975	$ 77,028
impairment charge			4,900
Undiscounted Future Lease Payments			2,600
Land, Buildings and Improvements [Member]
Lessee Lease Description [Line Items]
Operating Lease, Liability, Noncurrent			48,900
Operating Lease, Payments			48,900
landlord [Member]
Lessee Lease Description [Line Items]
Property And Equipment Improvements			12,100
Tenant Improvement Allowance			17,600
Watertown, Massachusetts
Lessee Lease Description [Line Items]
Lease term	134 months
Watertown, Massachusetts | Noncancelable Facility Lease Agreement
Lessee Lease Description [Line Items]
Area of office space | ft²	100,624	34,522
Lease term		120 months
Lease expiration date		Mar. 31, 2030
Lease additional term	5 years	5 years
Tenant incentive allowance receivable	$ 20,100
Base Rent	$ 800
Annual increase percentage of rent	3.00%
Watertown, Massachusetts | Noncancelable Facility Lease Agreement | Restricted Cash | Letter of Credit | 2019 Lease
Lessee Lease Description [Line Items]
Security deposit			1,300	1,300
Watertown, Massachusetts | Noncancelable Facility Lease Agreement | Restricted Cash | Letter of Credit | 2021 Lease
Lessee Lease Description [Line Items]
Security deposit			$ 4,500	$ 4,500
Watertown, Massachusetts | Facility Sublease Agreement
Lessee Lease Description [Line Items]
Lease commencement date	Dec. 31, 2023