Leases - Narrative (Details) - 60 First Street, Cambridge, Massachusetts Lease - USD ($) $ in Millions	Mar. 31, 2023	Nov. 30, 2021
Lessee, Lease, Description [Line Items]
Term of contract, lease not yet commenced (in years)	10 years
Commencement of rent payments (in years)		11 months
Expected liability to be paid	$ 208.7