Commitments and Contingencies - Difference Between Undiscounted Minimum Rental Commitments Under Non-Cancelable Leases and Operating Leases Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Total	$ 30,706
Present value adjustment using incremental borrowing rate	(4,380)
Operating lease liabilities	$ 26,326
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities