Commitments and Contingencies - Minimum lease commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Minimum lease commitments, Payments due by period:
2022	$ 4,901
2023	3,979
2024	3,769
2025	3,309
2026	3,496
Thereafter	35,960
Total future minimum lease payments	55,414
Less: Imputed interest	(18,143)
Total operating lease liabilities	37,271
Operating lease liability, current	$ 4,437	$ 4,148
Operating Lease, Liability, Current, Statement of Financial Position	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities
Long-term operating lease liabilities	$ 32,834	$ 6,305
Total operating lease liabilities	$ 37,271
Operating Lease, Liability, Statement of Financial Position	Long-term operating lease liabilities, Accrued expenses and other current liabilities