Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lease, Cost [Abstract]
Operating lease cost	$ 1,629	$ 1,404	$ 4,547	$ 4,153
Short-term lease cost	122	135	558	388
Variable lease cost	73	188	(458)	450
Total lease cost	$ 1,824	$ 1,727	4,647	4,991
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases			$ 4,902	$ 2,793
Weighted-average remaining lease term — operating leases	4 years 9 months 18 days	5 years 1 month 6 days	4 years 9 months 18 days	5 years 1 month 6 days
Weighted-average discount rate — operating leases	4.20%	4.90%	4.20%	4.90%