Leases - Components of lease expense and other information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lease cost
Amortization of right-of-use assets	$ 458	$ 803	$ 983	$ 1,369
Interest on lease liabilities	57	123	121	214
Operating lease cost	1,737	1,332	3,314	2,624
Variable lease cost	266	309	781	615
Short-term lease cost	8	2	13	6
Sublease income	(65)	(65)	(130)	(108)
Total lease cost	$ 2,461	$ 2,504	$ 5,082	$ 4,720
Weighted-average remaining lease term (years)
Operating leases	3 years 7 months 2 days	4 years 1 month 17 days	3 years 7 months 2 days	4 years 1 month 17 days
Finance leases	2 years 2 months 8 days	2 years 7 months 13 days	2 years 2 months 8 days	2 years 7 months 13 days
Weighted-average discount rate
Operating leases	4.50%	5.20%	4.50%	5.20%
Finance leases	4.50%	4.80%	4.50%	4.80%