Leases - Components of lease expense and other information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lease cost
Amortization of right-of-use assets	$ 455	$ 412	$ 1,438	$ 1,781
Interest on lease liabilities	64	63	185	277
Operating lease cost	1,509	1,435	4,823	4,059
Variable lease cost	280	363	1,061	978
Short-term lease cost	5	4	18	10
Sublease income	(65)	(65)	(195)	(173)
Total lease cost	$ 2,248	$ 2,212	$ 7,330	$ 6,932
Weighted-average remaining lease term (years)
Operating leases	3 years 5 months 1 day	4 years 3 days	3 years 5 months 1 day	4 years 3 days
Finance leases	2 years	2 years 6 months	2 years	2 years 6 months
Weighted-average discount rate
Operating leases	4.50%	5.00%	4.50%	5.00%
Finance leases	4.50%	4.70%	4.50%	4.70%