Leases - Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: operating cash flows from operating leases	$ 2,493	$ 2,359
Weighted average remaining lease term, operating leases	5 years 8 months 12 days	6 years 8 months 12 days
Weighted average discount rate, operating leases	6.30%	6.50%