Leases - Lease Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets:
Operating lease right-of-use assets	$ 9,076	$ 8,140
Liabilities:
Operating lease liabilities	3,988	4,847
Long-term operating lease liabilities	11,425	7,920
Total operating lease liabilities	$ 15,413	$ 12,767
Weighted average remaining lease term (years)	7 years 2 months 15 days	4 years 6 months
Weighted average discount rate	3.70%	3.40%