Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 29,369	$ 32,579
Operating lease liabilities	$ 24,763	$ 27,206
Weighted average remaining lease term (operating lease)	6 years 4 months 24 days	7 years 1 month 6 days
Weighted average discount rate (operating lease)	5.90%	5.90%
Affiliated Entity
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 21,458	$ 23,047
Operating lease liabilities	$ 15,463	$ 16,282