Leases - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Leases
Operating Lease, Right-of-Use Asset	$ 6,300,000		$ 6,300,000		$ 6,900,000
Operating Lease, Liability	6,595,000		6,595,000		$ 7,000,000.0
Additional lease liabilities recorded	168,000		762,000
Operating Lease, Payments	444,000	$ 442,000	1,302,000	$ 1,258,000
Lease, Cost	$ 444,000	$ 420,000	$ 1,310,000	$ 1,272,000
Option to extend			true
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months		6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	4.50%		4.50%