Leases - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Operating Lease, Right-of-Use Asset	$ 13,426	$ 15,078
Operating Lease, Liability	$ 14,480	$ 16,053
Operating Lease, Weighted Average Remaining Lease Term	6 years 9 months 18 days	7 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	2.30%	2.30%
Other Assets [Member]
Operating Lease, Right-of-Use Asset	$ 13,400	$ 15,100
Other Liabilities [Member]
Operating Lease, Liability	$ 14,480	$ 16,100