Securities - Other Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Other investments	$ 14,829	$ 12,913
Federal Reserve Bank Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Other investments	8,641	7,917
Federal Home Loan Bank Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Other investments	5,838	4,646
First National Bankers Bank Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Other investments	$ 350	$ 350