Securities - Other Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt and Equity Securities, FV-NI [Line Items]
Other investments	$ 12,913	$ 11,499
Federal Reserve Bank Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Other investments	7,917	7,010
Federal Home Loan Bank Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Other investments	4,646	4,139
First National Bankers Bank Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Other investments	$ 350	$ 350