Other Real Estate - Other Real Estate, By Type of Property (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	$ 16,248	$ 29,248	$ 31,974	$ 34,668
Construction, Land Development And Other Land Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	7,697	11,482
1 - 4 Family Residential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	1,351	3,453
Nonfarm, Nonresidential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	$ 7,200	$ 14,313