Other Real Estate - Other Real Estate, By Geographic Location (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
Alabama [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate		3,725	8,133
Florida [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate		3,665	5,877
Mississippi [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	[1]	8,718	14,919
Tennessee [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	[2]	$ 140	$ 319

[1] Mississippi includes Central and Southern Mississippi Regions.

[2] Tennessee includes Memphis, Tennessee and Northern Mississippi Regions.