Other Real Estate - Other Real Estate, By Geographic Location (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Other real estate, excluding covered other real estate [Line Items]
Total other real estate		$ 31,974	$ 34,668	$ 36,475	$ 43,228
Alabama [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate		6,501	6,873
Florida [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate		6,983	8,771
Mississippi [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	[1]	17,646	17,255
Tennessee [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	[2]	$ 844	1,025
Texas [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate			$ 744

[1] Mississippi includes Central and Southern Mississippi Regions.

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