Other Real Estate - Other Real Estate, By Type of Property (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	$ 55,968	$ 62,051	$ 72,302		$ 78,828
Construction, Land Development And Other Land Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	35,256	36,871
1 - 4 Family Residential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	6,818	7,926
Nonfarm, Nonresidential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	13,457	16,817
Other Real Estate Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Total other real estate	$ 437	$ 437

[1] The changes and gains, net on other real estate for the three months ended March 31, 2016 include covered other real estate.