Other Real Estate and Covered Other Real Estate - Covered Other Real Estate by Type of Property (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other real estate, covered other real estate [Line Items]
Total covered other real estate	$ 1,651	$ 6,060	$ 5,108	$ 5,741
Construction, Land Development and Other Land [Member]
Other real estate, covered other real estate [Line Items]
Total covered other real estate	638	1,917
Secured by 1-4 Family Residential Properties [Member]
Other real estate, covered other real estate [Line Items]
Total covered other real estate	223	1,103
Loans secured by Nonfarm, Nonresidential Properties [Member]
Other real estate, covered other real estate [Line Items]
Total covered other real estate	399	2,296
Other Real Estate Secured [Member]
Other real estate, covered other real estate [Line Items]
Total covered other real estate	$ 391	$ 744