Other Real Estate and Covered Other Real Estate (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	$ 92,509	$ 106,539
Additions	26,832	29,972
Disposals	(33,015)	(34,641)
Write-downs	(2,371)	(4,833)
Balance at end of period	83,955	97,037
Gain, net on the sale of other real estate included in ORE/Foreclosure expense	2,116	2,847
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	83,955	$ 106,539
Construction, Land Development And Other Land Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	61,015
Balance at end of period	55,485
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	55,485
1 - 4 Family Residential Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	10,150
Balance at end of period	9,466
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	9,466
Nonfarm, Nonresidential Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	19,696
Balance at end of period	17,509
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	17,509
Other Real Estate Properties [Member]
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	1,648
Balance at end of period	1,495
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	$ 1,648