Other Real Estate and Covered Other Real Estate (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	$ 92,509	$ 106,539
Additions	20,532	24,601
Disposals	(21,300)	(20,827)
Write-downs	(993)	(3,343)
Balance at end of period	90,748	106,970
Gain, net on the sale of other real estate included in ORE/Foreclosure expense	2,268	636
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	92,509	106,539
Covered other real estate, beginning of period	6,060	5,108
Transfers from covered loans	177	218
FASB ASC 310-30 adjustment for the residual recorded investment	(917)	(39)
Net transfers from covered loans	(740)	179
Disposals	(1,188)	(632)
Write-downs	(377)	(783)
Covered other real estate, end of period	3,755	3,872
Loss, net on the sale of covered other real estate included in ORE/Foreclosure expense	(99)	(109)
Covered Other Real Estate by Type of Property [Line Items]
Total covered other real estate	6,060	$ 5,108
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	64,829
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	61,015
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	7,990
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	7,990
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	16,434
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	19,696
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
Construction, Land Development And Other Land Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, beginning of period	1,917
Covered other real estate, end of period	768
Covered Other Real Estate by Type of Property [Line Items]
Total covered other real estate	1,917
1-4 Family Residential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, beginning of period	1,103
Covered other real estate, end of period	296
Covered Other Real Estate by Type of Property [Line Items]
Total covered other real estate	296
Nonfarm, Nonresidential Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, beginning of period	2,296
Covered other real estate, end of period	1,963
Covered Other Real Estate by Type of Property [Line Items]
Total covered other real estate	1,963
Other Real Estate Properties [Member]
Other real estate, excluding covered other real estate [Line Items]
Covered other real estate, beginning of period	744
Covered other real estate, end of period	728
Covered Other Real Estate by Type of Property [Line Items]
Total covered other real estate	$ 728