Other Real Estate and Covered Other Real Estate (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Other real estate, excluding covered other real estate [Rollforward]
Balance at beginning of period	$ 92,509	$ 106,539
Additions	8,656	13,694
Disposals	(10,108)	(7,594)
Write-downs	(882)	(1,103)
Balance at end of period	90,175	111,536
Gain (Loss), net on the sale of other real estate included in ORE/Foreclosure expense	1,420	(415)
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	90,175	111,536
Covered other real estate, beginning of period	6,060	5,108
Transfers from covered loans	0	98
FASB ASC 310-30 adjustment for the residual recorded investment	(903)	(52)
Net transfers from covered loans	(903)	46
Disposals	(221)	(315)
Write-downs	(142)	(80)
Covered other real estate, end of period	4,794	4,759
Loss, net on the sale of covered other real estate included in ORE/Foreclosure expense	(53)	(120)
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	4,794	4,759
Construction Land Development and Other Land [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	942		1,917
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	942		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	1,126		1,103
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	1,126		1,103
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	1,998		2,296
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	1,998		2,296
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		744
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items]
Total covered other real estate	728		744
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	59,286		61,015
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	59,286		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	8,637		10,150
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	8,637		10,150
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	20,757		19,696
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	20,757		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		1,648
Other real estate, excluding covered other real estate [Line Items]
Total other real estate, excluding covered other real estate	$ 1,495		$ 1,648