Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (2) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Contract	Mar. 31, 2013 Contract
Troubled Debt Restructurings [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	10	6
Pre-Modification Outstanding Recorded Investment	$ 703	$ 4,635
Post-Modification Outstanding Recorded Investment	694	4,572
Troubled Debt Restructurings [Member] | Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	10	2
Pre-Modification Outstanding Recorded Investment	703	249
Post-Modification Outstanding Recorded Investment	694	193
Troubled Debt Restructurings [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		952
Post-Modification Outstanding Recorded Investment		952
Troubled Debt Restructurings [Member] | Commercial and Industrial [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		2
Pre-Modification Outstanding Recorded Investment		944
Post-Modification Outstanding Recorded Investment		937
Troubled Debt Restructurings [Member] | Other Loans [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		2,490
Post-Modification Outstanding Recorded Investment		2,490
Troubled Debt Restructurings that Subsequently Defaulted [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	0	23
Recorded Investment	0	1,742
Troubled Debt Restructurings that Subsequently Defaulted [Member] | Construction Land Development And Other Financing Receivable [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	0	4
Recorded Investment	0	236
Troubled Debt Restructurings that Subsequently Defaulted [Member] | Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	0	19
Recorded Investment	$ 0	$ 1,506