Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (2) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract
Troubled Debt Restructurings [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			14	9
Pre-Modification Outstanding Recorded Investment			$ 981	$ 4,766
Post-Modification Outstanding Recorded Investment			967	4,705
Troubled Debt Restructurings [Member] | Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	4	3	14	5
Pre-Modification Outstanding Recorded Investment	278	131	981	380
Post-Modification Outstanding Recorded Investment	273	133	967	326
Troubled Debt Restructurings [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			0	1
Pre-Modification Outstanding Recorded Investment			0	952
Post-Modification Outstanding Recorded Investment			0	952
Troubled Debt Restructurings [Member] | Commercial and Industrial [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			0	2
Pre-Modification Outstanding Recorded Investment			0	944
Post-Modification Outstanding Recorded Investment			0	937
Troubled Debt Restructurings [Member] | Other Loans [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			0	1
Pre-Modification Outstanding Recorded Investment			0	2,490
Post-Modification Outstanding Recorded Investment			0	2,490
Troubled Debt Restructurings that Subsequently Defaulted [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	1	16	1	16
Recorded Investment	108	1,098	108	1,098
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	1	0	1
Recorded Investment	0	10	0	10
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	1	15	1	15
Recorded Investment	$ 108	$ 1,088	$ 108	$ 1,088