Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (2) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Contract	Sep. 30, 2013 Contract	Sep. 30, 2014 Contract	Sep. 30, 2013 Contract
Troubled Debt Restructurings [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts			16	10
Pre-Modification Outstanding Recorded Investment			$ 1,172	$ 4,798
Post-Modification Outstanding Recorded Investment			1,158	4,737
Troubled Debt Restructurings [Member] | Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	2	1	16	6
Pre-Modification Outstanding Recorded Investment	191	32	1,172	412
Post-Modification Outstanding Recorded Investment	191	32	1,158	358
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	5	1	5
Recorded Investment	106	398	106	398
Troubled Debt Restructurings that Subsequently Defaulted [Member] | Construction Land Development and Other Land [Member]
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Contracts	0	1	0	1
Recorded Investment	0	9	0	9
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	4	1	4
Recorded Investment	$ 106	$ 389	$ 106	$ 389