Loans and Allowance for Loan Losses Schedule of Past Due Loans (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	$ 644		$ 747
Loans, recorded investment, 60 to 89 days past due	4,257		406
Loans, recorded investment, equal to greater than 90 days past due	3,003		5,583
Loans, recorded investment, past due	7,904		6,736
Loans, recorded investment, current	951,722		921,071
Loans	959,626		927,807
Loans, recorded investment, 90 days past due and still accruing	1,046	[1]	0
Loans, recorded investment, nonaccrual status	7,286		6,400
Nonaccrual loans, 30-59 days past due [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, nonaccrual status	0		74
Nonaccrual loans, 60-89 days past due [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, nonaccrual status	4,257		236
Nonaccrual loans, greater than 90 days past due [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, nonaccrual status	1,957		5,583
Nonaccrual loans, total past due [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, nonaccrual status	6,214		5,893
Nonaccrual loans, recorded investment, current [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, nonaccrual status	1,072		507
Commercial loan [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	91		146
Loans, recorded investment, 60 to 89 days past due	4,257		0
Loans, recorded investment, equal to greater than 90 days past due	848		331
Loans, recorded investment, past due	5,196		477
Loans, recorded investment, current	225,645		281,647
Loans	230,841		282,124
Loans, recorded investment, 90 days past due and still accruing	537	[1]	0
Construction, land, and land development [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	216		0
Loans, recorded investment, 60 to 89 days past due	0		0
Loans, recorded investment, equal to greater than 90 days past due	0		3,356
Loans, recorded investment, past due	216		3,356
Loans, recorded investment, current	133,832		118,555
Loans	134,048		121,911
Loans, recorded investment, 90 days past due and still accruing	0	[1]	0
1-4 family residential first mortgages [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	65		89
Loans, recorded investment, 60 to 89 days past due	0		143
Loans, recorded investment, equal to greater than 90 days past due	704		152
Loans, recorded investment, past due	769		384
Loans, recorded investment, current	45,751		48,896
Loans	46,520		49,280
Loans, recorded investment, 90 days past due and still accruing	0	[1]	0
Home equity loan [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	106		279
Loans, recorded investment, 60 to 89 days past due	0		27
Loans, recorded investment, equal to greater than 90 days past due	8		0
Loans, recorded investment, past due	114		306
Loans, recorded investment, current	26,569		25,230
Loans	26,683		25,536
Loans, recorded investment, 90 days past due and still accruing	0	[1]	0
Commercial real estate [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	118		38
Loans, recorded investment, 60 to 89 days past due	0		236
Loans, recorded investment, equal to greater than 90 days past due	1,443		1,744
Loans, recorded investment, past due	1,561		2,018
Loans, recorded investment, current	512,056		439,839
Loans	513,617		441,857
Loans, recorded investment, 90 days past due and still accruing	509	[1]	0
Consumer and other loans [Member]
Loans, Recorded Investment, Past Due [Line Items]
Loans, recorded investment, 30 to 59 days past due	48		195
Loans, recorded investment, 60 to 89 days past due	0		0
Loans, recorded investment, equal to greater than 90 days past due	0		0
Loans, recorded investment, past due	48		195
Loans, recorded investment, current	7,869		6,904
Loans	7,917		7,099
Loans, recorded investment, 90 days past due and still accruing	$ 0	[1]	$ 0

[1] (1)Subsequent to September 30, 2013, the two loans comprising the category 90 Days Past Due and Still Accruing, were brought current by the borrowers.