Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
Sep. 30, 2012	Dec. 31, 2011
Allowance for loan losses [Roll Forward]
Beginning Balance	$ 14,623	$ 14,967
Charge-offs	(3,211)	(3,465)
Recoveries	373	237
Provision	2,156	2,884
Ending Balance	13,941	14,623
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	4,574	5,098
Collectively evaluated for impairment	9,367	9,525
Total ending allowance balances	13,941	14,623
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	26,986	29,199
Collectively Evaluated for Impairment	665,378	642,194
Total ending loan balances	692,364	671,393
Real Estate Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning Balance	897	4,684
Charge-offs	(1,521)	(467)
Recoveries	1	29
Provision	1,668	(3,349)
Ending Balance	1,045	897
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	198	328
Collectively evaluated for impairment	847	569
Total ending allowance balances	1,045	897
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	2,943	3,804
Collectively Evaluated for Impairment	45,797	38,404
Total ending loan balances	48,740	42,208
Real estate loans Secured by Farmland [Member]
Allowance for loan losses [Roll Forward]
Beginning Balance	110	107
Charge-offs	0	0
Recoveries	0	0
Provision	(3)	3
Ending Balance	107	110
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	107	110
Total ending allowance balances	107	110
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	9,438	10,047
Total ending loan balances	9,438	10,047
Real Estate Secured by 1 - 4 Family Residential [Member]
Allowance for loan losses [Roll Forward]
Beginning Balance	7,465	3,965
Charge-offs	(740)	(2,062)
Recoveries	268	41
Provision	(1,158)	5,521
Ending Balance	5,835	7,465
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	2,577	3,076
Collectively evaluated for impairment	3,258	4,389
Total ending allowance balances	5,835	7,465
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	9,937	12,675
Collectively Evaluated for Impairment	244,142	224,085
Total ending loan balances	254,079	236,760
Other Real Estate Loans [Member]
Allowance for loan losses [Roll Forward]
Beginning Balance	4,385	4,771
Charge-offs	(715)	(438)
Recoveries	65	98
Provision	1,029	(46)
Ending Balance	4,764	4,385
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	1,408	1,192
Collectively evaluated for impairment	3,356	3,193
Total ending allowance balances	4,764	4,385
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	11,667	10,313
Collectively Evaluated for Impairment	247,012	265,115
Total ending loan balances	258,679	275,428
Commercial [Member]
Allowance for loan losses [Roll Forward]
Beginning Balance	1,621	1,055
Charge-offs	(189)	(180)
Recoveries	9	41
Provision	553	705
Ending Balance	1,994	1,621
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	361	502
Collectively evaluated for impairment	1,633	1,119
Total ending allowance balances	1,994	1,621
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	2,409	2,407
Collectively Evaluated for Impairment	106,553	92,020
Total ending loan balances	108,962	94,427
Consumer [Member]
Allowance for loan losses [Roll Forward]
Beginning Balance	145	385
Charge-offs	(46)	(318)
Recoveries	30	28
Provision	67	50
Ending Balance	196	145
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	30	0
Collectively evaluated for impairment	166	145
Total ending allowance balances	196	145
Ending loan recorded investment balances [Abstract]
Individually Evaluated for Impairment	30	0
Collectively Evaluated for Impairment	12,436	12,523
Total ending loan balances	$ 12,466	$ 12,523

A valuation allowance for financing receivables that are expected to be uncollectible.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

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