Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance by impairment methodology and loans by impairment methodology
Beginning Balance	$ 12,937	$ 16,036	$ 7,106
Loan charge-offs	(3,793)	(15,789)	(3,062)
Recoveries	376	310	261
Provision for loan losses	3,555	12,380	11,731
Ending Balance	13,075	12,937	16,036
Allowance for Credit Losses, Individually evaluated for impairment	1,838	2,438
Allowance for Credit Losses, Collectively evaluated for impairment	11,237	10,499
Total	383,594	392,440
Loans, Individually evaluated for impairment	16,980	25,920
Loans, Collectively evaluated for impairment	366,614	366,520
Commercial and Industrial [Member]
Allowance by impairment methodology and loans by impairment methodology
Beginning Balance	963	858
Loan charge-offs	(261)	(348)
Recoveries	35	3
Provision for loan losses	(129)	450
Ending Balance	608	963
Allowance for Credit Losses, Individually evaluated for impairment	35	309
Allowance for Credit Losses, Collectively evaluated for impairment	573	654
Total	23,071	29,446
Loans, Individually evaluated for impairment	160	480
Loans, Collectively evaluated for impairment	22,911	28,966
Other Real Estate [Member]
Allowance by impairment methodology and loans by impairment methodology
Beginning Balance	5,192	9,187
Loan charge-offs	(2,154)	(7,551)
Recoveries	64
Provision for loan losses	3,061	3,556
Ending Balance	6,163	5,192
Allowance for Credit Losses, Individually evaluated for impairment	930	351
Allowance for Credit Losses, Collectively evaluated for impairment	5,233	4,841
Total	174,220	181,141
Loans, Individually evaluated for impairment	10,528	10,940
Loans, Collectively evaluated for impairment	163,692	170,201
Construction and Land Development [Member]
Allowance by impairment methodology and loans by impairment methodology
Beginning Balance	2,843	4,050
Loan charge-offs	(431)	(2,983)
Recoveries	1	50
Provision for loan losses	68	1,726
Ending Balance	2,481	2,843
Allowance for Credit Losses, Individually evaluated for impairment	567	930
Allowance for Credit Losses, Collectively evaluated for impairment	1,914	1,913
Total	43,524	48,363
Loans, Individually evaluated for impairment	2,516	7,640
Loans, Collectively evaluated for impairment	41,008	40,723
Secured by 1-4 family residential [Member]
Allowance by impairment methodology and loans by impairment methodology
Beginning Balance	3,766	1,681
Loan charge-offs	(761)	(4,369)
Recoveries	68	6
Provision for loan losses	639	6,718
Ending Balance	3,712	3,766
Allowance for Credit Losses, Individually evaluated for impairment	306	848
Allowance for Credit Losses, Collectively evaluated for impairment	3,406	2,918
Total	134,964	122,339
Loans, Individually evaluated for impairment	3,776	6,860
Loans, Collectively evaluated for impairment	131,188	115,479
Consumer and Other Loans [Member]
Allowance by impairment methodology and loans by impairment methodology
Beginning Balance	173	260
Loan charge-offs	(186)	(268)
Recoveries	208	251
Provision for loan losses	(84)	(70)
Ending Balance	111	173
Allowance for Credit Losses, Collectively evaluated for impairment	111	173
Total	7,815	11,151
Loans, Collectively evaluated for impairment	$ 7,815	$ 11,151

Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

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Reflects a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts.

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Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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-Name Accounting Standards Codification

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-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 310

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph a(ii)

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

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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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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

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