Allowances for Loan Losses (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	$ 38,618	$ 56,819
Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	88,475	82,404
Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	576,465	487,495
1-3 (Pass) [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	29,719	48,298
1-3 (Pass) [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	86,587	80,140
1-3 (Pass) [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	569,760	478,186
4 (Monitor) [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	7,399	7,021
4 (Monitor) [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	606	739
4 (Monitor) [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	4,424	4,748
5 (Substandard) [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net
5 (Substandard) [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net
5 (Substandard) [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net
6 (Doubtful) [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net
6 (Doubtful) [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net
6 (Doubtful) [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net
Impaired [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	1,500	1,500
Impaired [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	1,282	1,525
Impaired [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	$ 2,281	$ 4,561