Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	$ 38,318	$ 56,819
Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	78,567	82,404
Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	562,252	487,495
1-3 (Pass) [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	29,380	48,298
1-3 (Pass) [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	76,213	80,140
1-3 (Pass) [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	555,721	478,186
4 (Monitor) [Member] | Construction and Land Development [Member]
Loans by risk rating
Financing Receivable, Net	7,438	7,021
4 (Monitor) [Member] | Commercial and Industrial [Member]
Loans by risk rating
Financing Receivable, Net	472	739
4 (Monitor) [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	4,229	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	1,882	1,525
Impaired [Member] | Commercial Real Estate [Member]
Loans by risk rating
Financing Receivable, Net	$ 2,302	$ 4,561