Loans (Details 9) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Commercial and Industrial
Troubled Debt Restructuring
Number of Contracts	6	7
Pre-modification outstanding recorded investment	$ 661	$ 1,162
Post-modification outstanding recorded investment	614	903
Default during the quarter
Number of Contracts	2
Recorded investment
Commercial Real Estate
Troubled Debt Restructuring
Number of Contracts	3	7
Pre-modification outstanding recorded investment	603	4,371
Post-modification outstanding recorded investment	570	4,369
Default during the quarter
Number of Contracts	1	3
Recorded investment	45	459
Residential Real Estate [Member]
Troubled Debt Restructuring
Number of Contracts	1
Pre-modification outstanding recorded investment	121
Post-modification outstanding recorded investment	89
Commercial Construction and Development
Troubled Debt Restructuring
Number of Contracts		2
Pre-modification outstanding recorded investment		145
Post-modification outstanding recorded investment		$ 143