Loans and Allowance for Loan Losses (Details Textual)	Jun. 30, 2013	Dec. 31, 2012
Loan and Allowance For Loan Losses (Textual)
Part of loans of 30 days or More past due as a percentage of total loan portfolio	0.77%	1.11%
Commercial [Member]
Loan and Allowance For Loan Losses (Textual)
Part of loans of 30 days or More past due as a percentage of total loan portfolio	0.58%	0.94%
Consumer [Member]
Loan and Allowance For Loan Losses (Textual)
Part of loans of 30 days or More past due as a percentage of total loan portfolio	0.19%	0.17%