Loans and Allowance for Loan and Lease Losses (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013 D Quarters	Dec. 31, 2012
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Loans classified as nonaccrual that are less than 30 days past due	$ 2,639,000	$ 2,967,000
Loans and Allowance for Loan and Lease Losses (Additional Textual) [Abstract]
Number of Methodologies	Three
Satisfactory Performance Period	six months above
Periods of restructuring loans past due	12 months
Period of loan transferred to nonaccrual	90 days
Limited days for charging off unsecured loan	120
Amount of forgiveness of debt required to be approved by Loan Committee	50,000
Quarters used to calculate required ALLL without specific reserve	12
Number of years taken into account for borrower's historic cash flows for grade one	five
Borrower rating, grade nine doubtful	9
Borrower rating, grade eight substandard	8
Number of days for delay in payment	90 days
Troubled debt restructurings part of non-accrual loans	2,877,000	2,750,000
Commercial Real Estate Loans [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Loans classified as nonaccrual that are less than 30 days past due		2,000
Residential Real Estate Loans [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Loans classified as nonaccrual that are less than 30 days past due	480,000	647,000
Construction Real Estate Loans [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Loans classified as nonaccrual that are less than 30 days past due	1,996,000	2,091,000
Commercial Loan [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Loans classified as nonaccrual that are less than 30 days past due	160,000	223,000
Consumer loans [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Loans classified as nonaccrual that are less than 30 days past due	3,000	4,000
Maximum [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Amount of Charge-offs to be approved by Chief Credit Officer	50,000,000
Loans secured by family residences	4
Minimum [Member]
Loans and Allowance for Loan and Lease Losses (Textual) [Abstract]
Amount of Charge-offs to be approved by Chief Credit Officer	$ 10,000,000
Loans secured by family residences	1