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Allowance for Loan Losses and Credit Quality Indicators (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Loans and Allowance for Loan Losses and Credit Quality Indicators (Textual) [Abstract]
Minimum commercial loan relationships to be reviewed by loan review function	$ 2,000,000		$ 2,000,000
Total loan restructurings	7,460,000		7,460,000		9,450,000
Net nonaccrual status	4,780,000		4,780,000		3,270,000
Allowance for loan losses	675,000		675,000		1,140,000
Interest income recognized on loan restructurings	81,000	210,000	175,000	333,000
Restructured loans to borrowers experiencing financial difficulty in excess of	250,000		250,000
Payment defaults on loans modified as TDRs	0	0
Time period for restructuring			12 months
Nonperforming TDRs	469,000		469,000		600,000
Percentage of Total TDR	6.29%		6.29%		6.35%
Performing status returned period			6 months
Accruing loans			0
Accruing loans contractually past due 90 days or more	$ 17,945,000		$ 17,945,000		$ 13,935,000
Payment performance period			6 months
Nonaccrual loans maximum period			29 days
Nonaccrual loans minimum period			0 days