Loans and Allowance for Loan Losses (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Loans and Allowance for Loan Losses (Textual) [Abstract]
Allowance for loan losses	$ 3,617,000	$ 3,058,000
Period after which loans considered nonperforming	90 days
Amount in Troubled Debt Restructuring	2,900,000	1,200,000	1,200,000
Interest recognized on troubled debt restructuring	117,000	69,000	52,000
Increment in pretax income due to non restructuring of loans	0	4,000,000	4,000,000
Potential problem loans	$ 4,700,000	$ 8,900,000