Loans Receivable (Details Textual) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Loans	Dec. 31, 2011 Loans
Loans Receivable (Textual) [Abstract]
Troubled debt restructurings, allowance	$ 2,900,000	$ 2,900,000	$ 2,600,000
Loans classified as a Troubled Debt Restructurings	37,800,000	37,800,000	37,100,000
Non-accrual loans	19,800,000	19,800,000	19,400,000
Accrual loans status	18,000,000	18,000,000	17,700,000
Commitment to lend additional amounts to customers with outstanding loans	0	0	0
Minimum period to reduce interest rate as a modification in term of loan		1 year
Maximum period to reduce interest rate as a modification in term of loan		7 years
Troubled debt restructurings, provision for loan losses period increase (decrease)	0	228,000
Troubled debt restructurings, charge-offs	100,000	100,000
Loans modified	2,200,000	2,200,000
Interest income on impaired loans		3,400,000
Financing receivable modification extension period minimum		2 years
Financing receivable modification extension period maximum		7 years
Number of loans 90 days or more past due and still accruing interest		5	0
Loans past due more than 90 days and still accruing interest	$ 1,500,000	$ 1,500,000
Payment default classification period		90 days