Loans and the Allowance for Loan Losses (Narrative) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Loans and the Allowance for Loan Losses [Abstract]
Loans and Leases Receivable, Related Parties	$ 19,490,000	$ 10,279,000
Loans and Leases Receivable, Related Parties, Additions	3,969,000
Loans and Leases Receivable, Related Parties, Collections	4,668,000
Loans Pledged as Collateral	545,300,000	469,500,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	182,000	378,000
Loans performing under the restructured terms	6,900,000
Percent Of Performing Troubled Debt Restructurings, Restructured in Current Periods	88.40%
Financing Receivable, Modifications, Recorded Investment	8,400,000	11,100,000
Loans modified in troubled debt restructuring on non-accrual status	1,600,000	3,700,000
Loans on which concessions were made	1,600,000
Loans on which two or more concessions were made	$ 6,800,000