Loans and the Allowance for Loan Losses (Narrative) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Related Parties	$ 22,456,000	$ 18,977,000
Loans and Leases Receivable, Related Parties, Additions	11,322,000
Loans and Leases Receivable, Related Parties, Collections	7,843,000
Loans Pledged as Collateral	538,100,000	532,800,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	69,000	187,000
Financing Receivable, Modifications, Recorded Investment	2,800,000	8,300,000
Loans modified in troubled debt restructuring on non-accrual status	1,100,000	1,500,000
Loans on which concessions were made	1,500,000
Loans on which two or more concessions were made	1,300,000
Impairment Loans Threshold	200,000
Fannie Mae [Member]
Financing Receivable, Impaired [Line Items]
Loans Sold On Nonrecourse Basis	$ 8,500,000