Loans (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Nonaccrual loans	$ 4,887,000	$ 7,866,000	$ 4,887,000	$ 7,866,000	$ 7,361,000
Past due loans greater than 90 days and still accruing
Nonperforming loans minimum threshold for individual impairment evaluation			50,000
Recorded investment in loans considered to be impaired	13,148,000	10,867,000	13,148,000	10,867,000	9,452,000
Loans classified as troubled debt restructurings	11,558,000	4,100,000	11,558,000	4,100,000	4,500,000
Charge-offs on troubled debt restructurings	69,000	354,000	853,000	1,073,000
Percent of loan portfolio scheduled to mature over next twelve months	17.00%		17.00%
Percent of loan portfolio scheduled to mature after one year before four years	20.00%		20.00%
Seven Troubled Debt Restructurings [Member]
Troubled debt restructurings, Total recorded investment	3,500,000		3,500,000
Troubled debt restructurings, Total recorded investment impairment amount	729,000		729,000
Two Charge-offs [Member]
Charge-offs on troubled debt restructurings			$ 280,000