Earnings Per Share (Reconciliation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]
Net income	$ 3,368	$ 3,010	$ 9,636	$ 8,652
Weighted average common shares outstanding
Basic	3,912,237	3,876,647	3,894,653	3,853,030
Effect of dilutive employee stock options	20,965	12,610	19,787	21,660
Diluted	3,933,202	3,889,257	3,914,440	3,874,690
Anti-dilutive options excluded from earnings per share calculation	25,500	129,030	30,500	127,030
Per Common Share Data:
Basic earnings per share	$ 0.86	$ 0.78	$ 2.47	$ 2.25
Diluted earnings per share	$ 0.86	$ 0.77	$ 2.46	$ 2.23