Borrowed Funds (Summary Of Short-Term Borrowings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Short-term Debt [Line Items]
Balance	$ 5,960	$ 15,956	$ 3,958	[1]
Short-Term FHLB Advances [Member]
Short-term Debt [Line Items]
Balance		15,000	3,000
Average balance outstanding for the period	24,321	13,379	12,291
Maximum balance outstanding at any month end during period	45,000	15,000	20,000
Weighted average interest rate for the period	0.25%	0.17%	0.24%
Weighted average interest rate for balances outstanding	0.25%	0.23%	0.25%
Federal Funds Purchased And Lines Of Credit [Member]
Short-term Debt [Line Items]
Balance	5,960	956	958
Average balance outstanding for the period	3,514	956	957
Maximum balance outstanding at any month end during period	$ 5,960	$ 956	$ 958
Weighted average interest rate for the period	0.25%	0.25%	0.25%
Weighted average interest rate for balances outstanding	0.25%	0.25%	0.25%

[1] December 31, 2012 financial information has been extracted from audited consolidated financial statements