Loans (Schedule Of Loans Outstanding) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 802,568	$ 782,016
Less: Allowance for loan losses	(10,342)	(10,086)	$ (9,210)	$ (9,111)
Net Loans	792,226	771,930
Change Amount	$ 20,552
Change %	2.60%
Allowance for loan losses, Change Amount	$ (256)
Allowance for loan losses, Change %	2.50%
Net Loans, Change Amount	$ 20,296
Net Loans, Change %	2.60%
Net unamortized deferred loan costs (fees)	$ 547	436
Loans pledged as collateral for borrowings and commitments from: FHLB	665,635	643,449
Loans pledged as collateral for borrowings and commitments from :Federal Reserve Bank	42,932	45,111
Total loans pledged as collateral	708,567	688,560
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	214,221	212,391
Change Amount	$ 1,830
Change %	0.90%
Residential Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 8,107	7,888
Less: Allowance for loan losses	(199)	(194)	(249)	(214)
Change Amount	$ 219
Change %	2.80%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 359,642	340,695
Less: Allowance for loan losses	(6,181)	(5,649)	(5,137)	(4,978)
Change Amount	$ 18,947
Change %	5.60%
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 215,671	215,942
Less: Allowance for loan losses	(1,510)	(1,519)	(1,352)	(1,515)
Change Amount	$ (271)
Change %	(0.10%)
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 575,313	556,637
Change Amount	$ 18,676
Change %	3.40%
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 4,927	5,100
Less: Allowance for loan losses	(99)	(102)	(117)	(127)
Change Amount	$ (173)
Change %	(3.40%)
Consumer First Liens [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 101,412	103,698
Change Amount	$ (2,286)
Change %	(2.20%)
Consumer Junior Liens And Lines Of Credit [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 46,479	44,996
Change Amount	$ 1,483
Change %	3.30%
Consumer [Member] | Residential Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 514	545
Change Amount	$ (31)
Change %	(5.70%)
Commercial Junior Liens And Lines Of Credit [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,936	5,917
Change Amount	$ 19
Change %	0.30%
Commercial [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 60,394	57,780
Change Amount	$ 2,614
Change %	4.50%
Commercial [Member] | Residential Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 7,593	7,343
Change Amount	$ 250
Change %	3.40%
First Liens [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 161,806	161,478
Less: Allowance for loan losses	(997)	(989)	$ (1,016)	$ (994)
Change Amount	$ 328
Change %	0.20%
Junior Lines And Lines Of Credit [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 52,415	$ 50,913
Change Amount	$ 1,502
Change %	3.00%