Loans Receivable And Credit Quality (Activity In Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 7,266	$ 6,619	$ 7,040	$ 6,517
Charge-offs	(63)	(93)	(63)	(184)
Recoveries	5		16	13
Provision for loan losses	265	235	480	415
Ending balance	7,473	6,761	7,473	6,761
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,456	2,353	2,251	2,349
Recoveries	1		8	13
Provision for loan losses	(76)	(199)	122	(208)
Ending balance	2,381	2,154	2,381	2,154
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	475	363	472	423
Charge-offs	(40)	(93)	(40)	(122)
Provision for loan losses	(15)	223	(12)	192
Ending balance	420	493	420	493
Commercial [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	249	670	369	516
Provision for loan losses	(91)	(197)	(211)	(43)
Ending balance	158	473	158	473
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,508	2,968	3,510	2,937
Charge-offs	(23)		(23)	(62)
Recoveries	4		8
Provision for loan losses	304	402	298	495
Ending balance	3,793	3,370	3,793	3,370
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	22	16	18	15
Provision for loan losses	5	11	9	12
Ending balance	27	27	27	27
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	556	249	420	277
Provision for loan losses	138	(5)	274	(33)
Ending balance	$ 694	$ 244	$ 694	$ 244