Allowance for Credit Losses (Allowance For Credit Losses And Recorded Investments In Loans Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 6,719	$ 6,145	$ 6,675	$ 5,843	$ 5,843
Charge-offs	(173)	(358)	(341)	(434)
Recoveries	26	26	38	29
Provisions	100	375	300	750
Ending balance	6,672	6,188	6,672	6,188	6,675
Ending balance: individually evaluated for impairment	161		161		285
Ending balance: collectively evaluated for impairment	6,511		6,511		6,390
Ending balance: Loans receivables	930,521		930,521		934,971
Ending Balance: individually evaluated for impairment	9,019		9,019		7,308
Ending Balance: collectively evaluated for impairment	920,981		920,981		927,149
Reserve for unfunded loan commitments included in other liabilities			420	408	398
Loans Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance: Loans receivables	521		521		514
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	156	226	161	221	221
Charge-offs		(103)		(137)	(151)
Recoveries		25	4	26
Provisions	(23)	59	(32)	97
Ending balance	133	207	133	207	161
Ending balance: individually evaluated for impairment					1
Ending balance: collectively evaluated for impairment	133		133		160
Ending balance: Loans receivables	98,802		98,802		99,932
Ending Balance: individually evaluated for impairment	2,759		2,759		1,535
Ending Balance: collectively evaluated for impairment	96,043		96,043		98,397
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,493	2,987	3,647	2,856	2,856
Charge-offs	(23)	(171)	(105)	(184)
Recoveries	7		7
Provisions	102	260	30	404
Ending balance	3,579	3,076	3,579	3,076	3,647
Ending balance: individually evaluated for impairment					78
Ending balance: collectively evaluated for impairment	3,579		3,579		3,569
Ending balance: Loans receivables	521,060		521,060		535,735
Ending Balance: individually evaluated for impairment	1,513		1,513		2,269
Ending Balance: collectively evaluated for impairment	519,026		519,026		532,952
Reserve for unfunded loan commitments included in other liabilities			2	3	4
Commercial Mortgage [Member] | Loans Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance: Loans receivables	521		521		514
Commercial Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,189	904	1,062	845	845
Charge-offs	(22)	(47)	(91)	(64)
Recoveries	19		27	2
Provisions	(42)	32	146	106
Ending balance	1,144	889	1,144	889	1,062
Ending balance: individually evaluated for impairment	161		161		203
Ending balance: collectively evaluated for impairment	983		983		859
Ending balance: Loans receivables	179,294		179,294		166,335
Ending Balance: individually evaluated for impairment	2,026		2,026		2,300
Ending Balance: collectively evaluated for impairment	177,268		177,268		164,035
Reserve for unfunded loan commitments included in other liabilities			189	183	167
Commercial Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,080	1,219	1,032	1,128	1,128
Charge-offs
Provisions	(48)	136		227
Ending balance	1,032	1,355	1,032	1,355	1,032
Ending balance: collectively evaluated for impairment	1,032		1,032		1,032
Ending balance: Loans receivables	77,060		77,060		76,302
Ending Balance: individually evaluated for impairment	2,274		2,274		476
Ending Balance: collectively evaluated for impairment	74,786		74,786		75,826
Reserve for unfunded loan commitments included in other liabilities			209	201	206
Consumer: Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	183	176	190	183	183
Charge-offs	(128)		(128)
Provisions	154	20	147	13
Ending balance	209	196	209	196	190
Ending balance: collectively evaluated for impairment	209		209		190
Ending balance: Loans receivables	49,492		49,492		51,536
Ending Balance: individually evaluated for impairment	279		279		531
Ending Balance: collectively evaluated for impairment	49,213		49,213		51,005
Reserve for unfunded loan commitments included in other liabilities			20	21	21
Consumer: Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	43	55	46	63	63
Charge-offs		(37)	(17)	(49)
Recoveries		1		1
Provisions	(4)	30	10	34
Ending balance	39	49	39	49	46
Ending balance: individually evaluated for impairment					3
Ending balance: collectively evaluated for impairment	39		39		43
Ending balance: Loans receivables	4,813		4,813		5,131
Ending Balance: individually evaluated for impairment	168		168		197
Ending Balance: collectively evaluated for impairment	4,645		4,645		4,934
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	575	578	537	547	547
Charge-offs
Provisions	(39)	(162)	(1)	(131)
Ending balance	536	$ 416	536	$ 416	537
Ending balance: collectively evaluated for impairment	$ 536		$ 536		$ 537