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Loan Quality and Allowance for Loan Losses (Allowance For Loan Losses, By Loan Segment) (Details) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	[1]	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					$ 11,792				$ 11,075	$ 11,792	$ 11,075	$ 10,086
Charge-offs										(9,589)	(137)	(3,082)
Recoveries										258	184	296
Provision	$ 375	$ 250	$ 9,129		200	$ 250	$ 250	$ 50	120	9,954	670	3,775
Allowance, Ending Balance	12,415					11,792				12,415	11,792	11,075
Loans evaluated for allowance individually	11,140					11,906				11,140	11,906
Loans evaluated for allowance collectively	962,235					931,794				962,235	931,794
Total Loans	973,375					943,700				973,375	943,700
Allowance established for loan evaluated collectively	12,415					11,792				12,415	11,792
Total Allowance	12,415					11,792				12,415	11,792
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	196,120					208,805				196,120	208,805
Residential Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					224				224	224	224	194
Charge-offs												(41)
Provision										(116)		71
Allowance, Ending Balance	108					224				108	224	224
Loans evaluated for allowance individually	455					466				455	466
Loans evaluated for allowance collectively	9,770					9,435				9,770	9,435
Total Loans	10,225					9,901				10,225	9,901
Allowance established for loan evaluated collectively	108					224				108	224
Total Allowance	108					224				108	224
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					6,526				6,109	6,526	6,109	5,649
Charge-offs											(14)	(2,751)
Recoveries										60	17	19
Provision										(888)	414	3,192
Allowance, Ending Balance	5,698					6,526				5,698	6,526	6,109
Loans evaluated for allowance individually	10,099					10,981				10,099	10,981
Loans evaluated for allowance collectively	477,881					417,447				477,881	417,447
Total Loans	487,980					428,428				487,980	428,428
Allowance established for loan evaluated collectively	5,698					6,526				5,698	6,526
Total Allowance	5,698					6,526				5,698	6,526
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					2,110				1,893	2,110	1,893	1,519
Charge-offs										(9,482)	(8)	(74)
Recoveries										157	117	167
Provision										11,726	108	281
Allowance, Ending Balance	4,511					2,110				4,511	2,110	1,893
Loans evaluated for allowance individually	181									181
Loans evaluated for allowance collectively	273,873					291,519				273,873	291,519
Total Loans	274,054					291,519				274,054	291,519
Allowance established for loan evaluated collectively	4,511					2,110				4,511	2,110
Total Allowance	4,511					2,110				4,511	2,110
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					105				100	105	100	102
Charge-offs										(107)	(102)	(167)
Recoveries										31	37	75
Provision										41	70	90
Allowance, Ending Balance	70					105				70	105	100
Loans evaluated for allowance collectively	4,996					5,047				4,996	5,047
Total Loans	4,996					5,047				4,996	5,047
Allowance established for loan evaluated collectively	70					105				70	105
Total Allowance	70					105				70	105
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					1,437				1,321	1,437	1,321	1,325
Provision										(33)	116	(4)
Allowance, Ending Balance	1,404					1,437				1,404	1,437	1,321
Allowance established for loan evaluated collectively	1,404					1,437				1,404	1,437
Total Allowance	1,404					1,437				1,404	1,437
First Liens [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					1,060				1,105	1,060	1,105	989
Charge-offs											(13)	(49)
Recoveries										2	2	35
Provision										(571)	(34)	130
Allowance, Ending Balance	491					1,060				491	1,060	1,105
Loans evaluated for allowance individually	405					459				405	459
Loans evaluated for allowance collectively	148,495					157,975				148,495	157,975
Total Loans	148,900					158,434				148,900	158,434
Allowance established for loan evaluated collectively	491					1,060				491	1,060
Total Allowance	491					1,060				491	1,060
Junior Liens & Lines Of Credit [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance, Beginning Balance					$ 330				$ 323	330	323	308
Recoveries										8	11
Provision										(205)	(4)	15
Allowance, Ending Balance	133					330				133	330	$ 323
Loans evaluated for allowance collectively	47,220					50,371				47,220	50,371
Total Loans	47,220					50,371				47,220	50,371
Allowance established for loan evaluated collectively	133					330				133	330
Total Allowance	$ 133					$ 330				$ 133	$ 330
[1] Includes impairment charges on a loan participation

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A valuation allowance for financing receivables that are expected to be uncollectible.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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