Loans (Commercial and Retail Credit Exposure Credit Risk Profile by Internal Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,196,829	$ 1,172,636	$ 1,139,947
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	306,566	302,577
Commercial Real Estate [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	296,922	295,548
Commercial Real Estate [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	6,692	3,705
Commercial Real Estate [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	2,931	3,297
Commercial Real Estate [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	21	27
Commercial Segment [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	444,435	445,766
Commercial Segment [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	18,545	6,472
Commercial Segment [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	3,860	3,868
Commercial Segment [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	21	27
Commercial Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	22,888	22,453
Commercial Segment [Member] | Construction Loans [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	21,750	21,782
Commercial Segment [Member] | Construction Loans [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	404	254
Commercial Segment [Member] | Construction Loans [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	734	417
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	137,407	131,103
Commercial Segment [Member] | Commercial and Industrial [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	125,763	128,436
Commercial Segment [Member] | Commercial and Industrial [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	11,449	2,513
Commercial Segment [Member] | Commercial and Industrial [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	195	154
Consumer [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	724,506	710,182
Consumer [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,462	6,321
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	466,759	478,848
Consumer [Member] | First Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	461,949	473,329
Consumer [Member] | First Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,810	5,519
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	70,395	71,222
Consumer [Member] | Second Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	70,107	70,769
Consumer [Member] | Second Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	288	453
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	19,360	18,939
Consumer [Member] | Automobile Loan [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	19,345	18,931
Consumer [Member] | Automobile Loan [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	15	8
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	167,484	141,602
Consumer [Member] | Boat/RVs [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	167,181	141,294
Consumer [Member] | Boat/RVs [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	303	308
Consumer [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,970	5,892
Consumer [Member] | Other [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	5,924	5,859
Consumer [Member] | Other [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 46	$ 33