Loans and Allowance (Commercial and Retail Credit Exposure Credit Risk Profile by Internal Rating) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,186,713	$ 1,172,636	$ 1,083,395
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	318,684	302,577
Commercial Real Estate [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	309,451	295,548
Commercial Real Estate [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,219	3,705
Commercial Real Estate [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,996	3,297
Commercial Real Estate [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	18	27
Commercial Segment [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	457,126	445,766
Commercial Segment [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	10,003	6,472
Commercial Segment [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	10,780	3,868
Commercial Segment [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	18	27
Commercial Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	28,164	22,453
Commercial Segment [Member] | Construction Loans [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	27,464	21,782
Commercial Segment [Member] | Construction Loans [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		254
Commercial Segment [Member] | Construction Loans [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	700	417
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	131,079	131,103
Commercial Segment [Member] | Commercial and Industrial [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	120,211	128,436
Commercial Segment [Member] | Commercial and Industrial [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	5,784	2,513
Commercial Segment [Member] | Commercial and Industrial [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,084	154
Consumer [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	702,990	710,182
Consumer [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,796	6,321
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	444,243	478,848
Consumer [Member] | First Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	439,075	473,329
Consumer [Member] | First Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,168	5,519
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	69,477	71,222
Consumer [Member] | Second Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	69,130	70,769
Consumer [Member] | Second Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	347	453
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	19,640	18,939
Consumer [Member] | Automobile Loan [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	19,616	18,931
Consumer [Member] | Automobile Loan [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	24	8
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	169,238	141,602
Consumer [Member] | Boat/RVs [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	169,036	141,294
Consumer [Member] | Boat/RVs [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	202	308
Consumer [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,188	5,892
Consumer [Member] | Other [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	6,133	5,859
Consumer [Member] | Other [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 55	$ 33