Loans and Allowance (Commercial and Retail Credit Exposure Credit Risk Profile by Internal Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,478,122	$ 1,186,713	$ 1,196,829
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	490,150	318,684
Commercial Real Estate [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	470,621	309,451
Commercial Real Estate [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	8,018	4,219
Commercial Real Estate [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	11,511	4,996
Commercial Real Estate [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans		18
Commercial Segment [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	646,771	457,126
Commercial Segment [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	15,410	10,003
Commercial Segment [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	16,248	10,780
Commercial Segment [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans		18
Commercial Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	42,854	28,164
Commercial Segment [Member] | Construction Loans [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	42,165	27,464
Commercial Segment [Member] | Construction Loans [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	82
Commercial Segment [Member] | Construction Loans [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	607	700
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	145,425	131,079
Commercial Segment [Member] | Commercial and Industrial [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	133,985	120,211
Commercial Segment [Member] | Commercial and Industrial [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	7,310	5,784
Commercial Segment [Member] | Commercial and Industrial [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,130	5,084
Consumer [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	794,265	702,990
Consumer [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,428	5,796
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	470,418	444,243
Consumer [Member] | First Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	466,124	439,075
Consumer [Member] | First Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,294	5,168
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	76,843	69,477
Consumer [Member] | Second Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	76,605	69,130
Consumer [Member] | Second Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	238	347
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	33,050	19,640
Consumer [Member] | Automobile Loan [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	32,999	19,616
Consumer [Member] | Automobile Loan [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	51	24
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	212,679	169,238
Consumer [Member] | Boat/RVs [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	211,904	169,036
Consumer [Member] | Boat/RVs [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	775	202
Consumer [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,703	6,188
Consumer [Member] | Other [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	6,633	6,133
Consumer [Member] | Other [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 70	$ 55