Loans and Allowance (Age Analysis of Past Due Loans Segregated by Class of Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 28,022	$ 20,618
Current	1,469,234	1,166,095
Total loans receivable	1,497,256	1,186,713	$ 1,172,636
Total Loans > 90 Days or More and Accruing	517	31
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	17,091	10,693
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,023	5,164
90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,908	4,761
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,058	6,480
Current	479,750	312,204
Total loans receivable	485,808	318,684
Commercial Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,145	2,171
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	536	3,311
Commercial Real Estate [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,377	998
Commercial Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,694
Current	48,616	28,164
Total loans receivable	53,310	28,164
Commercial Segment [Member] | Construction Loans [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,633
Commercial Segment [Member] | Construction Loans [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	61
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	801	445
Current	148,558	130,634
Total loans receivable	149,359	131,079
Commercial Segment [Member] | Commercial and Industrial [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	617	276
Commercial Segment [Member] | Commercial and Industrial [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	93	10
Commercial Segment [Member] | Commercial and Industrial [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	91	159
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12,205	10,478
Current	452,334	433,765
Total loans receivable	464,539	444,243
Total Loans > 90 Days or More and Accruing	517	31
Consumer [Member] | First Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,847	5,914
Consumer [Member] | First Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,662	1,340
Consumer [Member] | First Mortgage [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,696	3,224
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	687	927
Current	76,385	68,550
Total loans receivable	77,072	69,477
Consumer [Member] | Second Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	353	540
Consumer [Member] | Second Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	114	123
Consumer [Member] | Second Mortgage [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	220	264
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	345	139
Current	43,322	19,501
Total loans receivable	43,667	19,640
Consumer [Member] | Automobile Loan [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	257	114
Consumer [Member] | Automobile Loan [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16	24
Consumer [Member] | Automobile Loan [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	72	1
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,118	2,054
Current	213,490	167,184
Total loans receivable	216,608	169,238
Consumer [Member] | Boat/RVs [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,174	1,613
Consumer [Member] | Boat/RVs [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	594	338
Consumer [Member] | Boat/RVs [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	350	103
Consumer [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	114	95
Current	6,779	6,093
Total loans receivable	6,893	6,188
Consumer [Member] | Other [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	65	65
Consumer [Member] | Other [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8	18
Consumer [Member] | Other [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 41	$ 12