Loans and Allowance (Age Analysis of Past Due Loans Segregated by Class of Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 15,041	$ 28,022
Current	1,481,166	1,469,234
Total loans receivable	1,496,207	1,497,256	$ 1,467,746
Total Loans > 90 Days or More and Accruing		517
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,254	17,091
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,060	3,023
90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,727	7,908
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,408	6,058
Current	495,584	479,750
Total loans receivable	498,992	485,808
Commercial Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,906	1,145
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	21	536
Commercial Real Estate [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	481	4,377
Commercial Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	136	4,694
Current	58,936	48,616
Total loans receivable	59,072	53,310
Commercial Segment [Member] | Construction Loans [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	136	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	1,449	801
Current	155,501	148,558
Total loans receivable	156,950	149,359
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	1,000	617
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	199	93
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	250	91
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,449	12,205
Current	415,110	452,334
Total loans receivable	421,559	464,539
Total Loans > 90 Days or More and Accruing		517
Consumer [Member] | First Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,076	7,847
Consumer [Member] | First Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,069	1,662
Consumer [Member] | First Mortgage [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,304	2,696
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	625	687
Current	74,593	76,385
Total loans receivable	75,218	77,072
Consumer [Member] | Second Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	358	353
Consumer [Member] | Second Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	157	114
Consumer [Member] | Second Mortgage [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	110	220
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	450	345
Current	56,405	43,322
Total loans receivable	56,855	43,667
Consumer [Member] | Automobile Loan [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	289	257
Consumer [Member] | Automobile Loan [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	120	16
Consumer [Member] | Automobile Loan [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	41	72
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,433	3,118
Current	218,037	213,490
Total loans receivable	220,470	216,608
Consumer [Member] | Boat/RVs [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,429	2,174
Consumer [Member] | Boat/RVs [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	483	594
Consumer [Member] | Boat/RVs [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	521	350
Consumer [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	91	114
Current	7,000	6,779
Total loans receivable	7,091	6,893
Consumer [Member] | Other [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	60	65
Consumer [Member] | Other [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11	8
Consumer [Member] | Other [Member] | 90 Days Past Due or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 20	$ 41