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Loans and Allowance for Loan Losses (Impaired Loans By Class) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | $ 6,916 | $ 6,916 |  | $ 12,495
Recorded Investment [Abstract] |  |  |  |
Total: | 5,970 | 5,970 |  | 11,445
Related Allowance | 219 | 219 |  | 458
Average Recorded Investment [Abstract] |  |  |  |
Total: | 6,400 | 6,428 |  | 11,642
Interest Income Recognized [Abstract] |  |  |  |
Total: | 62 | 129 |  | 322
Consumer Installment |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | 1 | 1 |  | 34
Recorded Investment [Abstract] |  |  |  |
Total: | 1 | 1 |  | 34
Related Allowance | 0 | 0 |  | 9
Average Recorded Investment [Abstract] |  |  |  |
Total: |  | 2 |  | 36
Interest Income Recognized [Abstract] |  |  |  |
Total: |  | 0 |  | 1
Commercial |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | 604 | 604 |  | 1,221
Recorded Investment [Abstract] |  |  |  |
Total: | 384 | 384 |  | 860
Related Allowance | 0 | 0 |  | 195
Average Recorded Investment [Abstract] |  |  |  |
Total: |  | 601 |  | 909
Interest Income Recognized [Abstract] |  |  |  |
Total: |  | 13 |  | 40
Commercial Real Estate |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | 1,227 | 1,227 |  | 1,941
Recorded Investment [Abstract] |  |  |  |
Total: | 1,182 | 1,182 |  | 1,907
Related Allowance | 57 | 57 |  | 59
Average Recorded Investment [Abstract] |  |  |  |
Total: |  | 1,230 |  | 1,938
Interest Income Recognized [Abstract] |  |  |  |
Total: |  | 18 |  | 72
Construction and Farmland |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | 347 | 347 |  | 362
Recorded Investment [Abstract] |  |  |  |
Total: | 298 | 298 |  | 316
Related Allowance | 0 | 0 |  | 0
Average Recorded Investment [Abstract] |  |  |  |
Total: |  | 347 |  | 330
Interest Income Recognized [Abstract] |  |  |  |
Total: |  | 14 |  | 28
Residential Real Estate |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | 4,737 | 4,737 |  | 8,937
Recorded Investment [Abstract] |  |  |  |
Total: | 4,105 | 4,105 |  | 8,328
Related Allowance | 162 | 162 |  | 195
Average Recorded Investment [Abstract] |  |  |  |
Total: |  | 4,248 |  | 8,429
Interest Income Recognized [Abstract] |  |  |  |
Total: |  | 84 |  | 181
All Other Loans |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
Total: | 0 | 0 |  | 0
Recorded Investment [Abstract] |  |  |  |
Total: | 0 | 0 |  | 0
Related Allowance | 0 | 0 |  | 0
Average Recorded Investment [Abstract] |  |  |  |
Total: |  | 0 |  | 0
Interest Income Recognized [Abstract] |  |  |  |
Total: |  | 0 |  | 0
With No Related Allowance [Member] |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 4,647 | 4,647 |  | 9,519
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 3,928 | 3,928 |  | 8,728
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 4,337 |  | 8,889
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 83 |  | 211
With No Related Allowance [Member] | Commercial - Non Real Estate Commercial And Industrial |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 604 | 604 |  | 626
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 384 | 384 |  | 304
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 601 |  | 342
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 13 |  | 23
With No Related Allowance [Member] | Commercial Real Estate Owner Occupied |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 0 | 0 |  | 330
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 0 | 0 |  | 331
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 336
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 15
With No Related Allowance [Member] | Commercial Real Estate Non-Owner Occupied |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 430 | 430 |  | 805
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 383 | 383 |  | 767
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 426 |  | 785
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 20
With No Related Allowance [Member] | Construction And Farmland Commercial |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 347 | 347 |  | 362
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 298 | 298 |  | 316
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 347 |  | 330
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 14 |  | 28
With No Related Allowance [Member] | Consumer Installment |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 1 | 1 |  | 25
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 1 | 1 |  | 25
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 2 |  | 27
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 1
With No Related Allowance [Member] | Residential Equity Lines |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 234 | 234 |  | 0
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 48 | 48 |  | 0
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 48 |  | 0
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 0
With No Related Allowance [Member] | Residential Single Family |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 3,031 | 3,031 |  | 7,371
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 2,814 | 2,814 |  | 6,985
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 2,913 |  | 7,069
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 56 |  | 124
With No Related Allowance [Member] | All Other Loans |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With no related allowance: | 0 | 0 |  | 0
Recorded Investment [Abstract] |  |  |  |
With no related allowance: | 0 | 0 |  | 0
Average Recorded Investment [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 0
Interest Income Recognized [Abstract] |  |  |  |
With no related allowance: |  | 0 |  | 0
With An Allowance Recorded [Member] |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 2,269 | 2,269 |  | 2,976
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 2,042 | 2,042 |  | 2,717
Related Allowance | 219 | 219 |  | 458
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 2,091 |  | 2,753
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 46 |  | 111
With An Allowance Recorded [Member] | Commercial - Non Real Estate Commercial And Industrial |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 595
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 556
Related Allowance | 0 | 0 |  | 195
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 0 |  | 567
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 0 |  | 17
With An Allowance Recorded [Member] | Commercial Real Estate Non-Owner Occupied |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 797 | 797 |  | 806
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 799 | 799 |  | 809
Related Allowance | 57 | 57 |  | 59
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 804 |  | 817
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 18 |  | 37
With An Allowance Recorded [Member] | Construction And Farmland Commercial |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 0
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 0
Related Allowance | 0 | 0 |  | 0
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 0 |  | 0
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 0 |  | 0
With An Allowance Recorded [Member] | Consumer Installment |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 9
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 9
Related Allowance | 0 | 0 |  | 9
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 0 | $ 9 |
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 0 | $ 0 |
With An Allowance Recorded [Member] | Residential Equity Lines |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 217 | 217 |  | 217
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 41 | 41 |  | 44
Related Allowance | 41 | 41 |  | 44
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 41 |  | 45
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 0 |  | 0
With An Allowance Recorded [Member] | Residential Single Family |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 1,255 | 1,255 |  | 1,349
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 1,202 | 1,202 |  | 1,299
Related Allowance | 121 | 121 |  | 151
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 1,246 |  | 1,315
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | 28 |  | 57
With An Allowance Recorded [Member] | All Other Loans |  |  |  |
Unpaid Principal Balance [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 0
Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: | 0 | 0 |  | 0
Related Allowance | $ 0 | 0 |  | 0
Average Recorded Investment [Abstract] |  |  |  |
With an allowance recorded: |  | 0 |  | 0
Interest Income Recognized [Abstract] |  |  |  |
With an allowance recorded: |  | $ 0 |  | $ 0

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