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Allowance For Loan Losses (Impaired Loans By Class) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Unpaid Principal Balance [Abstract]      
Total: $ 11,895 $ 11,895 $ 14,341
Recorded Investment [Abstract]      
Total: 11,185 11,185 13,400
Related Allowance 271 271 385
Average Recorded Investment [Abstract]      
Total: 11,300 11,339 13,719
Interest Income Recognized [Abstract]      
Total: 75 143 415
Consumer Installment      
Unpaid Principal Balance [Abstract]      
Total: 17 17 8
Recorded Investment [Abstract]      
Total: 16 16 8
Related Allowance 0 0 0
Average Recorded Investment [Abstract]      
Total:   17 9
Interest Income Recognized [Abstract]      
Total:   0 0
Commercial      
Unpaid Principal Balance [Abstract]      
Total: 525 525 594
Recorded Investment [Abstract]      
Total: 504 504 582
Related Allowance 2 2 15
Average Recorded Investment [Abstract]      
Total:   542 654
Interest Income Recognized [Abstract]      
Total:   13 35
Commercial Real Estate      
Unpaid Principal Balance [Abstract]      
Total: 1,895 1,895 3,194
Recorded Investment [Abstract]      
Total: 1,751 1,751 2,867
Related Allowance 64 64 102
Average Recorded Investment [Abstract]      
Total:   1,759 2,954
Interest Income Recognized [Abstract]      
Total:   25 75
Construction and Farmland      
Unpaid Principal Balance [Abstract]      
Total: 331 331 1,320
Recorded Investment [Abstract]      
Total: 331 331 1,324
Related Allowance 0 0 0
Average Recorded Investment [Abstract]      
Total:   338 1,358
Interest Income Recognized [Abstract]      
Total:   14 75
Residential Real Estate      
Unpaid Principal Balance [Abstract]      
Total: 9,127 9,127 9,225
Recorded Investment [Abstract]      
Total: 8,583 8,583 8,619
Related Allowance 205 205 268
Average Recorded Investment [Abstract]      
Total:   8,683 8,744
Interest Income Recognized [Abstract]      
Total:   91 230
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: 9,195 9,195 10,895
Recorded Investment [Abstract]      
With no related allowance: 8,661 8,661 10,335
Average Recorded Investment [Abstract]      
With no related allowance:   8,793 10,586
Interest Income Recognized [Abstract]      
With no related allowance:   88 294
With No Related Allowance [Member] | Commercial - Non Real Estate Commercial And Industrial      
Unpaid Principal Balance [Abstract]      
With no related allowance: 258 258 311
Recorded Investment [Abstract]      
With no related allowance: 237 237 299
Average Recorded Investment [Abstract]      
With no related allowance:   266 356
Interest Income Recognized [Abstract]      
With no related allowance:   7 21
With No Related Allowance [Member] | Commercial Real Estate Owner Occupied      
Unpaid Principal Balance [Abstract]      
With no related allowance: 865 865 869
Recorded Investment [Abstract]      
With no related allowance: 750 750 772
Average Recorded Investment [Abstract]      
With no related allowance:   753 778
Interest Income Recognized [Abstract]      
With no related allowance:   7 15
With No Related Allowance [Member] | Commercial Real Estate Non-Owner Occupied      
Unpaid Principal Balance [Abstract]      
With no related allowance: 215 215 1,298
Recorded Investment [Abstract]      
With no related allowance: 184 184 1,066
Average Recorded Investment [Abstract]      
With no related allowance:   185 1,137
Interest Income Recognized [Abstract]      
With no related allowance:   0 13
With No Related Allowance [Member] | Construction And Farmland Commercial      
Unpaid Principal Balance [Abstract]      
With no related allowance: 331 331 1,320
Recorded Investment [Abstract]      
With no related allowance: 331 331 1,324
Average Recorded Investment [Abstract]      
With no related allowance:   338 1,358
Interest Income Recognized [Abstract]      
With no related allowance:   14 75
With No Related Allowance [Member] | Consumer Installment      
Unpaid Principal Balance [Abstract]      
With no related allowance: 17 17 8
Recorded Investment [Abstract]      
With no related allowance: 16 16 8
Average Recorded Investment [Abstract]      
With no related allowance:   17 9
Interest Income Recognized [Abstract]      
With no related allowance:   0 0
With No Related Allowance [Member] | Residential Equity Lines      
Unpaid Principal Balance [Abstract]      
With no related allowance: 236 236 17
Recorded Investment [Abstract]      
With no related allowance: 60 60 17
Average Recorded Investment [Abstract]      
With no related allowance:   62 18
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: 7,273 7,273 7,072
Recorded Investment [Abstract]      
With no related allowance: 7,083 7,083 6,849
Average Recorded Investment [Abstract]      
With no related allowance:   7,172 6,930
Interest Income Recognized [Abstract]      
With no related allowance:   60 170
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: 2,700 2,700 3,446
Recorded Investment [Abstract]      
With an allowance recorded: 2,524 2,524 3,065
Related Allowance 271 271 385
Average Recorded Investment [Abstract]      
With an allowance recorded:   2,546 3,133
Interest Income Recognized [Abstract]      
With an allowance recorded:   55 121
With An Allowance Recorded [Member] | Commercial - Non Real Estate Commercial And Industrial      
Unpaid Principal Balance [Abstract]      
With an allowance recorded: 267 267 283
Recorded Investment [Abstract]      
With an allowance recorded: 267 267 283
Related Allowance 2 2 15
Average Recorded Investment [Abstract]      
With an allowance recorded:   276 298
Interest Income Recognized [Abstract]      
With an allowance recorded:   6 14
With An Allowance Recorded [Member] | Commercial Real Estate Owner Occupied      
Unpaid Principal Balance [Abstract]      
With an allowance recorded:     203
Recorded Investment [Abstract]      
With an allowance recorded:     203
Related Allowance     37
Average Recorded Investment [Abstract]      
With an allowance recorded:     205
Interest Income Recognized [Abstract]      
With an allowance recorded:     10
With An Allowance Recorded [Member] | Commercial Real Estate Non-Owner Occupied      
Unpaid Principal Balance [Abstract]      
With an allowance recorded: 815 815 824
Recorded Investment [Abstract]      
With an allowance recorded: 817 817 826
Related Allowance 64 64 65
Average Recorded Investment [Abstract]      
With an allowance recorded:   821 834
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] | Residential Equity Lines      
Unpaid Principal Balance [Abstract]      
With an allowance recorded: 218 218 458
Recorded Investment [Abstract]      
With an allowance recorded: 48 48 115
Related Allowance 48 48 56
Average Recorded Investment [Abstract]      
With an allowance recorded:   48 120
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: 1,400 1,400 1,678
Recorded Investment [Abstract]      
With an allowance recorded: 1,392 1,392 1,638
Related Allowance 157 157 212
Average Recorded Investment [Abstract]      
With an allowance recorded:   1,401 1,676
Interest Income Recognized [Abstract]      
With an allowance recorded:   31 60
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