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Loans And Allowance For Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | $ 4,505 | $ 3,350 |
Impaired loans, with no related allowance, Unpaid Principal Balance | 4,710 | 3,574 |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment | 2,204 | 2,389 |
Impaired loans, with related allowance, Unpaid Principal Balance | 4,279 | 4,464 |
Impaired loans, with related allowance, Related Allowance | 424 | 373 |
Impaired loans, Recorded Investment, Total | 6,709 | 5,739 |
Impaired loans, Unpaid Principal Balance, Total | 8,989 | 8,038 |
Impaired loans, with no related allowance, Average Recorded Investment | 4,696 | 4,497 | $ 4,272
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 246 | 121 | 98
Impaired loans, with related allowance, Average Recorded Investment | 2,078 | 2,661 | 960
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  | 1
Impaired loans, Average Recorded Investment, Total | 6,774 | 7,158 | 5,232
Impaired loans, Cash Basis Interest Income Recognized, Total | 246 | 121 | 99
Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | 2,831 | 1,692 |
Impaired loans, with no related allowance, Unpaid Principal Balance | 2,919 | 1,736 |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment | 1,650 | 531 |
Impaired loans, with related allowance, Unpaid Principal Balance | 3,575 | 531 |
Impaired loans, with related allowance, Related Allowance | 193 | 43 |
Impaired loans, with no related allowance, Average Recorded Investment | 2,768 | 2,663 | 1,589
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 157 | 60 | 66
Impaired loans, with related allowance, Average Recorded Investment | 1,619 | 532 | 572
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  |
Commercial And Industrial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | 130 | 202 |
Impaired loans, with no related allowance, Unpaid Principal Balance | 130 | 352 |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment | 217 | 224 |
Impaired loans, with related allowance, Unpaid Principal Balance | 367 | 374 |
Impaired loans, with related allowance, Related Allowance | 173 | 175 |
Impaired loans, with no related allowance, Average Recorded Investment | 239 | 346 | 537
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 4 | 10 | 4
Impaired loans, with related allowance, Average Recorded Investment | 118 | 227 | 376
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  |
Commercial Construction And Land Development [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment |  |  |
Impaired loans, with no related allowance, Unpaid Principal Balance |  |  |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment |  | 1,111 |
Impaired loans, with related allowance, Unpaid Principal Balance |  | 3,036 |
Impaired loans, with related allowance, Related Allowance |  | 58 |
Impaired loans, with no related allowance, Average Recorded Investment |  |  | 1,514
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized |  |  |
Impaired loans, with related allowance, Average Recorded Investment |  | 1,243 |
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  |
Agriculture And Other Loans To Farmers [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | 139 | 106 |
Impaired loans, with no related allowance, Unpaid Principal Balance | 139 | 106 |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment |  |  |
Impaired loans, with related allowance, Unpaid Principal Balance |  |  |
Impaired loans, with related allowance, Related Allowance |  |  |
Impaired loans, with no related allowance, Average Recorded Investment | 156 | 143 | 162
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 9 | 8 | 3
Impaired loans, with related allowance, Average Recorded Investment |  |  |
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  |
Residential Real Estate Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | 1,387 | 1,332 |
Impaired loans, with no related allowance, Unpaid Principal Balance | 1,504 | 1,362 |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment | 322 | 515 |
Impaired loans, with related allowance, Unpaid Principal Balance | 322 | 515 |
Impaired loans, with related allowance, Related Allowance | 49 | 97 |
Impaired loans, with no related allowance, Average Recorded Investment | 1,514 | 1,327 | 470
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 73 | 42 | 25
Impaired loans, with related allowance, Average Recorded Investment | 325 | 650 |
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  |
Home Equity Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | 16 | 18 |
Impaired loans, with no related allowance, Unpaid Principal Balance | 16 | 18 |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment |  |  |
Impaired loans, with related allowance, Unpaid Principal Balance |  |  |
Impaired loans, with related allowance, Related Allowance |  |  |
Impaired loans, with no related allowance, Average Recorded Investment | 17 | 18 |
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 1 |  |
Impaired loans, with related allowance, Average Recorded Investment |  |  |
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  |
Other Consumer [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired loans, with no related allowance, Recorded Investment | 2 |  |
Impaired loans, with no related allowance, Unpaid Principal Balance | 2 |  |
Impaired loans, with no related allowance, Related Allowance |  |  |
Impaired loans, with related allowance, Recorded Investment | 15 | 8 |
Impaired loans, with related allowance, Unpaid Principal Balance | 15 | 8 |
Impaired loans, with related allowance, Related Allowance | 9 |  |
Impaired loans, with no related allowance, Average Recorded Investment | 2 |  |
Impaired loans, with no related allowance, Cash Basis Interest Income Recognized | 2 | 1 |
Impaired loans, with related allowance, Average Recorded Investment | 16 | 9 | 12
Impaired loans, with related allowance, Cash Basis Interest Income Recognized |  |  | $ 1

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