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Condensed Financial Statements Of Parent Company (Condensed Balance Sheet Of Parent Company) (Details) - USD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Taxes receivable | $ 1,366 | $ 1,214 |
Other assets | 925 | 922 |
Total assets | 626,341 | 574,195 |
Capital notes | 5,000 |  |
Total liabilities | 574,676 | 524,774 |
Common stock $2.14 par value | 9,370 | 9,370 |
Additional paid-in-capital | 31,495 | 31,495 |
Retained earnings | 12,269 | 10,156 |
Accumulated other comprehensive (loss) | (1,469) | (1,600) |
Total stockholders' equity | 51,665 | 49,421 | $ 48,196
Total liabilities and stockholders' equity | $ 626,341 | $ 574,195 |
Common stock, par value | $ 2.14 | $ 2.14 |
Parent Company [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Cash | $ 859 | $ 281 |
Taxes receivable | 120 | 73 |
Investments in subsidiaries | 55,668 | 49,049 |
Other assets | 18 | 18 |
Total assets | 56,665 | 49,421 |
Capital notes | 5,000 |  |
Total liabilities | 5,000 |  |
Common stock $2.14 par value | 9,370 | 9,370 |
Additional paid-in-capital | 31,495 | 31,495 |
Retained earnings | 12,269 | 10,156 |
Accumulated other comprehensive (loss) | (1,469) | (1,600) |
Total stockholders' equity | 51,665 | 49,421 |
Total liabilities and stockholders' equity | $ 56,665 | $ 49,421 |
Common stock, par value | $ 2.14 | $ 2.14 |

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