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Parent Company Financial Information (Condensed Statements Of Condition) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Other assets | $ 64,029 | $ 63,248 |  |
Total assets | 3,710,340 | 3,381,024 |  |
Long-term borrowings, net of issuance costs of $939 and $1,010, respectively | 39,061 | 38,990 |  |
Other liabilities | 24,503 | 24,559 |  |
Shareholders' equity | 320,054 | 293,844 | $ 279,532 | $ 254,839
Total liabilities and shareholders' equity | 3,710,340 | 3,381,024 |  |
Debt issuance costs | 939 | 1,010 |  |
Parent Company [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and due from subsidiary | 16,516 | 15,787 |  |
Investment in and receivables due from subsidiary | 344,741 | 318,928 |  |
Other assets | 4,020 | 4,451 |  |
Total assets | 365,277 | 339,166 |  |
Long-term borrowings, net of issuance costs of $939 and $1,010, respectively | 39,061 | 38,990 |  |
Other liabilities | 6,162 | 6,332 |  |
Shareholders' equity | 320,054 | 293,844 |  |
Total liabilities and shareholders' equity | 365,277 | 339,166 |  |
Debt issuance costs | $ 939 | $ 1,010 |  |

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