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Fair Value Measurements (Financial Assets And Financial Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
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US Government-Sponsored Enterprises [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | $ 332,980 | $ 306,993
US Government-Sponsored Enterprises [Member] | Level 2 Inputs [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 332,980 | 306,993
US Government Agencies [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 82,368 | 79,130
US Government Agencies [Member] | Level 2 Inputs [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 82,368 | 79,130
Private Label [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 1,327 | 3,464
Private Label [Member] | Level 2 Inputs [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 1,327 | 3,464
Obligations Of States And Political Subdivisions Thereof [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 115,915 | 115,382
Obligations Of States And Political Subdivisions Thereof [Member] | Level 2 Inputs [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 115,915 | 115,382
Derivative Assets [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | 842 | 2,069
Derivative Assets [Member] | Level 2 Inputs [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets, at fair value on a recurring basis | $ 842 | $ 2,069

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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