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Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | $ 183,259 | $ 196,955
U.S. Government Agencies [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | 41,913 | 45,332
Mortgage-backed [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | 141,346 | 150,965
Equity [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | 651 | 658
Fair Value, Inputs, Level 2 [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | 183,259 | 196,955
Fair Value, Inputs, Level 2 [Member] | U.S. Government Agencies [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | 41,913 | 45,332
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | 141,346 | 150,965
Fair Value, Inputs, Level 2 [Member] | Equity [Member] |  |
Securities available for sale: |  |
Available-for-sale Securities, Fair Value Disclosure | $ 651 | $ 658

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