| **Fair Values of Assets and Liabilities (Measured on Recurring Basis) (Details) - USD ($) $ in Thousands** | Jun. 30, 2016 | Dec. 31, 2015 |
|------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | $ 377,646     | $ 390,434     | [1] |
| U.S. Government-sponsored agencies [Member]                                                                |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      |          | 2,008         |  |
| Residential mortgage-backed securities - GSE [Member]                                                      |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 270,995       | 278,107       |  |
| Residential mortgage-backed securities - Private [Member]                                                  |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 28,984        | 33,577        |  |
| Commercial mortgage-backed securities - GSE [Member]                                                       |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 22,167        | 21,612        |  |
| Commercial mortgage-backed securities - Private [Member]                                                   |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 18,081        | 17,575        |  |
| Corporate notes [Member]                                                                                   |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 37,419        | 37,555        |  |
| Level 1 [Member]                                                                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Level 1 [Member] | Interest Rate Swap [Member]                                                             |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | 0             |          |  |
| Level 2 [Member]                                                                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 377,646       | 390,434       |  |
| Level 2 [Member] | Interest Rate Swap [Member]                                                             |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | (1,847)       |          |  |
| Level 3 [Member]                                                                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Level 3 [Member] | Interest Rate Swap [Member]                                                             |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | 0             |          |  |
| Recurring [Member]                                                                                         |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 377,646       | 390,433       |  |
| Mortgage servicing rights                                                                                  | 2,812         | 2,231         |  |
| Total assets at fair value                                                                                 | 378,611       | 391,909       |  |
| Recurring [Member] | Interest Rate Swap [Member]                                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | (1,847)       | (755)         |  |
| Recurring [Member] | U.S. Government-sponsored agencies [Member]                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 2,008         |  |
| Recurring [Member] | Residential mortgage-backed securities - GSE [Member]                                 |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 270,995       | 278,107       |  |
| Recurring [Member] | Residential mortgage-backed securities - Private [Member]                             |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 28,984        | 33,577        |  |
| Recurring [Member] | Commercial mortgage-backed securities - GSE [Member]                                  |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 22,167        | 21,611        |  |
| Recurring [Member] | Commercial mortgage-backed securities - Private [Member]                              |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 18,081        | 17,575        |  |
| Recurring [Member] | Corporate notes [Member]                                                              |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 37,419        | 37,555        |  |
| Recurring [Member] | Level 1 [Member]                                                                      |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Mortgage servicing rights                                                                                  | 0             | 0             |  |
| Total assets at fair value                                                                                 | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | Interest Rate Swap [Member]                                        |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | U.S. Government-sponsored agencies [Member]                        |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | Residential mortgage-backed securities - GSE [Member]              |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | Residential mortgage-backed securities - Private [Member]          |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | Commercial mortgage-backed securities - GSE [Member]               |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | Commercial mortgage-backed securities - Private [Member]           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 1 [Member] | Corporate notes [Member]                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 2 [Member]                                                                      |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 377,646       | 390,433       |  |
| Mortgage servicing rights                                                                                  | 0             | 0             |  |
| Total assets at fair value                                                                                 | 375,799       | 389,678       |  |
| Recurring [Member] | Level 2 [Member] | Interest Rate Swap [Member]                                        |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | (1,847)       | (755)         |  |
| Recurring [Member] | Level 2 [Member] | U.S. Government-sponsored agencies [Member]                        |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 2,008         |  |
| Recurring [Member] | Level 2 [Member] | Residential mortgage-backed securities - GSE [Member]              |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 270,995       | 278,107       |  |
| Recurring [Member] | Level 2 [Member] | Residential mortgage-backed securities - Private [Member]          |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 28,984        | 33,577        |  |
| Recurring [Member] | Level 2 [Member] | Commercial mortgage-backed securities - GSE [Member]               |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 22,167        | 21,611        |  |
| Recurring [Member] | Level 2 [Member] | Commercial mortgage-backed securities - Private [Member]           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 18,081        | 17,575        |  |
| Recurring [Member] | Level 2 [Member] | Corporate notes [Member]                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 37,419        | 37,555        |  |
| Recurring [Member] | Level 3 [Member]                                                                      |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Mortgage servicing rights                                                                                  | 2,812         | 2,231         |  |
| Total assets at fair value                                                                                 | 2,812         | 2,231         |  |
| Recurring [Member] | Level 3 [Member] | Interest Rate Swap [Member]                                        |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Interest rate swaps                                                                                        | 0             | 0             |  |
| Recurring [Member] | Level 3 [Member] | U.S. Government-sponsored agencies [Member]                        |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 3 [Member] | Residential mortgage-backed securities - GSE [Member]              |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 3 [Member] | Residential mortgage-backed securities - Private [Member]          |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 3 [Member] | Commercial mortgage-backed securities - GSE [Member]               |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 3 [Member] | Commercial mortgage-backed securities - Private [Member]           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | 0             | 0             |  |
| Recurring [Member] | Level 3 [Member] | Corporate notes [Member]                                           |          |          |  |
| **Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]**                            |          |          |  |
| Total                                                                                                      | $ 0           | $ 0           |  |
|                                                                                                            |
| [1]Derived from audited consolidated financial statements                                                  |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
+ References
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| - Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.
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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.
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| - Definition
Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.
+ References
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