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Troubled Debt Restructurings (Narrative) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 USD ($) contract | Sep. 30, 2015 contract | Sep. 30, 2016 USD ($) contract | Sep. 30, 2015 contract | Dec. 31, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Number of troubled debt restructured loans |  |  | 27 |  | 24
Loan is considered payment default |  |  | 30 days |  |
Financing Receivable, Modifications, Nonaccrual, Number of Contracts | 5 |  | 5 |  | 2
Financing Receivable, Modifications, Nonaccrual, Recorded Investment | $ | $ 1,340 |  | $ 1,340 |  | $ 526
Troubled Debt Restructuring Modifications Number Of Contracts | 2 | 1 | 4 | 2 |
Total troubled debt restructured loans | $ | $ 7,700 |  | $ 7,700 |  | $ 7,500
Residential Single Family |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Troubled Debt Restructuring Modifications Number Of Contracts | 2 | 1 | 3 | 2 |
Trouble Debt Restructuring Modifications Payment Reduction Number of Contracts |  | 2 |  |  |
Troubled Debt Restructuring Modifications Amortization Period Number of Contracts |  | 1 | 1 | 1 |
Residential Single Family and Commercial Real Estate Non Owner Occupied [Member] |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Troubled Debt Restructuring Modifications Number Of Contracts |  |  | 2 |  |
Commercial Real Estate Non-Owner Occupied |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Troubled Debt Restructuring Modifications Number Of Contracts |  |  | 1 |  |
Troubled Debt Restructuring Modifications Amortization Period Number of Contracts |  |  | 1 |  |

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