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Loans and Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings | $ 2,673 | $ 990 |
Total nonaccrual loans, including nonaccruing TDRs | 7,301 | 5,482 |
Other real estate owned | 242 | 639 | $ 2,475
Total nonperforming assets | $ 7,543 | $ 6,121 |
Nonperforming assets as a percentage of: |  |  |
Total assets | 0.46% | 0.46% |
Gross loans | 0.54% | 0.53% |
Total loans over 90 days past due | $ 2,027 | $ 1,984 |
Loans over 90 days past due and still accruing |  |  |
Accruing TDRs | 5,145 | 5,675 |
Commercial [Member] | Construction [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings |  |  |
Commercial [Member] | Owner occupied RE [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings |  | 276 |
Commercial [Member] | Non-owner occupied RE [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings | 1,581 | 2,711 |
Commercial [Member] | Business [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings | 910 | 686 |
Consumer [Member] | Real estate [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings | 992 | 550 |
Consumer [Member] | Home equity [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings | 1,144 | 256 |
Consumer [Member] | Construction [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings |  |  |
Consumer [Member] | Other [Member] |  |  |
Summary of nonperforming assets |  |  |
Nonaccruing troubled debt restructurings | $ 1 | $ 13 |

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