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Federal Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Components of Income Tax Expense (Benefit) | The components of income tax expense (benefit) for the years ended December 31 are as follows:
|  | (In Thousands) |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 5,162 |  |  | $ | 4,601 |  |  | $ | 3,941 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 29 |  |  |  | 55 |  |  |  | (122 | )
Federal - impact of enacted changes in tax law |  |  | (8 | ) |  |  | — |  |  |  | — |
|  | $ | 5,183 |  |  | $ | 4,656 |  |  | $ | 3,819 |
Reconciliation of the Statutory Federal Income Tax Rate to the Effective Tax Rate | The following is a reconciliation of the statutory federal income tax rate to the effective tax rate:
|  | (In Thousands) |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Income tax at statutory rates |  | $ | 6,045 |  |  | $ | 5,521 |  |  | $ | 4,792 |
Decrease resulting from: |  |  |  |  |  |  |  |  |  |  |  |
Tax exempt interest |  |  | (413 | ) |  |  | (468 | ) |  |  | (554 | )
Adjustment of deferred taxes for enacted changes in tax law |  |  | (8 | ) |  |  | — |  |  |  | — |
Section 831 deduction |  |  | (318 | ) |  |  | (351 | ) |  |  | (351 | )
Change in other |  |  | (123 | ) |  |  | (46 | ) |  |  | (68 | )
|  | $ | 5,183 |  |  | $ | 4,656 |  |  | $ | 3,819 |
Components of Deferred Tax Assets and Liabilities | Deferred tax assets and liabilities at December 31 are comprised of the following:
|  | (In Thousands) |
|  | 2017 |  |  | 2016 |
Deferred Tax Assets: |  |  |  |  |  |  |  |
Allowance for loan losses |  | $ | 1,464 |  |  | $ | 2,326 |
Other |  |  | 399 |  |  |  | 553 |
Net unrealized gain on available- for-sale securities |  |  | 581 |  |  |  | 1,016 |
Total deferred tax assets |  |  | 2,444 |  |  |  | 3,895 |
Deferred Tax Liabilities: |  |  |  |  |  |  |  |
Accreted discounts on bonds |  |  | 55 |  |  |  | 83 |
FHLB stock dividends |  |  | 462 |  |  |  | 744 |
Mortgage servicing rights |  |  | 490 |  |  |  | 752 |
Other |  |  | 1,185 |  |  |  | 1,745 |
Net unrealized gain on available- for-sale securities |  |  | — |  |  |  | — |
Total deferred tax liabilities |  |  | 2,192 |  |  |  | 3,324 |
Net Deferred Tax Asset |  | $ | 252 |  |  | $ | 571 |

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