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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Schedule of Income Tax Expense (Benefit) | Income tax expense (benefit) for the years ended December 31 is comprised of:
(dollars in thousands) | 2016 |  |  | 2015 |  |  | 2014 |
Federal |  |  |  |  |
Current | $ | 24,521 |  |  | $ | 24,825 |  |  | $ | 15,979 |
Deferred | 665 |  |  | (427 | ) |  | 1,536 |
Total Federal | 25,186 |  |  | 24,398 |  |  | 17,515 |
State |  |  |  |  |
Current | 248 |  |  | — |  |  | — |
Deferred | (129 | ) |  | — |  |  | — |
Total State | 119 |  |  | — |  |  | — |
Total Federal and State | $ | 25,305 |  |  | $ | 24,398 |  |  | $ | 17,515 |
Schedule of Statutory to Effective Tax Rate Reconciliation | The statutory to effective tax rate reconciliation for the years ended December 31 is as follows:
| 2016 |  | 2015 |  | 2014 |
Statutory tax rate | 35.0 | % | 35.0 | % | 35.0 | %
Low income housing tax credits | (3.8 | )% | (4.4 | )% | (5.8 | )%
Tax-exempt interest | (4.4 | )% | (4.1 | )% | (4.6 | )%
Bank owned life insurance | (0.8 | )% | (0.8 | )% | (0.8 | )%
Other | 0.2 | % | 1.0 | % | (0.6 | )%
Effective Tax Rate | 26.2 | % | 26.7 | % | 23.2 | %
Schedule of Significant Components of Temporary Differences with Deferred Tax Assets and Liabilities | Significant components of our temporary differences were as follows at December 31:
(dollars in thousands) | 2016 |  |  | 2015 |
Deferred Tax Liabilities: |  |  |
Net unrealized holding gains on securities available-for-sale | $ | (2,557 | ) |  | $ | (3,563 | )
Prepaid pension | (2,770 | ) |  | (2,865 | )
Deferred loan income | (3,815 | ) |  | (2,847 | )
Depreciation on premises and equipment | (1,239 | ) |  | (1,226 | )
Other | (1,766 | ) |  | (809 | )
Total Deferred Tax liabilities | (12,147 | ) |  | (11,310 | )
Deferred Tax Assets: |  |  |
Allowance for loan losses | 19,446 |  |  | 17,740 |
Purchase accounting adjustments | 365 |  |  | 1,298 |
Other employee benefits | 3,983 |  |  | 2,556 |
Low income housing partnerships | 4,845 |  |  | 4,531 |
Net adjustment to funded status of pension | 10,018 |  |  | 12,425 |
Impairment of securities | 1,318 |  |  | 1,354 |
State net operating loss carryforwards | 3,114 |  |  | 2,670 |
Other | 4,984 |  |  | 6,155 |
Gross Deferred Tax Assets | 48,073 |  |  | 48,729 |
Less: Valuation allowance | (3,114 | ) |  | (2,670 | )
Total Deferred Tax Assets | 44,959 |  |  | 46,059 |
Net Deferred Tax Asset | $ | 32,812 |  |  | $ | 34,749 |
Schedule of Reconciliation of Change in Federal and State Gross Unrecognized Tax Benefits | The following table reconciles the change in Federal and State gross unrecognized tax benefits, or UTB, for the years ended December 31:
(dollars in thousands) | 2016 |  |  | 2015 |  |  | 2014 |
Balance at beginning of year | $ | 1,102 |  |  | $ | 284 |  |  | $ | 1,902 |
Prior period tax positions |  |  |  |  |
Increase | — |  |  | 818 |  |  | 55 |
Decrease | (449 | ) |  | — |  |  | (1,673 | )
Current period tax positions | 151 |  |  | — |  |  | — |
Reductions for statute of limitations expirations | — |  |  | — |  |  | — |
Balance at End of Year | $ | 804 |  |  | $ | 1,102 |  |  | $ | 284 |
Amount That Would Impact the Effective Tax Rate if Recognized | $ | 610 |  |  | $ | 542 |  |  | $ | 184 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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