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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Income Tax Expense | The following tables provide: (a) the components of income tax expense in 2018, 2017, and 2016; (b) the reconciliation between the statutory federal income tax rate and the effective income tax rate for 2018, 2017, and 2016; and (c) the components of accumulated deferred income tax assets and liabilities at December 31, 2018 and 2017.
| For the Year Ended December 31,
| 2018 |  | 2017 |  | 2016
(in thousands) |  |  |  |  |
Current Income Tax Expense |  |  |  |  |
Federal | $ | (845 | ) |  | $ | 2,803 |  |  | $ | (4,898 | )
State | 660 |  |  | 492 |  |  | 2,053 |
Other | (47 | ) |  | (71 | ) |  | (71 | )
Total current income tax expense | (232 | ) |  | 3,224 |  |  | (2,916 | )
Deferred Income Tax Expense (1) |  |  |  |  |
Property, plant and equipment | 19,164 |  |  | 8,314 |  |  | 31,062 |
Deferred gas costs | (1,435 | ) |  | 2,002 |  |  | 1,163 |
Pensions and other employee benefits | 463 |  |  | 180 |  |  | 237 |
FPU merger-related premium cost and deferred gain | (528 | ) |  | (1,148 | ) |  | (572 | )
Net operating loss carryforwards | (331 | ) |  | 193 |  |  | (9 | )
Other | 3,893 |  |  | 1,544 |  |  | (624 | )
Total deferred income tax expense | 21,226 |  |  | 11,085 |  |  | 31,257 |
Total Income Tax Expense | $ | 20,994 |  |  | $ | 14,309 |  |  | $ | 28,341 |
(1) Includes $3.5 million, $873,000 and $2.1 million of deferred state income taxes for the years 2018, 2017 and 2016, respectively.
Summary of Reconciliation of Statutory Federal Tax and Effective Income Tax Rates |
| For the Year Ended December 31,
| 2018 |  | 2017 |  | 2016
(in thousands) |  |  |  |  |
Reconciliation of Effective Income Tax Rates |  |  |  |  |
Federal income tax expense (1) | $ | 16,291 |  |  | $ | 25,351 |  |  | $ | 22,759 |
State income taxes, net of federal benefit | 4,088 |  |  | 1,894 |  |  | 3,422 |
ESOP dividend deduction | (158 | ) |  | (257 | ) |  | (264 | )
Revaluation of deferred tax assets and liabilities | — |  |  | (14,299 | ) |  | — |
Other | 773 |  |  | 1,620 |  |  | 2,424 |
Total Income Tax Expense | $ | 20,994 |  |  | $ | 14,309 |  |  | $ | 28,341 |
Effective Income Tax Rate (2) | 27.06 | % |  | 19.75 | % |  | 38.81 | %
(1) Federal income taxes were calculated at 21 percent for 2018 and 35 percent for 2017 and 2016. (2)Effective tax rate 2017 includes the impact of the revaluation of deferred tax assets and liabilities for our unregulated businesses due to implementation of the TCJA.
Schedule of Accumulated Deferred Income Tax Assets and Liabilities |
| As of December 31,
| 2018 |  | 2017
(in thousands) |  |  |
Deferred Income Taxes |  |  |
Deferred income tax liabilities: |  |  |
Property, plant and equipment | $ | 153,423 |  |  | $ | 133,581 |
Acquisition adjustment | 8,896 |  |  | 9,323 |
Loss on reacquired debt | 32 |  |  | 153 |
Deferred gas costs | 1,139 |  |  | 2,574 |
Natural gas conversion costs | 3,987 |  |  | 2,760 |
Other | 2,641 |  |  | 2,662 |
Total deferred income tax liabilities | 170,118 |  |  | 151,053 |
Deferred income tax assets: |  |  |
Pension and other employee benefits | 3,711 |  |  | 4,698 |
Environmental costs | 1,710 |  |  | 1,744 |
Net operating loss carryforwards | 2,010 |  |  | 1,625 |
Self-insurance | 151 |  |  | 164 |
Storm reserve liability | — |  |  | 717 |
Other | 5,716 |  |  | 6,255 |
Total deferred income tax assets | 13,298 |  |  | 15,203 |
Deferred Income Taxes Per Consolidated Balance Sheets | $ | 156,820 |  |  | $ | 135,850 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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