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Income Taxes | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes The following table summarizes the provision for income taxes:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (in thousands)
Current: |  |  |  |  |
Federal | $ | 35,673 |  |  | $ | 33,032 |  |  | $ | 11,917 |
State | 7,179 |  |  | 6,958 |  |  | 2,173 |
| 42,852 |  |  | 39,990 |  |  | 14,090 |
Deferred: |  |  |  |  |
Federal | 2,924 |  |  | 2,163 |  |  | 13,646 |
State | (1,037 | ) |  | 838 |  |  | 4,004 |
| 1,887 |  |  | 3,001 |  |  | 17,650 |
Tax provision | $ | 44,739 |  |  | $ | 42,991 |  |  | $ | 31,740 |
Deferred income taxes are recorded using the asset and liability method. Deferred tax assets and liabilities are determined based on differences between the financial reporting and income tax basis of assets and liabilities. On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was signed into law, enacting significant changes to corporate tax rates, as well as business-related exclusions, deductions and credits. The primary impact to the Company was the decrease in the U.S. federal corporate income tax rate from 35% to 21%. Accordingly, during the fourth quarter 2017, the Company recognized the effects of the changes in the tax law and rates on its deferred tax balances. The net result of the remeasurement was an approximately $4.5 million decrease to the Company’s net deferred tax assets balance and a corresponding increase to the Company’s provision for income taxes. Significant components of the Company’s federal and state deferred tax asset and liability balances are as follows:
| Year Ended December 31,
| 2017 |  | 2016
| (in thousands)
Deferred tax assets: |  |  |
Allowance for doubtful accounts | $ | 3,109 |  |  | $ | 2,672 |
Deferred compensation | 6,601 |  |  | 8,532 |
Accrued insurance claims | 3,665 |  |  | 5,862 |
Non-deductible reserves | 567 |  |  | 1,257 |
Amortization of intangibles | 162 |  |  | 624 |
Other | 662 |  |  | 858 |
| 14,766 |  |  | 19,805 |
Deferred tax liabilities: |  |  |
Expensing of housekeeping supplies | (4,678 | ) |  | (6,752 | )
Depreciation of property and equipment | (1,745 | ) |  | (2,568 | )
Other | (845 | ) |  | (663 | )
| (7,268 | ) |  | (9,983 | )
Net deferred tax assets | $ | 7,498 |  |  | $ | 9,822 |
Realization of the Company’s deferred tax assets is dependent upon future earnings in specific tax jurisdictions, the timing and amount of which are uncertain. Management assesses the Company’s income tax positions and records tax benefits for all years subject to examination based upon an evaluation of the facts, circumstances, and information available at the reporting dates, which include historical operating results and expectations of future earnings. As such, management believes it is more likely than not that the deferred tax assets recorded will be realized to reduce future income taxes and therefore no valuation allowances are necessary. The table below provides a reconciliation between the tax expense computed by applying the statutory federal income tax rate to income before income taxes and the provision for income taxes:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (in thousands)
Income tax expense computed at statutory rate | $ | 46,538 |  |  | $ | 42,136 |  |  | $ | 31,418 |
Increases (decreases) resulting from: |  |  |  |  |
State income taxes, net of federal tax benefit | 3,661 |  |  | 5,064 |  |  | 4,015 |
Federal jobs credits | (4,193 | ) |  | (4,550 | ) |  | (3,900 | )
Tax exempt interest | (568 | ) |  | (457 | ) |  | (132 | )
Other, net | (699 | ) |  | 798 |  |  | 339 |
Income tax expense | $ | 44,739 |  |  | $ | 42,991 |  |  | $ | 31,740 |
The Company performs an evaluation each period of its tax positions taken and expected to be taken in tax returns. The evaluation is performed on positions relating to tax years that remain subject to examination by major tax jurisdictions, the earliest of which is the tax year ended December 31, 2012. Based on the evaluation, the Company concluded that there are no significant uncertain tax positions requiring recognition in the Company’s financial statements. Therefore, the table reporting on the change in the liability for unrecognized tax benefits during the years ended December 31, 2017 and 2016 is omitted as there is no activity to report in such account for the years ended December 31, 2017 or 2016, and there was no balance of unrecognized tax benefits at the beginning of 2016. The Company may from time to time be assessed interest or penalties by taxing jurisdictions, although any such assessments historically have been minimal and immaterial to its financial results. When the Company has received an assessment for interest and/or penalties, it will be classified in the financial statements as selling, general and administrative expense. In addition, any interest or penalties relating to recognized uncertain tax positions would also be recorded in selling, general and administrative expense.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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