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Note 7 - Income Taxes | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Income Tax Disclosure [Text Block] | 7 . Income Taxes We recorded a $56.5 million deferred income taxes benefit in 2017 to recognize the impact on our federal net deferred tax liability of the reduction of the federal corporate statutory income tax rate from 35% to 21% related to the Tax Cuts and Jobs Act of 2017, which was enacted prior to December 31, 2017. Excluding that benefit, the 2017 federal deferred provision was $8.0 million and the effective tax rate was 40.1%. The Tax Cuts and Jobs Act of 2017 makes broad and complex changes to the U.S. tax code including, but not limited to, reducing the federal corporate income tax rate as noted above beginning on January 1, 2018 and allowing bonus depreciation with full expensing of qualified property placed in service after September 27, 2017. The components of the income taxes expense (benefit) consisted of the following:
(In thousands) |  | 201 8 |  |  | 2017 |  |  | 2016 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 7,575 |  |  | $ | 12,427 |  |  | $ | 8,987 |
State |  |  | 3,076 |  |  |  | 990 |  |  |  | 1,125 |
Total current |  |  | 10,651 |  |  |  | 13,417 |  |  |  | 10,112 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 5,815 |  |  |  | (48,424 | ) |  |  | 12,427 |
State |  |  | (464 | ) |  |  | 1,196 |  |  |  | 1,063 |
Total deferred |  |  | 5,351 |  |  |  | (47,228 | ) |  |  | 13,490 |
Total expense (benefit) |  | $ | 16,002 |  |  | $ | (33,811 | ) |  | $ | 23,602 |
The federal statutory income tax rate is reconciled to the effective income tax rate as follows:
|  | 201 8 |  |  | 2017 |  |  | 2016 |
Federal statutory income tax rate |  |  | 21 | % |  |  | 35 | % |  |  | 35 | %
Per diem and other non-deductible expenses |  |  | 2 |  |  |  | 4 |  |  |  | 4 |
Increase in taxes arising from state income taxes, net of federal income tax benefit |  |  | 3 |  |  |  | 3 |  |  |  | 2 |
Federal tax credits |  |  | (2 | ) |  |  | (1 | ) |  |  | — |
Decrease in federal deferred taxes due to decrease in statutory rate |  |  | — |  |  |  | (100 | ) |  |  | — |
Other, net |  |  | (1 | ) |  |  | (1 | ) |  |  | — |
Effective tax rate |  |  | 23 | % |  |  | (60 | )% |  |  | 41 | %
As of December 31, the net deferred tax liability consisted of the following:
(In thousands) |  | 201 8 |  |  | 2017 |
Deferred tax assets: |  |  |  |  |  |  |  |
Reserves and accrued liabilities |  | $ | 7,986 |  |  | $ | 7,277 |
Other |  |  | 2,313 |  |  |  | 1,965 |
|  |  | 10,299 |  |  |  | 9,242 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Depreciation |  |  | 113,773 |  |  |  | 107,453 |
Prepaid expenses |  |  | 2,503 |  |  |  | 2,415 |
|  |  | 116,276 |  |  |  | 109,868 |
Net deferred tax liability |  | $ | 105,977 |  |  | $ | 100,626 |
We have not provided a valuation allowance against deferred tax assets at December 31, 2018 or 2017. We believe the deferred tax assets will be realized principally through future reversals of existing taxable temporary differences (deferred tax liabilities) and future taxable income. Our reserves for unrecognized tax benefits were $1.9 million as of December 31, 2018 and $407,000 as of December 31, 2017. The $1.5 million increase in the amount reserved in 2018 relates to current period tax positions and an amendment to prior periods’ open returns for a current position less the removal of the reserve relating to 2013 tax positions, as that period has now closed. The amount reserved as of December 31, 2017 was added in 2013 through 2017 relating to current period tax positions. If recognized, $1.8 million of the unrecognized tax benefits as of December 31, 2018 would favorably impact our effective tax rate. Potential interest and penalties related to unrecognized tax benefits of $12,000 and $11,000 were recognized in our financial statements as of December 31, 2018 and 2017, respectively. We do not expect the reserves for unrecognized tax benefits to change significantly within the next twelve months. The federal statute of limitations remains open for 2015 and forward. We file tax returns in numerous state jurisdictions with varying statutes of limitations.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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