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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Components Comprising Deferred Tax Assets and Liabilities | The components comprising our deferred tax assets and liabilities are as follows:
| December 31,
(In thousands) | 2018 |  | 2017
Deferred tax assets |  |  |
Federal net operating loss carryforwards | $ | 102,806 |  |  | $ | 110,350 |
State net operating loss carryforwards | 55,478 |  |  | 45,096 |
Share-based compensation | 15,127 |  |  | 14,226 |
Other | 53,434 |  |  | 35,161 |
Gross deferred tax assets | 226,845 |  |  | 204,833 |
Valuation allowance | (39,516 | ) |  | (28,821 | )
Deferred tax assets, net of valuation allowance | 187,329 |  |  | 176,012 |
Deferred tax liabilities |  |  |
Difference between book and tax basis of property and intangible assets | 259,495 |  |  | 219,090 |
State tax liability | 38,891 |  |  | 33,777 |
Other | 10,205 |  |  | 9,802 |
Gross deferred tax liabilities | 308,591 |  |  | 262,669 |
Deferred tax liabilities, net | $ | 121,262 |  |  | $ | 86,657 |
Summary of Provision (Benefit) for Income Taxes | A summary of the provision (benefit) for income taxes is as follows:
| Year Ended December 31,
(In thousands) | 2018 |  | 2017 |  | 2016
Current |  |  |  |  |
Federal | $ | (584 | ) |  | $ | (10,367 | ) |  | $ | — |
State | 5,897 |  |  | 5,335 |  |  | 1,242 |
Total current taxes provision | 5,313 |  |  | (5,032 | ) |  | 1,242 |
Deferred |  |  |  |  |
Federal | 29,434 |  |  | 6,449 |  |  | (192,472 | )
State | 5,584 |  |  | 1,698 |  |  | (8,703 | )
Total deferred taxes benefit | 35,018 |  |  | 8,147 |  |  | (201,175 | )
Provision (benefit) for income taxes from continuing operations | $ | 40,331 |  |  | $ | 3,115 |  |  | $ | (199,933 | )
Provision (benefit) for income taxes included on the consolidated statement of operations |  |  |  |  |
Provision (benefit) for income taxes from continuing operations | $ | 40,331 |  |  | $ | 3,115 |  |  | $ | (199,933 | )
Provision (benefit) for income taxes from discontinued operations | 136 |  |  | 14,855 |  |  | 146,379 |
Provision (benefit) for income taxes from continuing and discontinued operations | $ | 40,467 |  |  | $ | 17,970 |  |  | $ | (53,554 | )
Schedule of Effective Income Tax Rate Reconciliation | The following table provides a reconciliation between the federal statutory rate and the effective income tax rate, expressed as a percentage of income from continuing operations before income taxes:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Tax at federal statutory rate | 21.0 | % |  | 35.0 | % |  | 35.0 | %
Federal statutory rate change on deferred tax liability | — | % |  | (35.2 | )% |  | — | %
State income taxes, net of federal benefit | 5.9 | % |  | 2.7 | % |  | (60.8 | )%
Compensation-based credits | (1.9 | )% |  | (1.0 | )% |  | (22.3 | )%
Valuation allowance for deferred tax assets | — | % |  | — | % |  | (2,548.1 | )%
Nondeductible expenses | 0.7 | % |  | 0.5 | % |  | 10.6 | %
Tax exempt interest | (0.2 | )% |  | (0.3 | )% |  | (7.1 | )%
Company provided benefits | 0.1 | % |  | 0.5 | % |  | 15.2 | %
Other, net | 0.4 | % |  | (0.4 | )% |  | 3.7 | %
Effective tax rate | 26.0 | % |  | 1.8 | % |  | (2,573.8 | )%
Reconciliation of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
| Year Ended December 31,
(In thousands) | 2018 |  | 2017 |  | 2016
Unrecognized tax benefit, beginning of year | $ | 2,482 |  |  | $ | 2,482 |  |  | $ | 2,482 |
Additions: |  |  |  |  |
Tax positions related to current year | — |  |  | — |  |  | — |
Reductions: |  |  |  |  |
Tax position related to prior years | — |  |  | — |  |  | — |
Unrecognized tax benefits, end of year | $ | 2,482 |  |  | $ | 2,482 |  |  | $ | 2,482 |

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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 reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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