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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Components Of The Provision For Income Taxes | The components of the provision for income taxes are as follows:
|  | Year Ended December 31,
(In thousands) |  | 2017 |  | 2016 |  | 2015
Current: |  |  |  |  |  |
Federal |  | $ | 169,053 |  |  | $ | 126,903 |  |  | $ | 120,437 |
State |  | 25,644 |  |  | 20,111 |  |  | 21,248 |
|  | 194,697 |  |  | 147,014 |  |  | 141,685 |
Deferred: |  |  |  |  |  |
Federal |  | (81,551 | ) |  | 29,354 |  |  | 38,549 |
State |  | (1,088 | ) |  | 5,454 |  |  | 5,093 |
|  | (82,639 | ) |  | 34,808 |  |  | 43,642 |
Total provision for income taxes |  | $ | 112,058 |  |  | $ | 181,822 |  |  | $ | 185,327 |
Schedule Of Effective Income Tax Reconciliation Of The U.S. Statutory Federal Income Tax Rates | The following is a reconciliation of income tax expense calculated using the U.S. statutory federal income tax rate with our income tax expense for 2017, 2016 and 2015:
|  | Year Ended December 31,
(In thousands) |  | 2017 |  | 2016 |  | 2015
Tax provision at statutory rate |  | $ | 201,541 |  |  | $ | 167,156 |  |  | $ | 171,506 |
State income taxes, net of federal benefit |  | 20,277 |  |  | 16,711 |  |  | 17,097 |
Revaluation of deferred taxes in connection with the Tax Act |  | (104,864 | ) |  | — |  |  | — |
Other, net |  | (4,896 | ) |  | (2,045 | ) |  | (3,276 | )
Total provision for income taxes |  | $ | 112,058 |  |  | $ | 181,822 |  |  | $ | 185,327 |
Schedule Of Deferred Tax Assets And Liabilities | Deferred tax assets and liabilities, which are included in "Other assets" and "Deferred income taxes" on our Balance Sheets, consist of the following:
|  | December 31,
(In thousands) |  | 2017 |  | 2016
Deferred tax assets: |  |  |  |
Claims and insurance reserves |  | $ | 29,008 |  |  | $ | 43,409 |
Accrued vacation |  | 17,832 |  |  | 24,227 |
Deferred compensation |  | 29,220 |  |  | 40,742 |
Other |  | 15,157 |  |  | 11,593 |
Total deferred tax assets |  | 91,217 |  |  | 119,971 |
Deferred tax liabilities: |  |  |  |
Depreciation and amortization |  | (266,730 | ) |  | (376,034 | )
Unrecognized revenue |  | (10,007 | ) |  | (11,465 | )
Other |  | (1,703 | ) |  | (2,334 | )
Total deferred tax liabilities |  | (278,440 | ) |  | (389,833 | )
Net deferred tax liability |  | $ | (187,223 | ) |  | $ | (269,862 | )

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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=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://www.xbrl.org/2003/role/presentationRef -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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- 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://www.xbrl.org/2003/role/presentationRef -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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