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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2013
Income Taxes |
Summary of income tax expense |
|  | Year Ended December 31, |
--- | --- | --- | ---
(In thousands) |  | 2013 |  | 2012 |  | 2011 |
Current |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 56,544 |  | $ | 24,618 |  | $ | 39,749 |
State |  |  | 10,841 |  |  | 563 |  |  | (1,714 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  |  | 67,385 |  |  | 25,181 |  |  | 38,035 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred |  |  |  |  |  |  |  |  |  |
Federal |  |  | 111,147 |  |  | 57,704 |  |  | 46,599 |
State |  |  | 27,233 |  |  | 23,225 |  |  | 28,145 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  |  | 138,380 |  |  | 80,929 |  |  | 74,744 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income tax expense |  | $ | 205,765 |  | $ | 106,110 |  | $ | 112,779 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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Schedule of reconciliation of actual provision for income taxes and provision for income taxes computed by applying the statutory federal income tax rate |
|  | Year Ended December 31, |
--- | --- | --- | ---
(In thousands) |  | 2013 |  | 2012 |  | 2011 |
Statutory federal income tax rate |  |  | 35% |  |  | 35% |  |  | 35% |
Computed "expected" federal income tax |  | $ | 169,938 |  | $ | 83,244 |  | $ | 82,316 |
State income tax, net of federal income tax benefit |  |  | 17,513 |  |  | 9,609 |  |  | 8,989 |
Deferred tax adjustment related to change in overall state tax rate |  |  | 15,220 |  |  | 13,596 |  |  | 19,068 |
Other, net |  |  | 3,094 |  |  | (339 | ) |  | 2,406 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income tax expense |  | $ | 205,765 |  | $ | 106,110 |  | $ | 112,779 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of deferred tax liabilities and deferred tax assets |
|  | December 31, |
--- | --- | --- | ---
(In thousands) |  | 2013 |  | 2012 |
Deferred Tax Assets |  |  |  |  |  |  |
Net operating loss carryforward |  | $ | 78,182 |  | $ | 137,422 |
Alternative minimum tax carryforward |  |  | 182,212 |  |  | 125,862 |
Foreign tax credit |  |  | 4,822 |  |  | 4,923 |
Derivatives and hedging |  |  | 3,946 |  |  | — |
Incentive compensation |  |  | 36,450 |  |  | 30,985 |
Deferred compensation |  |  | 11,988 |  |  | 8,485 |
Post-retirement benefits |  |  | 13,965 |  |  | 16,498 |
Other |  |  | 3,619 |  |  | 7,078 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  |  | 335,184 |  |  | 331,253 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred Tax Liabilities |  |  |  |  |  |  |
Properties and equipment |  |  | 1,321,241 |  |  | 1,199,213 |
Derivatives and hedging |  |  | — |  |  | 19,915 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  |  | 1,321,241 |  |  | 1,219,128 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net deferred tax liabilities |  | $ | 986,057 |  | $ | 887,875 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of reconciliation of the beginning and ending amounts of unrecognized tax benefits |
|  | Year Ended December 31, |
--- | --- | --- | ---
(In thousands) |  | 2013 |  | 2012 |  | 2011 |
Unrecognized tax benefit balance at beginning of year |  | $ | — |  | $ | — |  | $ | — |
Additions based on tax provisions related to the current year |  |  | 3,700 |  |  | — |  |  | — |
Additions for tax positions of prior years |  |  | — |  |  | — |  |  | — |
Reductions for tax positions of prior years |  |  | — |  |  | — |  |  | — |
Settlements |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrecognized tax benefit balance at end of year |  | $ | 3,700 |  | $ | — |  | $ | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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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=6907707&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=6907707&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=6907707&loc=d3e32687-109319 + Details
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