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v3.3.1.900

Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Components of the provision for income taxes |  |  |
Federal | $ 0 | $ 0 | $ 0
State | 1,571 | 868 | 2,121
Deferred portion of income tax expense (benefit) | (276,722) | 397,780 | 105,555
Income tax expense (benefit) | $ (275,151) | $ 398,648 | $ 107,676
Effective tax rate (as a percent) | 38.10% | 37.40% | 38.60%
Deferred Income Taxes [Abstract] |  |  |
Deferred Tax Liabilities, Oil and Gas Properties | $ 854,029 | $ 1,029,424 |
Deferred Tax Liabilities, Derivative asset | 179,543 | 220,437 |
Deferred Tax Liabilities, Other | 1,233 | 4,475 |
Deferred Tax Liabilities | 1,034,805 | 1,254,336 |
Deferred Tax Assets, Federal and State Tax Net Operating Loss Carryforwards | 244,942 | 184,447 |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 14,529 | 16,763 |
Deferred Tax Assets, Other Liabilities | 27,449 | 25,715 |
Deferred Tax Assets, Gross | 286,920 | 226,925 |
Deferred Tax Assets, Valuation Allowance | (10,394) | (7,246) |
Deferred Tax Assets, Net | 276,526 | 219,679 |
Deferred Tax Liabilities, Net | 758,279 | 1,034,657 |
Unrecognized Tax Benefits, Exercise of Stock Awards | 126,700 |  |
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Federal statutory tax expense (benefit) | (253,001) | 372,644 | $ 97,514
State tax expense (benefit) (net of federal benefit) | (21,583) | 21,350 | 9,400
Change in valuation allowance | 3,148 | 2,245 | (314)
Research and development credit | (1,971) | 0 | 0
Other | (1,744) | 2,409 | 1,076
Tax Credit Recorded for IRS R&D Settlement | 2,000 |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized Tax Benefits, Beginning Balance | 1,582 | 2,358 | 2,278
Unrecognized Tax Benefits, Additions For Tax Positions Of Prior Years | 1,200 | 140 | 80
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 0 | (916) | 0
Unrecognized Tax Benefits, Ending Balance | 2,782 | 1,582 | $ 2,358
Internal Revenue Service (IRS) [Member] |  |  |
Deferred Income Taxes [Abstract] |  |  |
Income Taxes Receivable, Current | 5,378 | 4,734 |
Operating Loss Carryforwards | 796,700 |  |
State and Local Jurisdiction [Member] |  |  |
Deferred Income Taxes [Abstract] |  |  |
Income Taxes Receivable, Current | 65 | 0 |
Taxes Payable, Current | 0 | $ 25 |
Operating Loss Carryforwards | 338,900 |  |
Minimum [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Increase in Unrecognized Tax Benefits is Reasonably Possible | 0 |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 0 |  |
Maximum [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Increase in Unrecognized Tax Benefits is Reasonably Possible | 1,800 |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 1,800 |  |
Internal Revenue Service (IRS) [Member] | Research Tax Credit Carryforward [Member] | Domestic Tax Authority [Member] |  |  |
Deferred Income Taxes [Abstract] |  |  |
Tax Credit Carryforward, Amount | $ 7,200 |  |

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